PHP functions to jQuery functions

Question

I have this script in PHP

// To prevent complications using scientific numbers less than 0 ex 7.2341232E-23
if (false !== ($cal = strpos($a, 'E-'))) { $a = 0; }

// Split $a so we only get the numbers before '.'
if (false !== ($cal = strpos($a, '.'))) { $a = substr($a, 0, $cal); }

I would like to know a simple way to make the same function in jQuery.. Any Ideas?

I did what you said... but before I go through and finish the rest of the script could you please tell me if this is right?

var a1 = a.indexOf("E-");
if (a1) { a = 0; }

var a2 = a.indexOf(".");
if (a2) { Math.floor(a); }

EDIT: I have now created a JS Fiddle that contains the script I have created based on your help.. thank you very much.. unfortunately something doesn't seem to work right.. Can Anybody please take a look at it, and tell me what is wrong?

What have you tried? I think those are quite easy transformation even using vanilla JavaScript. — Sirko
– Sirko, Commented Feb 2, 2013 at 16:30
I haven't tried anything, cause I couldn't find anything jQuery relating to strpos. — Corfitz.
– Corfitz., Commented Feb 2, 2013 at 16:31
That's because in vanilla JavaScript there is already a String.indexOf() method. — Sirko
– Sirko, Commented Feb 2, 2013 at 16:33
@PhilipJensBramsted That's because jQuery is mostly a replacement for the DOM. It's not intended as a replacement of all of JavaScript. — anon
– anon, Commented Feb 2, 2013 at 16:34
I used to say "java != javascript". Now I'll have to start saying "jQuery != javascript". — John Dvorak
– John Dvorak, Commented Feb 2, 2013 at 16:36

Community · Accepted Answer · 2017-05-23 12:27:01Z

0

A function in my toolkit might help you out,

function strpos (haystack, needle, offset) {
// http://kevin.vanzonneveld.net
// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// +   improved by: Onno Marsman
// +   bugfixed by: Daniel Esteban
// +   improved by: Brett Zamir (http://brett-zamir.me)
// *     example 1: strpos('Kevin van Zonneveld', 'e', 5);
// *     returns 1: 14
var i = (haystack + '').indexOf(needle, (offset || 0));
return i === -1 ? false : i;
}

Or if you want to use jQuery selectors this answer might help you

jQuery or JavaScript equivalent of PHP strpos function to find string on a page

edited May 23, 2017 at 12:27

CommunityBot

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answered Feb 2, 2013 at 16:37

Charles Denault

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Comments

Corfitz. · Accepted Answer · 2013-02-04 12:58:38Z

0

It is very simple.. just use this:

a = Math.floor(a);

edited Feb 4, 2013 at 12:58

answered Feb 2, 2013 at 18:08

Corfitz.

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