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Say I have an array. I wish to pass the array to a function. The function, however, expects two arguments. Is there a way to on the fly convert the array into 2 arguments? For example:

a=[0,1,2,3,4]
b=[2,3]
a.slice(b)

Would yield an error in Ruby. I need to input a.slice(b[0],b[1]) I am looking for something more elegant, as in a.slice(foo.bar(b)) Thanks.

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2 Answers

up vote 7 down vote

Use this

a.slice(*b)

It's called the splat operator

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+1: Gaargh! I'm too slow. –  Johnsyweb Feb 19 at 13:47
up vote 4 down vote

Using the splat operator:

irb(main):001:0> def fn a, b
irb(main):002:1>   a.to_int + b.to_int
irb(main):003:1> end
=> nil
irb(main):004:0> c = [1, 2]
=> [1, 2]
irb(main):005:0> fn *c
=> 3
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Yes!That's perfect. :) –  Arup Rakshit Feb 19 at 15:33

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