util.format() leading zeros

[Thijs Koerselman]

Is it possible to write something like this?

util.format("page_%02d", index);

The above doesn't work, and I can't find anything in the docs about leading zero's.

[Ben Noordhuis]

On Tue, Mar 27, 2012 at 14:22, Thijs Koerselman
<thijsko...@gmail.com> wrote:
> Is it possible to write something like this?
>
> util.format("page_%02d", index);

Alas, no. util.format() is intentionally as brain dead as possible.

[Mark Hahn]

I recommend underscore_string.

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[Brandon Benvie]

("0000" + someNumber).slice(-4)

[Adrian Lynch]

Wrapped in a function and accounting for the number being longer than the mask:

function numFmt(num, mask) {

return (mask + num).slice(-Math.max(mask.length, (num + "").length));

};

Thanks Brandon, 2 1/2 years later :P

Adrian

On Thursday, 29 March 2012 12:39:33 UTC+1, Brandon Benvie wrote:

("0000" + someNumber).slice(-4)