warning: regex literal in condition 怎么改?

pitonas

warning: regex literal in condition
warning: regex literal in condition
大神们, 怎么改下面的代码?不warning

1. #!/usr/bin/ruby -w
   
2. while DATA.gets
   
3.    print if /begin/.. /stop/
   
4. end
   
5. 
   
6. __END__
   
7. a
   
8. begin
   
9. 1
   
10. 2
    
11. 3
    
12. stop
    
13. z
    
14. s

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pitonas

谢谢大牛，这个有意思，但有错误。

这个可以

1. #!/usr/bin/ruby -w
   
2. 
   
3. while DATA.gets
   
4.    print if ~/start/ .. ~/end/
   
5. end
   
6. 
   
7. __END__
   
8. a
   
9. start
   
10. 1
    
11. 2
    
12. 3
    
13. end
    
14. z
    
15. s

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回复 2# Sevk


   

pitonas

回复 5# Sevk

~ rxp → integer or nil

Match—Matches rxp against the contents of $_. Equivalent to rxp =~ $_.

1. $_ = "input data"
   
2. ~ /at/   #=> 7

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http://www.ruby-doc.org/core-2.0.0/Regexp.html