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JavaScript: Chop a string into chunks of a specific length

JavaScript String: Exercise-17 with Solution

Write a JavaScript function to chop a string into chunks of a given length.

Test Data:
console.log(string_chop('w3resource'));
console.log(string_chop('w3resource',2));
console.log(string_chop('w3resource',3));
["w3resource"]
["w3", "re", "so", "ur", "ce"]
["w3r", "eso", "urc", "e"]

Pictorial Presentation:

JavaScript: Chop a string into chunks of a specific length

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>chop a string into chunks of a given length</title>
</head>
<body>
</body>
</html>

JavaScript Code:

string_chop =  function(str, size){
      if (str == null) return [];
      str = String(str);
      size = ~~size;
return size > 0 ? str.match(new RegExp('.{1,' + size + '}', 'g')) : [str];
}
console.log(string_chop('w3resource'));
console.log(string_chop('w3resource',2));
console.log(string_chop('w3resource',3));

Sample Output:

["w3resource"]
["w3","re","so","ur","ce"]
["w3r","eso","urc","e"]

Flowchart:

Flowchart: JavaScript- Chop a string into chunks of a specific length

Live Demo:

See the Pen JavaScript Chop a string into chunks of a specific length - string-ex-17 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript function to truncate a string if it is longer than the specified number of characters.
Next: Write a JavaScript function to count the occurrence of a substring in a string.

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JavaScript: Tips of the Day

var functionName = function() {} vs function functionName() {}

The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).

For example, a function expression:

// TypeError: functionOne is not a function
functionOne();

var functionOne = function() {
  console.log("Hello!");
};

Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.

'use strict';    
{ // note this block!
  function functionThree() {
    console.log("Hello!");
  }
}
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O