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Diffstat (limited to 'ruby.html.markdown')
| -rw-r--r-- | ruby.html.markdown | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/ruby.html.markdown b/ruby.html.markdown index 8f23b2e6..cf6bf2ce 100644 --- a/ruby.html.markdown +++ b/ruby.html.markdown @@ -269,6 +269,19 @@ end #=> iteration 4 #=> iteration 5 +# There are a bunch of other helpful looping functions in Ruby, +# for example "map", "reduce", "inject", the list goes on. Map, +# for instance, takes the array it's looping over, does something +# to it as defined in your block, and returns an entirely new array. +array = [1,2,3,4,5] +doubled = array.map do |element| + element * 2 +end +puts doubled +#=> [2,4,6,8,10] +puts array +#=> [1,2,3,4,5] + grade = 'B' case grade |