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:
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:
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
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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