Find index in an array : find_index « Array « Ruby

1. Ruby
2. Array
3. find_index

Find index in an array

data = [[1,2], [0,1], [7,8]]
data.find_index {|x| x.include? 1} # => 0: the first element matches
data.find_index {|x| x.include? 3} # => nil: no such element

 

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