Question

I would like to split a string into fixed-length (N, for example) pieces. Of course, last piece could be shorter, if original string’s length is not multiple of N.

I need the fastest method to do it, but also the simplest to write. The way I have been doing it until now is the following:

var a = 'aaaabbbbccccee';
var b = [];
for(var i = 4; i < a.length; i += 4){ // length 4, for example
    b.push(a.slice(i-4, i));
}
b.push(a.slice(a.length - (4 - a.length % 4))); // last fragment

I think there must be a better way to do what I want. But I don’t want extra modules or libraries, just simple JavaScript if it’s possible.

Before ask, I have seen some solutions to resolve this problem using other languages, but they are not designed with JavaScript in mind.

Answer 1

You can try this:

var a = 'aaaabbbbccccee';
var b = a.match(/(.{1,4})/g);