Deprecated
This repository is deprecated.
The information below is left only as a reference.
comprehend
[1,2,3].comprehend{ |i| i.to_s if i<3 } == ["1","2"]
[{:type => :dog, :sound => "woof"},{:type => :tree}, {:type => :cat, :sound => "meow"}].comprehend do |o|
o[:sound]
end == ["woof", "meow"]Comprehend is a tiny gem that defines Array#comprehend
and Array#comprehend!. Comprehend accepts 0 arguments
and requires a block. It invokes the block for each element
of self and returns an array of all non-nil results.
comprehend(&block) is equivalent to map(&block).compact, but is slightly faster
because it only iterates once over the array. For blocks that do not modify the array
in place, the result is also equivalent to select(&block).map(&block).
Array#comprehend! comprehends the array in place. Its return value is either the modified array
or nil if no compacting was done, equivalent to map!(&block).compact!.
Usage
require "comprehend"Tested on ruby-mri 1.9.3 and 2.0.0, not compatible with lower versions.
Why "comprehend"?
Invocations of comprehend will often look like Python list comprehensions. Compare the first example above to
[str(i) for i in [1,2,3] if i<3] == ['1', '2']License
Copyright (C) 2013 Medidata Solutions Inc.
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