diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/array/access.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/array/access.rb | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/access.rb b/activesupport/lib/active_support/core_ext/array/access.rb index a8f9dddae5..45b89d2705 100644 --- a/activesupport/lib/active_support/core_ext/array/access.rb +++ b/activesupport/lib/active_support/core_ext/array/access.rb @@ -5,6 +5,8 @@ class Array # %w( a b c d ).from(2) # => ["c", "d"] # %w( a b c d ).from(10) # => [] # %w().from(0) # => [] + # %w( a b c d ).from(-2) # => ["c", "d"] + # %w( a b c ).from(-10) # => [] def from(position) self[position, length] || [] end @@ -15,39 +17,47 @@ class Array # %w( a b c d ).to(2) # => ["a", "b", "c"] # %w( a b c d ).to(10) # => ["a", "b", "c", "d"] # %w().to(0) # => [] + # %w( a b c d ).to(-2) # => ["a", "b", "c"] + # %w( a b c ).to(-10) # => [] def to(position) - first position + 1 + if position >= 0 + first position + 1 + else + self[0..position] + end end # Equal to <tt>self[1]</tt>. # - # %w( a b c d e).second # => "b" + # %w( a b c d e ).second # => "b" def second self[1] end # Equal to <tt>self[2]</tt>. # - # %w( a b c d e).third # => "c" + # %w( a b c d e ).third # => "c" def third self[2] end # Equal to <tt>self[3]</tt>. # - # %w( a b c d e).fourth # => "d" + # %w( a b c d e ).fourth # => "d" def fourth self[3] end # Equal to <tt>self[4]</tt>. # - # %w( a b c d e).fifth # => "e" + # %w( a b c d e ).fifth # => "e" def fifth self[4] end # Equal to <tt>self[41]</tt>. Also known as accessing "the reddit". + # + # (1..42).to_a.forty_two # => 42 def forty_two self[41] end |