How do you make a string act as a comparison operator?

VBGuy2112 · Feb 28, 2003

This is one for a real tekie...

I am looking to dynamically create a validation function and I want to be able to pass the function a string like "==" and have it act as a comparison operator in my function.

Is there a way to do this?

Thanks in advance!!!

onpnt · Feb 28, 2003

eval should interprute a string as == into the logical expression of *EQ

I'll give it a shot and see if thats sound though. just a thought _________________________________________________________
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[sup]

http://www.onpntwebdesigns.com

[/sup]

onpnt · Feb 28, 2003

hey VBGuy
I came up with this real quick but have to leave for a bit. possibly someone can get it working a bit more efficiently and more so dynamic as is. it should get you started though
<html>
<head>
<script>
function compOper(operator) {
var frm = document.forms[0];
var str1 = frm.elements[0].value;
var str2 = frm.elements[1].value;

//alert(eval("str1+operator+str2&quot

);
var expr = eval("str1+operator+str2&quot

if(eval(expr)) {
alert("it work, they are equal&quot

;
} else {
alert("they are not equal&quot

;

}
}
</script>
</head>

<body>
<form>
<input type="text" name="str1"><br>
<input type="text" name="str2"><br>
<input type="text" name="operator"><br>
<input type="button" value="text comparison function" onClick="compOper(document.forms[0].operator.value)">
</form>
</body>
</html>

I think it's pretty straight forward and eplains itself but if you need more explanation on what's going on in there let us know. _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

[sup]

http://www.onpntwebdesigns.com

[/sup]

VBGuy2112 · Feb 28, 2003

Thank you both for your responses. I had to change onpnt's code a little to make it work but I think I have what I need. Very cool indeed.

HellTel · Feb 28, 2003

Yes, well done both onpnt's [lol]

Hope I helped / Thanks for helping
if ((Math.abs(x)<10&&Math.abs<10) &&(((parseInt(x.toString()+y.toString())-x-y)%9)!=0)){alert("I'm a monkey's uncle"}

onpnt · Feb 28, 2003

thank you both. [smile]

and both of me [lol]

I should apologize though as I was testing integers only at that point. that's probably the adjustments you needed. I always find it easier to get what I need working with integers then change over to strings in javascript. There might be a tip in there somewhere _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

[sup]

http://www.onpntwebdesigns.com

[/sup]

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How do you make a string act as a comparison operator?

VBGuy2112

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onpnt

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onpnt

Programmer

VBGuy2112

Programmer

HellTel

Programmer

onpnt

Programmer

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