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author | Jeremy Kemper <jeremy@bitsweat.net> | 2009-05-20 16:49:21 -0700 |
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committer | Jeremy Kemper <jeremy@bitsweat.net> | 2009-05-20 18:12:44 -0700 |
commit | 68398838544a778244e6028f2c30deb7313ea0b2 (patch) | |
tree | d37102f36827549733ac8f241fd965003d7eedd8 /activesupport/lib/active_support/core_ext/object/tap.rb | |
parent | 429a00f225b24b938575ed40d11fa07987e12a6f (diff) | |
download | rails-68398838544a778244e6028f2c30deb7313ea0b2.tar.gz rails-68398838544a778244e6028f2c30deb7313ea0b2.tar.bz2 rails-68398838544a778244e6028f2c30deb7313ea0b2.zip |
Break up misc Object extensions
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object/tap.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/object/tap.rb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/tap.rb b/activesupport/lib/active_support/core_ext/object/tap.rb new file mode 100644 index 0000000000..db7e715e2d --- /dev/null +++ b/activesupport/lib/active_support/core_ext/object/tap.rb @@ -0,0 +1,16 @@ +class Object + # Yields <code>x</code> to the block, and then returns <code>x</code>. + # The primary purpose of this method is to "tap into" a method chain, + # in order to perform operations on intermediate results within the chain. + # + # (1..10).tap { |x| puts "original: #{x.inspect}" }.to_a. + # tap { |x| puts "array: #{x.inspect}" }. + # select { |x| x%2 == 0 }. + # tap { |x| puts "evens: #{x.inspect}" }. + # map { |x| x*x }. + # tap { |x| puts "squares: #{x.inspect}" } + def tap + yield self + self + end unless Object.respond_to?(:tap) +end |