/ Ruby
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method

pop

v1_8_6_287 - Show latest stable - Class: Array
pop()
public

Removes the last element from self and returns it, or nil if the array is empty. 

   a = [ "a", "m", "z" ]
   a.pop   #=> "z"
   a       #=> ["a", "m"]

2Notes

Pop for last, Shift for first

Ariejan · Nov 18, 20089 thanks

If you want to pop the first element instead of the last one, use shift .

Using argument version in ruby < 1.8.7

Mange · Oct 5, 20091 thank

The argument to this method was added in Ruby 1.8.7. If you want to use this form in an earlier version, you must instead use the slice! method.

It is mentioned up in the docs, but here it is again for reference:

# Ruby >= 1.8.7
p = list.pop(n)

# Ruby < 1.8.7
p = list.slice!(-n, n)