红宝石 | StringScanner rest_size函数

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

Syntax: StringScanner.rest_size()

Parameter: StringScanner values

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

示例 #1：

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

输出 ：

String Scanner rest_size form : 19

String Scanner rest_size form : 14

示例 #2：

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

输出 ：

String Scanner rest_size form : 8

String Scanner rest_size form : 3