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Versions: 11
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Contents
module Ext
module Array
module ShiftWhile
refine ::Array do
# The algorithm ensures that the block sees the array as if the current
# element has already been removed
def shift_while(&block)
r = []
while value = self.shift
if !block.call(value)
self.unshift value
break
else
r << value
end
end
r
end
end
end
module PopWhile
refine ::Array do
# The algorithm ensures that the block sees the array as if the current
# element has already been removed
def pop_while(&block)
r = []
while value = self.pop
if !block.call(value)
self.push value
break
else
r << value
end
end
r
end
end
end
module Wrap
refine ::Array do
# Concatenate strings into lines that are at most +width+ characters wide
def wrap(width, curr = 0)
lines = [[]]
curr -= 1 # Simplifies conditions below
each { |word|
if curr + 1 + word.size <= width
lines.last << word
curr += 1 + word.size
else
lines << [word]
curr = word.size
end
}
lines.map! { |words| words.join(" ") }
end
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems