Ruby StringScanner post_match用法及代码示例

StringScanner＃post_match()：post_match()是一个StringScanner类方法，它返回上一次扫描的post-match(以正则表达式表示)

用法：StringScanner.post_match()

参数：StringScanner值

返回：上次扫描的post-match(在正则表达式中)

示例1:

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

输出：

String Scanner post_match form :  Sep 12 2018 14:39

String Scanner post_match form : Sep 12 2018 14:39

示例2:

# Ruby code for StringScanner.post_match() method 
  
# loading StringScanner 
require 'strscan'
  
# declaring StringScanner  
c = StringScanner.new("h ello geeks") 
  
c.scan(/\w+/)  
# post_match() method 
puts "String Scanner post_match form : #{c.post_match()}\n\n"
  
c.scan(/\s+/) 
# post_match() method 
puts "String Scanner post_match form : #{c.post_match()}\n\n"

输出：

String Scanner post_match form :  ello geeks

String Scanner post_match form : ello geeks

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注：本文由纯净天空筛选整理自mayank5326大神的英文原创作品 Ruby | StringScanner post_match function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。