Ruby | Array shift() function
Last Updated :
06 Dec, 2019
Array#shift() : shift() is a Array class method which removes the first element of self and returns it or nil if the array is empty.
Syntax: Array.shift()
Parameter: Array
Return: removes the first element of self and returns it or nil if the array is empty.
Example #1 :
a = [ 18 , 22 , 33 , nil , 5 , 6 ]
b = [ 1 , 4 , 1 , 1 , 88 , 9 ]
c = [ 18 , 22 , 50 , 6 ]
puts "shift() method form : #{a.shift()}\n\n"
puts "shift() method form : #{b.shift(2)}\n\n"
puts "shift() method form : #{c.shift(3)}\n\n"
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Output :
shift() method form : 18
shift() method form : [1, 4]
shift() method form : [18, 22, 50]
Example #2 :
a = [ "abc" , "nil" , "dog" ]
c = [ "cat" , nil ]
b = [ "cow" , nil , "dog" ]
puts "shift() method form : #{a.shift()}\n\n"
puts "shift() method form : #{b.shift()}\n\n"
puts "shift() method form : #{c.shift()}\n\n"
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Output :
shift() method form : abc
shift() method form : cow
shift() method form : cat
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