$("selector").slice(start, end) slices matched set into subset specified by start and optional end.
Example 1: $("div").slice(0,1) will first find all <div> then slice the mathced set into subset starting from element at index=0 and ending "but NOT including" elment at index=1.
<div>A</div> // index = 0 <div>B</div> // index = 1 <div>C</div>
Matched set is a set of elements matching selector. For example, in Example 1 matchted set is set of elements matching $("div") selector
<p>p-1</p> <div id='someID'>div-1</div> //index = 0 <div class='someClass'>div-2</div> //index = 1 <div>div-3</div> //index = 2 <span>span-1</span>
Example 2: $("div").slice(1) will first find all <div> then slice the mathced set into subset starting from element at index=1 to the last element.
<div>A</div> // index = 0 <div>B</div> // index = 1 <div>C</div> // index = 2
Example 3: $("div").slice(-2) will first find all <div> then slice the mathced set into subset starting from element at index=-2 "second element from the last" to the last element.
<div>A</div> // index = 0 & index = -3 from last <div>B</div> // index = 1 & index = -2 from last <div>C</div> // index = 2 & index = -1 from last