instance method
blank?
Ruby on Rails 5.0.7.2
Since v3.1.12Signature
blank?()A string is blank if it’s empty or contains whitespaces only:
''.blank? # => true
' '.blank? # => true
"\t\n\r".blank? # => true
' blah '.blank? # => false
Unicode whitespace is supported:
"\u00a0".blank? # => true
@return [true, false]
Source
# File activesupport/lib/active_support/core_ext/object/blank.rb, line 114
def blank?
# The regexp that matches blank strings is expensive. For the case of empty
# strings we can speed up this method (~3.5x) with an empty? call. The
# penalty for the rest of strings is marginal.
empty? || BLANK_RE === self
end
Defined in activesupport/lib/active_support/core_ext/object/blank.rb line 114
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Defined in String