enum.find_index(value) â int or nil
enum.find_index { |obj| block } â int or nil
enum.find_index â an_enumerator
enum.find_index { |obj| block } â int or nil
enum.find_index â an_enumerator
Instance Public methods
Compares each entry in enum with value or passes to
block. Returns the index for the first for which the evaluated
value is non-false. If no object matches, returns nil
If neither block nor argument is given, an enumerator is returned instead.
1 2 3 | (1..10).find_index { |i| i % 5 == 0 and i % 7 == 0 } #=> nil(1..100).find_index { |i| i % 5 == 0 and i % 7 == 0 } #=> 34(1..100).find_index(50) #=> 49 |
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