I’ve had some people tell me that they didn’t know about the splat operator in Ruby (*array) so here’s a quick example of how it’s used.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | > array = [:a, :b, :c] [ [0] :a, [1] :b, [2] :c ] >> a, b, c = *array [ [0] :a, [1] :b, [2] :c ] >> a :a >> b :b >> c :c |
It splits the elements of the array into single items which are returned as a group (I think they are called parameters). So in second statement in the example above:
agets the first element ofarray,:abgets the second element ofarray,:bcgets the third element ofarray,:c
This is commonly used to set a bunch of variables or when working with a method’s arguments (e.g. in a monkey patch).
Share
No related posts.
