Find substring with Jquery?

Question

How would our group find out if a particular string contain the scertain substring? Only with the help of Jquery, please.

Answer 1

You don't really need jQuery for such a simple thing, you can simply use the indexOf method of String objects, e.g.:

var str = "foobar";
var containsFoo = str.indexOf('foo') >= 0; // true

The indexOf method returns the character index where the first occurrence of the specified value is encountered, if not found, it returns -1.

Answer 2

If your limited to jQuery which is just JavaScript... you can use the filter

var subgtSel = $("#jquerySelector").filter(function(i) {
    // do your filter here
    return $(this).attr("data-timestamp") <= subMsg.CreateDateTimeStamp;
});

the subgtSel becomes your new jQuery now with the relevant filter in the above. In the above, I am looking for all div elements that have an attribute that is less than the subMsg.CreateTimeStamp.

If your looking for a particular substring... you can do the following with jQuery right in the selector

var sel = $("#jquerySelector:contains('text')");

see http://api.jquery.com/contains-selector/

Answer 3

Why use 10 characters when 100 will do?

Here's the requested jQuery plugin:

jQuery.isSubstring = function(haystack, needle) {
    return haystack.indexOf(needle) !== -1;
};

Usage:

$.isSubstring("hello world", "world")); // true;​​​​​​​​​​​