How to use regex to match substring via group repeatedly in JavaScript?

Question

For example, I have a string:

var s = "ABCDEFGHIJKLMN";

I would like to get an array of substrings whose length is 1 to 5.

The result I expect is:

["ABCDE", "FGHIJ", "KLMN"]

I tried to get the result via regexp. Here is my code:

var s = "ABCDEFGHIJKLMN";
var result = s.match(/(.{1,5})+/)

But I can only get the last match of the group instead of all of them:

result[1];
"KLMN"

Jack Bashford · Accepted Answer · 2019-06-27 02:38:53Z

2

Use split with a capturing group, and remove the empty strings:

var s = "ABCDEFGHIJKLMN";
var result = s.split(/(.{1,5})/).filter(e => e);
console.log(result);

answered Jun 27, 2019 at 2:38

Jack Bashford

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2 Comments

Didn't know split() function can accept regexp as argument. Thanks!

No problem @krave, always glad to help.

Pinetree · Accepted Answer · 2019-06-27 02:50:36Z

1

Add a "g" to the end of the pattern:

var s = "ABCDEFGHIJKLMN";
var result = s.match(/.{1,5}/g)
console.log(result)

answered Jun 27, 2019 at 2:50

Pinetree

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