Question 283633 in Javascript Question posted in
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Javascript – How to split a string at a certain index?

I want to split a string every 4 characters and push them into an array. I have been trying to loop through using .substring but my loop stops at the first 4 characters.

So want to turn this string…

let list = "abcdefghijklmnop"

into this array…

[ "abcd", "efgh", "ijkl", "mnop"]
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2

Answers


  1. 0

    You can achieve this by using a loop to iterate over the string and extracting substrings of 4 characters at a time.

    Here’s code to achieve your result:

    let list = "abcdefghijklmnop";
let resultArray = [];

for (let i = 0; i < list.length; i += 4) {
  let chunk = list.substring(i, i + 4);
  resultArray.push(chunk);
}

console.log(resultArray);

    Output:

    [ 'abcd', 'efgh', 'ijkl', 'mnop' ]
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  2. 0

    You could take a regular expression which searches for four characters.

    const
    list = "abcdefghijklmnop",
    parts = list.match(/.{4}/g);

console.log(parts);
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