strpos - Javascript

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strpos in javascript

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Find the occurrence of a string using strpos in javascript.

function strpos (haystack, needle, offset) {
var i = (haystack '').indexOf(needle, (offset || 0));
return i === -1 ? false : i;
}

call the function as,

var res='scripts,tutorials,tools';
strpos(res, ',');

result will be,
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