search a string in javascript

Question

Possible Duplicate:
JavaScript: string contains

I want to search a string in javascript to see if it contain some characters

<script type="text/javascript">
var s="hello world";
if(s.contains("hello")) alert("contains");
</script>

I may expect a function like string.contains() . Is their a string.contains in javascript or should i use indexOf instead

http://stackoverflow.com/questions/1789945/javascript-string-contains duplicate — VirtualTroll, Aug 29 '12 at 12:29
this has been asked many times before, you should search for it before asking a question — jbabey, Aug 29 '12 at 12:29

score 1 · Answer 1 · answered Aug 29 '12 at 12:30

If you really want a contains:

String.prototype.contains = function (searchTerm) {
    return this.toString().indexOf(searchTerm) !== -1;
};

If you're feeling fancy:

String.prototype.contains = function (searchTerm) {
    return ~this.toString().indexOf(searchTerm);
};

score 0 · Answer 2 · answered Aug 29 '12 at 12:28

0

indexOf is the way to go - just check the return value.

answered Aug 29 '12 at 12:28

Dhaivat Pandya

score 0 · Answer 3 · answered Aug 29 '12 at 12:29

0

Try regEx:

if( /hello/.test(s) )
    alert("contains");

answered Aug 29 '12 at 12:29

David Hellsing

score 0 · Answer 4 · answered Aug 29 '12 at 12:30

0

s.indexOf('hello') > -1

s.match('hello') === true

(docs, Be aware, that 'hello' will be interpreted as regular expression in this case.)

answered Aug 29 '12 at 12:30

Boldewyn

4 Answers4