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Contents
# TITLE:
#
# Symbol Generation
#
# DESCRIPTION:
#
# Symbol generation extensions.
#
# AUTHORS:
#
# CREDIT Thomas Sawyer
#
# NOTES:
#
# TODO Is Symbol#chomp worth having? Are the any other
# String methods that Symbols really should have too?
#
class Symbol
# Easily manipulate undercores on symbols.
#
# :a.pad(2) #=> :__a__
# :__a__.pad(-1) #=> :_a_
#
def shadow(i=1)
return self if i == 0
s = self.to_s
if i > 0
return ( ('_'*i) + self.to_s + ('_'*i) ).to_sym
else
i *= -1
return s[i..-i-1].to_sym if s[0..i-1] == ('_'*i) and s[-i..-1] == ('_'*i)
return self
end
end
alias :pad :shadow
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TestSymbol < Test::Unit::TestCase
def test_shadow
assert_equal( :__a__, :a.shadow(2) )
assert_equal( :_a_, :__a__.shadow(-1) )
end
end
=end
Version data entries
10 entries across 10 versions & 1 rubygems