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Contents
# http://snippets.dzone.com/posts/show/5119
class Array
def map_with_index!
each_with_index do |e, idx| self[idx] = yield(e, idx); end
end
def map_with_index(&block)
dup.map_with_index!(&block)
end
end
# TODO move this to cursor <-> use cursor for calculations
class Array
def between?(a,b)
self.>= a and self.<= b
end
def <(other)
(self.<=>other) == -1
end
def <=(other)
self.<(other) or self.==other
end
def >(other)
(self.<=>other) == 1
end
def >=(other)
self.>(other) or self.==other
end
end
# http://madeofcode.com/posts/74-ruby-core-extension-array-sum
class Array
def sum(method = nil, &block)
if block_given?
raise ArgumentError, "You cannot pass a block and a method!" if method
inject(0) { |sum, i| sum + yield(i) }
elsif method
inject(0) { |sum, i| sum + i.send(method) }
else
inject(0) { |sum, i| sum + i }
end
end
end
Version data entries
67 entries across 67 versions & 1 rubygems