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isnumeric

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Aug 04.2003

Hi,
Is there a method like isnumeric to control a text value?
Thanks in advance,
Salim

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JavaScript

5 Comments(s) ↴

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@CharlesAug 04.2003 — [font=monospace]<script type="text/javascript">

<!--

String.prototype.isNumeric = function () {return !isNaN(this)}

alert ('foo'.isNumeric());

alert (Math.PI.toString().isNumeric());

// -->

</script>[/font]
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@GollumAug 04.2003 — you could call parseInt and test if the number is a number

e.g.
<i>
</i>var s = "12345";
if ( !parseInt(s).isNaN() ) alert("'" + s "' is a number");
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@CharlesAug 04.2003 — [i]Originally posted by Gollum [/i]

[B]you could call parseInt and test if the number is a number

e.g.

<i>
</i>var s = "12345";
if ( !parseInt(s).isNaN() ) alert("'" + s "' is a number");
 [/B][/QUOTE][font=georgia]I suppose you could, but you would find that it doesn't work.[/font]
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@kyle969Aug 04.2003 — function isDigit(c){

return((c >= "0") && (c <= "9"))

}

function isInteger(s){
var c, i;
for(i = 0; i < 5; i++)
if(!isDigit(s.charAt(i))) return false;
return true;
}
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@GollumAug 04.2003 — Ahh, thankyou Charles for spotting my mistake. I guess I deserve it for not checking the code before I posted.

I like your solution though. Neat and concise.
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