Ruby StringScanner scan用法及代碼示例

StringScanner＃scan()：scan()是StringScanner類方法，嘗試與當前位置的圖案匹配。

用法：StringScanner.scan()

參數：StringScanner值

返回：匹配的字符串，否則返回false

示例1:

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

輸出：

String Scanner result of c.scan() form : 3

String Scanner result of c.scan() form : 4

示例2:

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

輸出：

String Scanner result of c.scan() form : 1

String Scanner result of c.scan() form : 2

相關用法

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