Class: String Private

Constant Summary collapse

BLANK_RE =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning.

/\A[[:space:]]*\z/

ENCODED_BLANKS_ =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning.

T.let(Hash.new do |h, enc|
  h[enc] = Regexp.new(BLANK_RE.source.encode(enc), BLANK_RE.options | Regexp::FIXEDENCODING)
end, T::Hash[Encoding, Regexp])

Instance Method Summary collapse

• #blank? ⇒ Boolean private

  A string is blank if it's empty or contains whitespaces only:.

• #exclude?(string) ⇒ Boolean private

  The inverse of String#include?.

• #present? ⇒ Boolean private

''.blank?       # => true
''.blank?    # => true
"\t\n\r".blank? # => true
' blah '.blank? # => false

"\u00a0".blank? # => true

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# File 'extend/blank/string.rb', line 28

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? ||
    begin
      BLANK_RE.match?(self)
    rescue Encoding::CompatibilityError
      T.must(ENCODED_BLANKS_[encoding]).match?(self)
    end
end

"hello".exclude? "lo" # => false
"hello".exclude? "ol" # => true
"hello".exclude? ?h   # => false

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# File 'extend/string.rb', line 12

def exclude?(string) = !include?(string)

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# File 'extend/blank/string.rb', line 41

def present? = !blank? # :nodoc: