Ruby StringScanner restsize函数

StringScanner#restsize() : restsize()是StringScanner类的一个方法，用于返回字符串位置后的字节大小。

语法。StringScanner.restsize()

参数。StringScanner的值

返回：字符串位置之后的字节的大小。

例子 #1 :

# Ruby code for StringScanner.restsize() method
  
# loading StringScanner
require 'strscan'
  
# declaring StringScanner 
c = StringScanner.new("Mon Sep 12 2018 14:39")
  
# restsize() method
c.pos = 2
puts "String Scanner restsize form : #{c.restsize}\n\n"
  
# restsize() method
c.pos = 7
puts "String Scanner restsize form : #{c.restsize}\n\n"

输出:

String Scanner restsize form : 19

String Scanner restsize form : 14

例子 #2 :

# Ruby code for StringScanner.restsize() method
  
# loading StringScanner
require 'strscan'
  
# declaring StringScanner 
c = StringScanner.new("hellogeeks")
  
# restsize() method
c.pos = 2
puts "String Scanner restsize form : #{c.restsize}\n\n"
  
# restsize() method
c.pos = 7
puts "String Scanner restsize form : #{c.restsize}\n\n"

输出:

String Scanner restsize form : 8

String Scanner restsize form : 3