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Versions: 24
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Contents
class Object
#
# Default "integer?" behaviour.
#
def integer?; false; end
#
# Default "float?" behaviour.
#
def float?; false; end
#
# Default "number?" behaviour.
#
def number?; false; end
#
# `truthy?` means `not blank?`
#
def truthy?
if respond_to? :blank?
not blank?
else
not nil?
end
end
end
class TrueClass
def truthy?; true; end
end
class FalseClass
def truthy?; false; end
end
class Numeric
def truthy?; self > 0; end
def number?; true; end
end
class Integer
#
# 'true' if the integer is 0
#
def blank?; self == 0; end
def integer?; true; end
end
class Float
#
# 'true' if the float is 0.0
#
def blank?; self == 0.0; end
def float?; true; end
end
class NilClass
#
# Always 'true'; nil is considered blank.
#
def blank?; true; end
end
class Symbol
#
# Symbols are never blank.
#
def blank?; false; end
end
class String
#
# Could this string be cast to an integer?
#
def integer?
!!strip.match(/^-?\d+$/)
end
#
# Could this string be cast to an float?
#
def float?
!!strip.match(/^-?\d+\.\d+$/)
end
#
# Could this string be cast to an number?
#
def number?
!!strip.match(/^-?\d\.?\d*$/)
end
#
# 'true' if the string's length is 0 (after whitespace has been stripped from the ends)
#
def blank?
strip.size == 0
end
#
# Is there anything in the string? (ignoring whitespace/newlines)
#
def any?
not blank?
end
alias_method :present?, :any?
#
# Does this string contain something that means roughly "true"?
#
def truthy?
case strip.downcase
when "1", "true", "yes", "on", "enabled", "affirmative"
true
else
false
end
end
end
Version data entries
24 entries across 24 versions & 1 rubygems