How to Convert a String to an Array in JavaScript

javascript create array from string with delimiter

  • Introduction

Textual data is typically stored through sequences of characters - strings. These sequences, are ultimately, arrays, and converting between the two structures typically is both simple and intuitive. Whether you're breaking a word down into its characters, or a sentence into words - splitting a string into an array isn't an uncommon operation, and most languages have built-in methods for this task.

In this guide, learn how to convert a String to an Array in JavaScript, with the split() , Object.assign() , Array.from() methods and spread[...] operator, as well as when to use which.
  • Split String into Array with split()

The split() method is used to divide a string into an ordered list of two or more substrings, depending on the pattern/divider/delimiter provided, and returns it. The pattern/divider/delimiter is the first parameter in the method's call and can be a regular expression , a single character , or another string .

If you'd like to learn more about Regular Expressions - read our Guide to Regular Expressions and Matching Strings in JavaScript !

For example, suppose we have a string:

We could split it on each whitespace (breaking it down into words), or on every character, or any other arbitrary delimiter, such as 'p' :

One of the major downsides of using single characters or even entire strings is that the approach is fairly rigid. You can't match by multiple delimiters, unless you use a Regular Expression. For instance, say you'd like to break a string into sentences . A sentence can end with a period ( . ), exclamation mark ( ! ), a question mark ( ? ) or three dots ( ... ). Each of these are valid sentences, but we'd have to perform multiple splits to match all of them, if we were to use single characters or strings.

Pattern matching is where Regular Expressions excel! Let's split a string on each sentence, with any of these ending delimiters:

However, the delimiters are lost! We split on them and in the process, remove them from the output. Additionally, we have multiple whitespaces in the beginnings of the sentences, and there's an empty string in the end! This isn't to say that split() doesn't work well with Regular Expressions - but it is to say that splitting sentences out of text isn't solved well by split() . This is where we can use the match() method instead - which returns the matching patterns and their delimiters:

Again, if you're interested in learning more about Regular Expressions - read our Guide to Regular Expressions and Matching Strings in JavaScript !

Note: The split() method takes in a second parameter, which specifies the limit of splitting that can occur. It doesn't alter the number of splits and elements to fit the passed argument, but rather, performs the split n times, from the start, and stops splitting after that.

To limit the number of splits we perform, we can easily supply the second argument of the split() method:

A common use case for the split() method is when someone supplies their full name as a single string:

Here, we can split the name and save it as different fields of an object to the database, for instance:

Instead of having to call get both elements using an array index, we can use array destructuring to make the assignment cleaner:

Note: The split() method doesn't support certain UTF-8 characters, such as emojis (i.e. πŸ˜„, 😍, β£πŸ’—), and will replace them with a pair of οΏ½οΏ½ .

  • Split String into Array with Array.from()

The from() method from the Array class is the leading contender to the split() method. It's used to create an array, given a source of data - and naturally, it can be used to create an array from an iterable string :

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The major benefit of using Array.from() instead of split() is that you don't have to bother with setting a delimiter - the constituent elements are just re-exposed and added to an array, rather than being converted explicitly. Additionally, the Array.from() method supports emoji characters:

  • Split String into Array with the Spread Operator

The Spread Operator has several uses and is a widely-applicable operator in JavaScript. In our context - we'd be most interested in expanding arrays (strings are arrays of characters).

If you'd like to learn more about the Spread Operator - read our Spread Operator in JavaScript !

The operator's syntax is simple and clean - and we can spread out the string into an array :

The operator also works with UTF-8 emojis:

  • Split String with Object.assign()

The Object.assign() method copies all values and properties of one object - and maps them to the properties of another. In a sense - it's used for cloning objects and merging those with the same properties:

In our case - we'd be copying and mapping the values within a string onto an array:

This approach is a bit more verbose, and less aesthetically pleasing than the previous two:

It's worth noting that Object.assign() doesn't support special UTF-8 characters such as emojis:

In this short guide, we've taken a look at how to convert a string into an array in JavaScript. We've explored the split() method, which has the highest level of customizability - including splitting on Regular Expressions! Then, we've explored the creation of arrays from() sources such as strings. The Spread Operator works very well in expanding strings back to arrays, and we've finally covered the Object.assign() method to assign the values of a string to an array.

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  • JavaScript: Check if First Letter of a String is Upper Case
  • Using Mocks for Testing in JavaScript with Sinon.js
  • For-each Over an Array in JavaScript
  • Commenting Code in JavaScript - Types and Best Practices

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How to Create Array from a Comma-Separated String in JavaScript

  • #javascript

How to Create Array from a Comma-Separated String in JavaScript

Table of Contents

How to create an array from a comma-separated string in javascript.

Sometimes you have a comma-separated string and you want to convert it to an array.

A good example is if you're reading a CSV file and you want to retrieve the data as an array.

In this post, we'll learn how to create an array from a comma-separated string in JavaScript .

To start, let's define an example comma-separated string:

Now, we can use the built-in split method and pass it a separator, in this case, a comma, and it will take our string and turn it into an array.

That's all there is to it.

In case you want to limit how many times the separator is used, you can pass an optional second argument to the split method.

Let's say you only want the first two elements:

Alternatively, if you pass the method a blank string as the separator, it will simply split the string into individual characters.

In this post, we looked at the different ways to create an array from a comma-separated string in JavaScript.

Simply use the split method and pass it a separator and the return value will be an array.

Thanks for reading!

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How to Convert Comma Separated String into an Array in JavaScript

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Answer: Use the split() Method

You can use the JavaScript split() method to split a string using a specific separator such as comma ( , ), space, etc. If separator is an empty string, the string is converted to an array of characters.

The following example demonstrates how to convert a comma separated string of person name into an array and retrieve the individual name using JavaScript.

Please check out the tutorial on JavaScript Strings to learn more about string manipulation.

Related FAQ

Here are some more FAQ related to this topic:

  • How to check if a value exists in an array in JavaScript
  • How to remove duplicate values from a JavaScript array
  • How to display all items or values in an array using loop in jQuery

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JavaScript Split – How to Split a String into an Array in JS

In general, a string represents a sequence of characters in a programming language.

Let's look at an example of a string created using a sequence of characters, "Yes, You Can DO It!". In JavaScript, we can create a string in a couple of ways:

  • Using the string literal as a primitive
  • Using the String() constructor as an object

One interesting fact about strings in JavaScript is that we can access the characters in a string using its index. The index of the first character is 0, and it increments by 1. So, we can access each of the characters of a string like this:

The image below represents the same thing:

split

Apart from its ability to access string characters by their indices, JavaScript also provides plenty of utility methods to access characters, take out a part of a string, and manipulate it.

In this article will learn about a handy string method called split() . I hope you enjoy reading it.

The split() Method in JavaScript

The split() method splits (divides) a string into two or more substrings depending on a splitter (or divider). The splitter can be a single character, another string, or a regular expression.

After splitting the string into multiple substrings, the split() method puts them in an array and returns it. It doesn't make any modifications to the original string.

Let's understand how this works with an example. Here is a string created using string literals:

We can call the split() method on the message string. Let's split the string based on the space ( '  ' ) character. Here the space character acts as a splitter or divider.

The main purpose of the split() method is to get the chunks you're interested in from a string to use them in any further use cases.

How to Split a String by Each Character

You can split a string by each character using an empty string('') as the splitter. In the example below, we split the same message using an empty string. The result of the split will be an array containing all the characters in the message string.

πŸ’‘ Please note that splitting an empty string('') using an empty string as the splitter returns an empty array. You may get this as a question in your upcoming job interviews!

How to Split a String into One Array

You can invoke the split() method on a string without a splitter/divider. This just means the split() method doesn't have any arguments passed to it.

When you invoke the split() method on a string without a splitter, it returns an array containing the entire string.

πŸ’‘ Note again, calling the split() method on an empty string('') without a splitter will return an array with an empty string. It doesn't return an empty array.

Here are two examples so you can see the difference:

How to Split a String Using a Non-matching Character

Usually, we use a splitter that is part of the string we are trying to split. There could be cases where you may have passed a splitter that is not part of the string or doesn't match any part of it. In that case, the split() method returns an array with the entire string as an element.

In the example below, the message string doesn't have a comma (,) character. Let's try to split the string using the splitter comma (,).

πŸ’‘ You should be aware of this as it might help you debug an issue due to a trivial error like passing the wrong splitter in the split() method.

How to Split with a Limit

If you thought that the split() method only takes the splitter as an optional parameter, let me tell you that there is one more. You can also pass the limit as an optional parameter to the split() method.

As the name indicates, the limit parameter limits the number of splits. It means the resulting array will only have the number of elements specified by the limit parameter.

In the example below, we split a string using a space (' ') as a splitter. We also pass the number 4 as the limit. The split() method returns an array with only four elements, ignoring the rest.

How to Split Using Regex

We can also pass a regular expression (regex) as the splitter/divider to the split() method. Let's consider this string to split:

Let's split this string at the period (.), exclamation point (!), and the question mark (?). We can write a regex that identifies when these characters occur. Then we pass the regex to the split() method and invoke it on the above string.

The output looks like this:

image-102

You can use the limit parameter to limit the output to only the first three elements, like this:

image-103

πŸ’‘ If you want to capture the characters used in the regular expressions in the output array, you need to tweak the regex a bit. Use parenthesis to capture the matching characters. The updated regex will be /([.,!,?])/ .

How to Replace Characters in a String using Split() Method

You can solve many interesting problems using the split() method combined with other string and array methods. Let's see one here. It could be a common use case to replace all the occurrences of a character in the string with another character.

For example, you may want to create the id of an HTML element from a name value. The name value may contain a space (' '), but in HTML, the id value must not contain any spaces. We can do this in the following way:

Consider the name has the first name (Tapas) and last name (Adhikary) separated by a space. Here we first split the name using the space splitter. It returns an array containing the first and last names as elements, that is ['Tapas', 'Adhikary'] .

Then we use the array method called join() to join the elements of the array using the - character. The join() method returns a string by joining the element using a character passed as a parameter. Hence we get the final output as Tapas-Adhikary .

ES6: How to Split with Array Destructuring

ECMAScript2015 (ES6) introduced a more innovative way to extract an element from an array and assign it to a variable. This smart syntax is known as Array Destructuring . We can use this with the split() method to assign the output to a variable easily with less code.

Here we split the name using the space character as the splitter. Then we assign the returned values from the array to a couple of variables (the firstName and lastName ) using the Array Destructuring syntax.

Before We End...

πŸ‘‹ Do you want to code and learn along with me? You can find the same content here in this YouTube Video. Just open up your favorite code editor and get started.

I hope you've found this article insightful, and that it helps you understand JavaScript String's split() method more clearly. Please practice the examples multiple times to get a good grip on them. You can find all the code examples in my GitHub repository .

Let's connect. You will find me active on Twitter (@tapasadhikary) . Please feel free to give a follow.

You may also like these articles:

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Convert Array to String (with and without Commas) in JS

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Last updated: Dec 31, 2022 Reading time Β· 4 min

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# Table of Contents

  • Convert Array to comma-separated String in JavaScript
  • Convert Array to String (with and without Commas) using Array.join()
  • Convert an array to a string without commas using String.replaceAll()

# Convert Array to comma-separated String in JavaScript

You can use the String() constructor to convert an array to a comma-separated string.

The String() constructor will return a string where the array elements are separated by commas.

convert array to comma separated string

The only argument we passed to the String object is the value we want to convert to a string.

Since we provided an array, the result is a comma-separated string.

The String() constructor and the Array.toString methods use the join() method to convert the array into a comma-separated string under the hood.

# Convert Array to String (with and without Commas) using Array.join()

An alternative, but also very common approach is to use the Array.join() method.

The Array.join() method will return a string where all of the array elements are joined with a comma separator.

To convert an array to a string without commas, pass an empty string to the Array.join() method.

If the separator argument is set to an empty string, the array elements are joined without any characters in between them.

The Array.join() method concatenates all of the elements in an array using a separator.

The only argument the Array.join() method takes is a separator - the string used to separate the elements of the array.

If a value for the separator argument is omitted, the array elements are joined with a comma , .

You can pass any value for the separator to the Array.join() method. Here are some other examples.

If you call the join method on an empty array, it returns an empty string.

# Working around undefined and null values

An important thing to note is that if the array contains elements that are undefined , null or an empty array [] , they get converted to an empty string.

working around undefined and null values

If you need to remove the null and undefined values from an array before calling the Array.join() method use the Array.filter() method.

using array filter to exclude null and undefined

The function we passed to the Array.filter() method gets called with each element in the array.

On each iteration, we check if the current element is not equal to null and undefined and return the result.

The filter() method returns a new array that only contains the elements that meet the condition.

The last step is to use the Array.join() method to convert the array to a comma-separated string.

# Defining a reusable function

If you have to do this often, define a reusable function.

defining reusable function

The function takes an array as a parameter and converts the array to a comma-separated string.

You can call the join() method with an empty string to convert the array to a string without commas.

The function takes an array and optionally a separator and converts the array to a string without commas.

# Convert an array to a string without commas using String.replaceAll()

To convert an array to a string without commas:

  • Use the Array.map() method to iterate over the array.
  • Use the replaceAll() method to remove all commas from each array element.
  • Use the Array.join() method to join the array to a string without commas.

The function we passed to the Array.map() method gets called with each element in the array.

On each iteration, we use the String.replaceAll() method to remove all commas from the string and return the result.

The map() method returns a new array containing the values returned from the callback function.

The String.replaceAll() method returns a new string with all matches of a pattern replaced by the provided replacement.

The method takes the following parameters:

The String.replaceAll() method returns a new string with the matches of the pattern replaced. The method doesn't change the original string.

The last step is to use the Array.join() method to join the array into a string without commas.

We joined the array elements without a separator, but you can use any other value.

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

  • Convert an Array of Objects to an Array of Values in JS
  • How to convert an Array to a Map in JavaScript
  • Convert Array of Strings to Array of Numbers in JavaScript
  • Convert an Array to an Object using JavaScript

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Array.prototype.join()

The join() method of Array instances creates and returns a new string by concatenating all of the elements in this array, separated by commas or a specified separator string. If the array has only one item, then that item will be returned without using the separator.

A string to separate each pair of adjacent elements of the array. If omitted, the array elements are separated with a comma (",").

Return value

A string with all array elements joined. If array.length is 0 , the empty string is returned.

Description

The string conversions of all array elements are joined into one string. If an element is undefined or null , it is converted to an empty string instead of the string "null" or "undefined" .

The join method is accessed internally by Array.prototype.toString() with no arguments. Overriding join of an array instance will override its toString behavior as well.

Array.prototype.join recursively converts each element, including other arrays, to strings. Because the string returned by Array.prototype.toString (which is the same as calling join() ) does not have delimiters, nested arrays look like they are flattened. You can only control the separator of the first level, while deeper levels always use the default comma.

When an array is cyclic (it contains an element that is itself), browsers avoid infinite recursion by ignoring the cyclic reference.

When used on sparse arrays , the join() method iterates empty slots as if they have the value undefined .

The join() method is generic . It only expects the this value to have a length property and integer-keyed properties.

Joining an array four different ways

The following example creates an array, a , with three elements, then joins the array four times: using the default separator, then a comma and a space, then a plus and an empty string.

Using join() on sparse arrays

join() treats empty slots the same as undefined and produces an extra separator:

Calling join() on non-array objects

The join() method reads the length property of this and then accesses each property whose key is a nonnegative integer less than length .

Specifications

Browser compatibility.

BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

  • Polyfill of Array.prototype.join in core-js
  • Indexed collections guide
  • Array.prototype.toString()
  • TypedArray.prototype.join()
  • String.prototype.split()

Creating arrays by using split method of a string by using delimiter

Breaking without any delimiter

Adding option to limit the array, breaking email address using split.

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An array is a special variable, which can hold more than one value:

Why Use Arrays?

If you have a list of items (a list of car names, for example), storing the cars in single variables could look like this:

However, what if you want to loop through the cars and find a specific one? And what if you had not 3 cars, but 300?

The solution is an array!

An array can hold many values under a single name, and you can access the values by referring to an index number.

Creating an Array

Using an array literal is the easiest way to create a JavaScript Array.

It is a common practice to declare arrays with the const keyword.

Learn more about const with arrays in the chapter: JS Array Const .

Spaces and line breaks are not important. A declaration can span multiple lines:

You can also create an array, and then provide the elements:

Using the JavaScript Keyword new

The following example also creates an Array, and assigns values to it:

The two examples above do exactly the same.

There is no need to use new Array() .

For simplicity, readability and execution speed, use the array literal method.

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Accessing Array Elements

You access an array element by referring to the index number :

Note: Array indexes start with 0.

[0] is the first element. [1] is the second element.

Changing an Array Element

This statement changes the value of the first element in cars :

Converting an Array to a String

The JavaScript method toString() converts an array to a string of (comma separated) array values.

Access the Full Array

With JavaScript, the full array can be accessed by referring to the array name:

Arrays are Objects

Arrays are a special type of objects. The typeof operator in JavaScript returns "object" for arrays.

But, JavaScript arrays are best described as arrays.

Arrays use numbers to access its "elements". In this example, person[0] returns John:

Objects use names to access its "members". In this example, person.firstName returns John:

Array Elements Can Be Objects

JavaScript variables can be objects. Arrays are special kinds of objects.

Because of this, you can have variables of different types in the same Array.

You can have objects in an Array. You can have functions in an Array. You can have arrays in an Array:

Array Properties and Methods

The real strength of JavaScript arrays are the built-in array properties and methods:

Array methods are covered in the next chapters.

The length Property

The length property of an array returns the length of an array (the number of array elements).

The length property is always one more than the highest array index.

Accessing the First Array Element

Accessing the last array element, looping array elements.

One way to loop through an array, is using a for loop:

You can also use the Array.forEach() function:

Adding Array Elements

The easiest way to add a new element to an array is using the push() method:

New element can also be added to an array using the length property:

Adding elements with high indexes can create undefined "holes" in an array:

Associative Arrays

Many programming languages support arrays with named indexes.

Arrays with named indexes are called associative arrays (or hashes).

JavaScript does not support arrays with named indexes.

In JavaScript, arrays always use numbered indexes .  

WARNING !! If you use named indexes, JavaScript will redefine the array to an object.

After that, some array methods and properties will produce incorrect results .

 Example:

The difference between arrays and objects.

In JavaScript, arrays use numbered indexes .  

In JavaScript, objects use named indexes .

Arrays are a special kind of objects, with numbered indexes.

When to Use Arrays. When to use Objects.

  • JavaScript does not support associative arrays.
  • You should use objects when you want the element names to be strings (text) .
  • You should use arrays when you want the element names to be numbers .

JavaScript new Array()

JavaScript has a built-in array constructor new Array() .

But you can safely use [] instead.

These two different statements both create a new empty array named points:

These two different statements both create a new array containing 6 numbers:

The new keyword can produce some unexpected results:

A Common Error

is not the same as:

How to Recognize an Array

A common question is: How do I know if a variable is an array?

The problem is that the JavaScript operator typeof returns " object ":

The typeof operator returns object because a JavaScript array is an object.

Solution 1:

To solve this problem ECMAScript 5 (JavaScript 2009) defined a new method Array.isArray() :

Solution 2:

The instanceof operator returns true if an object is created by a given constructor:

Complete Array Reference

For a complete Array reference, go to our:

Complete JavaScript Array Reference .

The reference contains descriptions and examples of all Array properties and methods.

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Get the value " Volvo " from the cars array.

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  • JavaScript – Join elements of string array with comma
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  • JavaScript – Convert string to integer
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  • JavaScript – Convert Comma-Separated String into Array
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JavaScript – Join Elements of String Array with Delimiter String

Join elements of string array with delimiter string.

To join elements of a string array with given delimiter string as separator in JavaScript, call join() method on the string array and pass the delimiter string as argument in the method call.

The expression to join elements of a string array arr by a delimiter string separator is

In the following example, we take a string array in arr , join the elements in the array with delimiter string ' - ' as separator, and display the resulting string in pre#output.

In the following example, we join the elements of string array arr with delimiter string '++++' as separator, and display the resulting string in pre#output.

In this JavaScript Tutorial , we learned how to join the elements of a string array with given separator string using Array.join() method, with example program.

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How to convert a 2D array to a comma-separated values (CSV) string in JavaScript ?

Given a 2D array, we have to convert it to a comma-separated values (CSV) string using JS.

To achieve this, we must know some array prototype functions which will be helpful in this regard:

Join function: The Array.prototype.join( ) function is used to join all the strings in an array with a character/string.

Map function: The Array.prototype.map() returns a new array with the results of calling a function that we provide, on each element.

Approach: We will use the map function and join function to combine each 1D row into a string with the separation of a comma. and then join all the individual strings with “\n”, using the join function.

