Ruby | StringScanner check_until function

StringScanner#check_until() : check_until() is a StringScanner class method which returns the value that scan_until would return, without advancing the scan pointer.

Syntax: StringScanner.check_until()

Parameter: StringScanner values

Return: the value that scan_until would return, without advancing the scan pointer.

Example #1 :

# Ruby code for StringIO.check_until() method

# loading StringIO
require 'strscan'

# declaring StringIO
c = StringScanner.new("Fri Dec 12 1975 14:39")

# check_until() method
puts "String Scanner check_until form : #{c.check_until /1975/}\n\n"

Output :

String Scanner check_until form : Fri Dec 12 1975

Example #2 :

# Ruby code for StringIO.check_until() method

# loading StringIO
require 'strscan'

# declaring StringIO
c = StringScanner.new("hellogeeks")

# check_until() method
puts "String Scanner check_until form : #{c.check_until /ge/}\n\n"

Output :

String Scanner check_until form : helloge