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# Sometimes I wish Array#map would take an argument for the index | |
# I usually think about it when I'm working with a CSV file | |
class Array | |
def map(arg=nil, &block) | |
if arg && block_given? | |
self.map(arg).map(&block) | |
elsif arg | |
self.map {|x| x[arg]} | |
else | |
super() | |
end | |
end | |
end |
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