Class: String
- Inherits:
-
Object
- Object
- String
- Defined in:
- lib/scanf.rb
Instance Method Summary collapse
-
#block_scanf(fstr) ⇒ Object
Scans the current string until the match is exhausted yielding each match as it is encountered in the string.
-
#scanf(fstr, &b) ⇒ Object
Scans the current string.
Instance Method Details
#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
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# 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 |
#scanf(fstr, &b) ⇒ Object
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 String#scanf
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# File 'lib/scanf.rb', line 720 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 |