Example: In this example, we will be using the map() and join() functions to convert the CSV values to strings.

Explanation: We first used the map function on the 2D array to traverse each row, then we used the join function to join the array of elements in that row using a comma. Next, that map function returns an array of strings, which we join by using “\n”.  Thus resulting in a CSV string.

Alternative Approach: We can even use for loops to traverse in the array, instead of a map.

Example: In this example, we will be using the javascript loops to convert the CSV to strings.

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Join array elements together with a delimiter in JavaScript

This post will discuss how to join elements of an array with a delimiter in JavaScript.

1. Using Array.join() function

One way to join elements of an array using delimiter in JavaScript is to use the Array.join() function. This function joins the elements of an array into a string, separated by a specified delimiter. For example, if we have an array of numbers and we want to convert it to a string using a dash (-) as a separator, we can do this:

Download Β Β  Run Code

  We can use any character or string as the delimiter, such as a comma (,) , a space ( ) , or a plus sign (+) . If we don’t provide any argument to the join() function, it will use the default delimiter, which is a comma (,) . Here’s an example:

2. Using Array.reduce() function

Another way to convert an array to a string using a delimiter is to use the Array.reduce() function. This is a third built-in function that executes a reducer function on each element of the array, resulting in a single output value. We can use this function to convert an array to a string by concatenating each element with a delimiter of our choice. For example, if we have an array of strings and we want to convert it to a string using a slash (/) as the delimiter, we can do this:

  We can also provide an initial value for the accumulator as the second argument to the reduce() function. Here’s an example:

3. Using Array.toString() function

This is another built-in function that returns a string representing the specified array and its elements. This function is equivalent to calling the join() function without any arguments, which means it uses a comma as the default separator. For example:

4. Using Array.map() function

We can also use other functions, such as Array.map() , to join the array elements with a delimiter and perform some additional operations on them. For example, if we want to join the array elements with a space ( ) and capitalize the first letter of each element, we can use the Array.map() function like this:

That’s all about joining elements of an array with a delimiter in JavaScript.

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COMMENTS

  1. javascript

    Is there anything built-in to do this? For example, I have this string var str = "January,February,March,April,May,June,July,August,September,October,November,December"; Now I want to split this by the comma, and then store it in an array. javascript string csv split Share Improve this question Follow edited Sep 30, 2022 at 3:25 Inigo 13.2k 5 45 72

  2. Convert comma separated string to array using JavaScript

    Method 1: Using the JavaScript split () method The split () method is used to split a string based on a separator. This separator could be defined as a comma to separate the string whenever a comma is encountered. This method returns an array of strings that are separated. Syntax: string.split (', ');

  3. Convert a comma-separated String to an Array in JavaScript

    index.js const str = ''; const arr = str.split(','); console.log(arr); // πŸ‘‰οΈ [''] If you want to get an empty array when the string is empty, use the Array.filter () method. index.js const str = ''; const arr = str.split(',').filter(element => element !== ''); console.log(arr); // πŸ‘‰οΈ []

  4. How to Convert a String to an Array in JavaScript

    // Splitstring using an empty string (on each character) let array2 = quote.split ( '' ); console .log (array2); // ["I", " ", "a", "m", " ", "u", "n", "s", "t", "o", "p", "p", "a", "b", "l", "e", "!"] // Split string using a specific character let array3 = quote.split ( 'p' ); console .log (array3); // ["I am unsto", "", "able!" ]

  5. How to Create Array from a Comma-Separated String in JavaScript

    How to create an array from a comma-separated string in JavaScript. To start, let's define an example comma-separated string: const string = "apple,banana,orange" ; Now, we can use the built-in split method and pass it a separator, in this case, a comma, and it will take our string and turn it into an array. const string = "apple,banana,orange ...

  6. How to Convert Comma Separated String into an Array in JavaScript

    If separator is an empty string, the string is converted to an array of characters. The following example demonstrates how to convert a comma separated string of person name into an array and retrieve the individual name using JavaScript.

  7. JavaScript Split

    In JavaScript, we can create a string in a couple of ways: Using the string literal as a primitive const msg = "Yes, You Can DO It!"; Using the String () constructor as an object const msg = new String("Yes, You Can DO It!"); One interesting fact about strings in JavaScript is that we can access the characters in a string using its index.

