Method: String#block_scanf

Defined in:

lib/scanf.rb

#block_scanf(fstr) ⇒ Object

Scans the current string until the match is exhausted yielding each match as it is encountered in the string. A block is not necessary as the results will simply be aggregated into the final array.

"123 456".block_scanf("%d")
# => [123, 456]

If a block is given, the value from that is returned from the yield is added to an output array.

"123 456".block_scanf("%d) do |digit,| # the ',' unpacks the Array
  digit + 100
end
# => [223, 556]

See Scanf for details on creating a format string.

You will need to require ‘scanf’ to use String#block_scanf

# File 'lib/scanf.rb', line 753

def block_scanf(fstr) #:yield: current_match
  fs = Scanf::FormatString.new(fstr)
  str = self.dup
  final = []
  begin
    current = str.scanf(fs)
    final.push(yield(current)) unless current.empty?
    str = fs.string_left
  end until current.empty? || str.empty?
  return final
end