Numeric#of

[Ara.T.Howard]

i end up doing this sort of thing alot:

avg, max, min = {}, {}, {}

stack_a, stack_b = [], []

and was thinking about a general syntax for 'n of these' or 'n of the result
of this block'... does this read alright?


~ > cat of.rb
class Numeric
def of
ret = []
times{|i| ret << yield(i)}
ret
end
end

them = 3.of{ Array.new }
p them # => [[],[],[]]



-a
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[Alex McHale]

I like it. I particularly like the added detail of yielding the index
into the creation, in case you need that info.

Kudos, and thanks for the snippet!

Alex McHale

 

[Bret Jolly]

~ > cat of.rb
class Numeric
def of
ret = []
times{|i| ret << yield(i)}
ret
end
end

them = 3.of{ Array.new }
p them # => [[],[],[]]

irb(main):061:0> 6.of{1} + dozen.div(2).of{'the other'}
[1, 1, 1, 1, 1, 1, "the other", "the other",
"the other", "the other", "the other", "the other"]
Heh!