Ruby | StringScanner peek function

StringScanner#peek() : peek() is a StringScanner class method which returns a string corresponding to string[pos, len].

Syntax: StringScanner.peek()

Parameter: StringScanner values
len – length of the string value

Return: a string corresponding to string[pos, len]

Example #1 :



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# Ruby code for StringScanner.peek() method
  
# loading StringScanner
require 'strscan'
  
# declaring StringScanner 
c = StringScanner.new("Mon Sep 12 2018 14:39")
  
# peek() method
puts "String Scanner peek form : #{c.peek(3)}\n\n"
  
# peek() method
puts "String Scanner peek form : #{c.peek(6)}\n\n"
  
# peek() method
puts "String Scanner peek form : #{c.peek(9)}\n\n"

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Output :

String Scanner peek form : Mon

String Scanner peek form : Mon Se

String Scanner peek form : Mon Sep 1

Example #2 :

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# Ruby code for StringScanner.peek() method
  
# loading StringScanner
require 'strscan'
  
# declaring StringScanner 
c = StringScanner.new("hellogeeks")
  
# peek() method
puts "String Scanner peek form : #{c.peek(2)}\n\n"
  
# peek() method
puts "String Scanner peek form : #{c.peek(4)}\n\n"
  
# peek() method
puts "String Scanner peek form : #{c.peek(8)}\n\n"

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Output :

String Scanner peek form : he

String Scanner peek form : hell

String Scanner peek form : hellogee

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