Pro PHP and jQuery by Jason Lengstorf.pdf - Computer Science ...

CHAPTER 2 ■ COMMON JQUERY ACTIONS AND METHODS
Additionally, like with .eq(), a negative index can be used. This can be applied to the start and/or
end point.
To select all paragraphs and then limit the selection to the second and third paragraphs, use the
following code:
$("p").slice(1,3);
The result in the console reads as follows:
>>> $("p").slice(1,3);
[ p.foo, p ]
To select the last two elements from the paragraph set, you would use the following:
$("p").slice(-2);
This generates the following result:
>>> $("p").slice(-2);
[ p, p#bar ]
.children()
Oftentimes, it becomes necessary to drill down in a result set to find child elements. This is
accomplished using the .children() method, which accepts one optional parameter: a selector to match
child elements against.
To select all paragraphs and then change the selection to match all child elements of the
paragraphs, execute the following code:
$("p").children();
This outputs the following:
>>> $("p").children();
[ span, span.foo ]
If you need a more specific set of children than that, you’re able to pass an optional selector to the
.children() method. To select all paragraphs and then find all children with a class foo, use the
following:
$("p").children(".foo");
The results in the console are as follows:
>>> $("p").children(".foo");
29