红宝石 | StringScanner 匹配大小函数

StringScanner#matched_size() ：matched_size()是一个 StringScanner 类方法，它返回最近匹配的大小

Syntax: StringScanner.matched_size()
Parameter: StringScanner values
Return: the size of the most recent match otherwise return nil

示例 #1：

Ruby

# Ruby code for StringScanner.matched_size() method
 
# loading StringScanner
require 'strscan'
 
# declaring StringScanner
c = StringScanner.new("Mon Sep 12 2018 14:39")
 
c.match?(/\s+/)
# matched_size() method
puts "String Scanner matched_size form : #{c.matched_size()}\n\n"
 
c.match?(/\w+/)
# matched_size() method
puts "String Scanner matched_size form : #{c.matched_size()}\n\n"

输出 ：

String Scanner matched_size form : 

String Scanner matched_size form : 3

示例 #2：

红宝石

# Ruby code for StringScanner.matched_size() method
 
# loading StringScanner
require 'strscan'
 
# declaring StringScanner
c = StringScanner.new("hellogeeks")
 
c.match?(/\s+/)
# matched_size() method
puts "String Scanner matched_size form : #{c.matched_size()}\n\n"
 
c.match?(/\w+/)
# matched_size() method
puts "String Scanner matched_size form : #{c.matched_size()}\n\n"

输出 ：

String Scanner matched_size form : 

String Scanner matched_size form : 10