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Ruby | Array class each_index() operation
  • Last Updated : 08 Jan, 2020

Array#each_index() : each_index() is a Array class method which returns the index of the array element by following the condition in the given block once for each_index element in self.

Syntax:  Array.each_index()

Parameter:  block - condition to follow

Return:  index of the array element following the condition

Code #1 : Example for each_index() method

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# Ruby code for each_index() method
  
# declaring array
a = ["abc", "nil", "dog"]
  
# declaring array
b = ["hello", "hi", "dog"]
  
# each_index
puts "each_index : #{a.each_index {|x| print x, " -- "}}\n\n"

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Output :

0 -- 1 -- 2 -- each_index : ["abc", "nil", "dog"]

Code #2 : Example for each_index() method

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# Ruby code for each_index() method
  
# declaring array
a = ["abc", "nil", "dog"]
  
# declaring array
b = ["hello", "hi", "dog"]
  
  
# each_index
puts "each_index : #{b.each_index{|x| x = 2}}\n\n"
     

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Output :

each_index : ["hello", "hi", "dog"]
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