Flowdock
method

index

Importance_1
Ruby latest stable (v1_9_3_392) - 0 notes - Class: Matrix
index(*args) public

The index method is specialized to return the index as [row, column] It also accepts an optional selector argument, see #each for details.

Matrix[ [1,2], [3,4] ].index(&:even?) # => [0, 1]
Matrix[ [1,1], [1,1] ].index(1, :strict_lower) # => [1, 0]
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