  8. String.prototype.split()

    The pattern describing where each split should occur. Can be undefined, a string, or an object with a Symbol.split method β€” the typical example being a regular expression. Omitting separator or passing undefined causes split () to return an array with the calling string as a single element. All values that are not undefined or objects with a ...

  9. JavaScript String split() Method

    Description The split () method splits a string into an array of substrings. The split () method returns the new array. The split () method does not change the original string. If (" ") is used as separator, the string is split between words. See Also The slice () Method The substr () Method The substring () Method Syntax

  10. How to convert array into comma separated string in javascript

    You can use let comma_seprated = a.value.join () or let comma_seprated = a.value.join (", ") - Nandeep Barochiya May 26, 2021 at 6:11 Add a comment 3 Answers Sorted by: 303 The method array.toString () actually calls array.join () which result in a string concatenated by commas. ref

  11. Convert Array to String (with and without Commas) in JS

    To convert an array to a string without commas, pass an empty string to the Array.join () method. index.js const arr = ['bobby', 'hadz', '.com']; const withoutCommas = arr.join(''); console.log(withoutCommas); // πŸ‘‰οΈ 'bobbyhadz.com' console.log(typeof withoutCommas); // πŸ‘‰οΈ string

  12. Array.prototype.join()

    The join () method of Array instances creates and returns a new string by concatenating all of the elements in this array, separated by commas or a specified separator string. If the array has only one item, then that item will be returned without using the separator. Try it Syntax js join() join(separator) Parameters separator Optional

  13. Split() method to create array by breaking string using delimiterin in

    Syntax var array_name=string_variable.split (" "); Creating arrays in JavaScript & adding elements by using constructor and breaking string using split Here one space is used as delimiter for creating an array. Now let us use one string variable to store a sentence and create an array out this by using one space as delimiter in a split () method.

  14. Create a comma separated list from an array in JavaScript

    Syntax: array.toString () Return value: It returns a string that represents the values of the array, separated by a comma. Example: This example uses the toString () method to convert an array into a comma-separated list. using Array literal Javascript let arr = ["GFG1", "GFG2", "GFG3"];

  15. Easy way to turn JavaScript array into comma-separated list?

    toString (): If you are looking for the simplest way it's better to use toString () like this: var arr = ["Zero", "One", "Two"]; console.log (arr.toString ()); which returns Zero,One,Two Read more - Muhammad Musavi May 30, 2018 at 6:34 Add a comment 22 Answers Sorted by: 984 The Array.prototype.join () method:

  16. JavaScript Arrays

    Using an array literal is the easiest way to create a JavaScript Array. Syntax: const array_name = [ item1, item2, ... ]; It is a common practice to declare arrays with the const keyword. Learn more about const with arrays in the chapter: JS Array Const. Example const cars = ["Saab", "Volvo", "BMW"]; Try it Yourself Β»

  17. JavaScript

    To join elements of a string array with given delimiter string as separator in JavaScript, call join () method on the string array and pass the delimiter string as argument in the method call. The expression to join elements of a string array arr by a delimiter string separator is. arr.join (separator);

  18. How to convert a 2D array to a comma-separated values (CSV) string in

    Explanation: We first used the map function on the 2D array to traverse each row, then we used the join function to join the array of elements in that row using a comma. Next, that map function returns an array of strings, which we join by using "\n". Thus resulting in a CSV string. Alternative Approach: We can even use for loops to ...

  19. javascript

    5 Answers Sorted by: 70 Array.prototype.join () is what you're looking for: arr.join (','); https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/join var arr = ['Hi', 'I', 'am', 'a', 'comma', 'separated', 'list']; arr.join (','); // === "Hi,I,am,a,comma,separated,list" Share

  20. Join array elements together with a delimiter in JavaScript

    One way to join elements of an array using delimiter in JavaScript is to use the Array.join () function. This function joins the elements of an array into a string, separated by a specified delimiter. For example, if we have an array of numbers and we want to convert it to a string using a dash (-) as a separator, we can do this: 1.

  21. javascript

    Jquery - Create an array from a delimited string and then evaluate its values Ask Question Asked 12 years, 5 months ago Modified 12 years, 5 months ago Viewed 36k times 5 i've this problem i'm not really able to solve. i have this string "B01, B20, B03, "