jQuery equivalent to Prototype array last

Question

Prototype   var array    1 2 3 4   var lastEl   array last      Anything similar to this in jQuery

User · Answer

According to jsPerf  Last item method  the most performant method is array array length-1   The graph is displaying operations per second  not time per operation    It is common  but wrong  for developers to think the performance of a single operation matters  It does not  Performance only matters when you re doing LOTS of the same operation  In that case  using a static value  length  to access a specific index  length-1  is fastest  and it s not even close

User · Answer

Why not use the get function   var a    1 2 3 4   var last     a  get -1     http   api jquery com get  More info  Edit   As pointed out by DelightedD0D  this isn t the correct function to use as per jQuery s docs but it does still provide the correct results  I recommend using Salty s answer to keep your code correct

User · Answer

I use this    array reverse   0   You reverse the array with reverse   and then pick the first item of the reversed version with  0   that is the last one of the original array   You can use this code if you don t care that the array gets reversed of course  because it will remain so

User · Answer

Why not just use simple javascript   var array  1 2 3 4   var lastEl   array array length-1     You can write it as a method too  if you like  assuming prototype has not been included on your page    Array prototype last   function    return this this length-1

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See these test cases http   jsperf com last-item-method The most effective way is throug  pop method  in V8   but loses the last element of the array

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with slice     var a    1 2 3 4   var lastEl   a slice -1  0      4    a is still  1 2 3 4    with pop     var a    1 2 3 4   var lastEl   a pop       4    a is now  1 2 3    see https   developer mozilla org en JavaScript Reference Global Objects Array for more information

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url   www mydomain com user1 1234    params   window location href split         params   params length-1    You can split based on your query string separator

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I know the answer is already given  but I think I ve got another solution for this  You could take the array  reverse it and output the first array item like this   var a    1 2 3 4   var lastItem   a reverse   0    Works fine for me

User · Answer

When dealing with a jQuery object   last   will do just that  filter the matched elements to only the last one in the set   Of course  you can wrap a native array with jQuery leading to this   var a    1 2 3 4   var lastEl     a  last   0

User · Answer

SugarJS  It s not jQuery but another library you may find useful in addition to jQuery  Try SugarJS      Sugar is a Javascript library that extends native objects with helpful methods  It is designed to be intuitive  unobtrusive  and let you do more with less code    With SugarJS  you can do    1 2 3 4  last            gt  4   That means  your example does work out of the box   var array    1 2 3 4   var lastEl   array last             gt  4   More Info   SugarJS Homepage Feature Overview All about arrays in SugarJS

User · Answer

If u use the prototype on arrays like   Array prototype last   function    return this this length-1      using forloops will do this   var a    0 1 2   out -- gt  0 out -- gt  1 out -- gt  2 out -- gt  last

User · Answer

For arrays  you could simply retrieve the last element position with array length - 1   var a    1 2 3 4    var lastEl   a a length-1      4   In jQuery you have the  last selector  but this won t help you on plain arrays

[jquery] jQuery equivalent to Prototype array.last()

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