Ruby StringScanner post_match用法及代碼示例

StringScanner＃post_match()：post_match()是一個StringScanner類方法，它返回上一次掃描的post-match(以正則表達式表示)

用法：StringScanner.post_match()

參數：StringScanner值

返回：上次掃描的post-match(在正則表達式中)

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"

輸出：

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"

輸出：

String Scanner post_match form :  ello geeks

String Scanner post_match form : ello geeks

相關用法

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