Ruby StringScanner rest_size函数

StringScanner#rest_size() : rest_size()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.rest_size()

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.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

例子 #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