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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 #block_scanf
# File scanf.rb, line 748 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
Scans the current string. If a block is given, it functions exactly like block_scanf.
arr = "123 456".scanf("%d%d") # => [123, 456] require 'pp' "this 123 read that 456 other".scanf("%s%d%s") {|m| pp m} # ["this", 123, "read"] # ["that", 456, "other"] # => [["this", 123, "read"], ["that", 456, "other"]]
See Scanf for details on creating a format string.
You will need to require ‘scanf’ to use #scanf
# File scanf.rb, line 715 def scanf(fstr,&b) #:yield: current_match if b block_scanf(fstr,&b) else fs = if fstr.is_a? Scanf::FormatString fstr else Scanf::FormatString.new(fstr) end fs.match(self) end end