Sha256: d2e843f3c53e9e860f24989ffeee301d1a4de3218661eee82c2c4c60453d0ec0
Contents?: true
Size: 936 Bytes
Versions: 47
Compression:
Stored size: 936 Bytes
Contents
unless Enumerable.method_defined? :slice_before
require 'backports/tools/arguments'
require 'backports/1.9.1/enumerator/new'
module Enumerable
def slice_before(arg = Backports::Undefined, &block)
if block_given?
has_init = !(arg.equal? Backports::Undefined)
else
raise ArgumentError, "wrong number of arguments (0 for 1)" if arg.equal? Backports::Undefined
block = Proc.new{|elem| arg === elem }
end
Enumerator.new do |yielder|
init = arg.dup if has_init
accumulator = nil
each do |elem|
start_new = has_init ? block.call(elem, init) : block.call(elem)
if start_new
yielder.yield accumulator if accumulator
accumulator = [elem]
else
accumulator ||= []
accumulator << elem
end
end
yielder.yield accumulator if accumulator
end
end
end
end
Version data entries
47 entries across 47 versions & 4 rubygems