红宝石 | StringScanner restsize函数

StringScanner#restsize() : restsize()是一个 StringScanner 类方法，它返回字符串位置之后的字节大小。

Syntax: StringScanner.restsize()

Parameter: StringScanner values

Return: the size of the bytes after the string position.

示例 #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

示例 #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