Little tricks: string padding in Javascript » dev.enekoalonso.com - having fun with code

Little tricks: string padding in Javascript

Written by Eneko Alonso on July 20, 2010 — 3 Comments

I just found this little trick to zero pad numbers in Javascript. It is also applicable to padding with any character, not just zeros.

var n = 123
String("00000" + n).slice(-5); // returns 00123
("00000" + n).slice(-5); // returns 00123
(" " + n).slice(-5); // returns " 123" (with two spaces)

Found here.

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Posted in uncategorized | Tagged javascript, number, pad, padding, string, zeropad

2 Comments to “Little tricks: string padding in Javascript”

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Pau Sanchez

July 27, 2010 at 07:18 | Permalink

Wow!! Amazing solution! Simple and clean!
Firnaz

July 7, 2011 at 02:26 | Permalink

Thanks. So helpful

By on July 30, 2010 at 09:08

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