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There are some special ways to select elements using jQuery. Below we can see some examples.

var elements1 = $('div:contains("computer")');      // Select all div elements which contains the text "computer". It is case sensitive
var elements2 = $('tr:odd');                        // Select all the odd tr (1, 3, 5, etc). Index is 0 based. The first row in table is 0
var elements3 = $('tr:even');                       // Select all the even tr (0, 2, 6, etc). Index is 0 based. The first row in table is 0
var element4 = $('span:first-child');               // Select the first span child of every element group
var element5 = $('span:last-child');                // Select the last span child of every element group