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Contents
class String
# Interpret common affirmative string meanings as true,
# otherwise false. Balnk sapce and case are ignored.
# The following strings that will return true:
#
# <tt>true</tt>,<tt>yes</tt>,<tt>on</tt>,<tt>t</tt>,<tt>1</tt>,<tt>y</tt>,<tt>==</tt>
#
# Examples:
#
# "true".to_b #=> true
# "yes".to_b #=> true
# "no".to_b #=> false
# "123".to_b #=> false
#
def to_b
case self.downcase.strip
when 'true', 'yes', 'on', 't', '1', 'y', '=='
return true
when 'nil', 'null'
return nil
else
return false
end
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCString < Test::Unit::TestCase
def test_to_b
assert( 'true'.to_b )
assert( 'True'.to_b )
assert( 'yes'.to_b )
assert( 'YES'.to_b )
assert( 'on'.to_b )
assert( 'ON'.to_b )
assert( 't'.to_b )
assert( '1'.to_b )
assert( 'y'.to_b )
assert( 'Y'.to_b )
assert( '=='.to_b )
assert( ! 'nil'.to_b )
assert( ! 'false'.to_b )
assert( ! 'blahblahtrueblah'.to_b )
assert_equal( nil, 'nil'.to_b )
assert_equal( nil, 'null'.to_b )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems