StringScanner#unscan() : unscan() is a StringScanner class method which set the scan pointer to the previous position
Syntax: StringScanner.unscan()
Parameter: StringScanner values
Return: set the scan pointer to the previous position
Example #1 :
# Ruby code for StringScanner.unscan() method # loading StringScanner require 'strscan'
# declaring StringScanner c = StringScanner.new("Mon Sep 12 2018 14:39")
c.scan(/\w+/) # unscan() method puts "String Scanner unscan form : #{c.unscan()}\n\n"
c.scan(/./) # unscan() method puts "String Scanner unscan form : #{c.unscan()}\n\n"
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Output :
String Scanner unscan form : # String Scanner unscan form : #
Example #2 :
# Ruby code for StringScanner.unscan() method # loading StringScanner require 'strscan'
# declaring StringScanner c = StringScanner.new("h ello geeks")
c.scan(/\w+/) # unscan() method puts "String Scanner unscan form : #{c.unscan()}\n\n"
c.scan(/./) # unscan() method puts "String Scanner unscan form : #{c.unscan()}\n\n"
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Output :
String Scanner unscan form : # String Scanner unscan form : #
Note :
The output may vary because of the different Enumerators or pointer value based on you system.