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 :

# 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"

Output :

String Scanner peek form : Mon

String Scanner peek form : Mon Se

String Scanner peek form : Mon Sep 1

Example #2 :

# 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"

Output :

String Scanner peek form : he

String Scanner peek form : hell

String Scanner peek form : hellogee