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End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Method#[]

[](*args)

Alias of #call

Invokes the meth with the specified arguments, returning the method’s return value.

Example
m = 12.method("+")
m.call(3)    #=> 15
m.call(20)   #=> 32
See also #call #>> #arity #=== also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0