关于RLENGTH

menulst

1. [root@localhost awk]# echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
2. 2 2 3 0
   
3. [root@localhost awk]# echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
4. 2 2 8 0
   

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RLENGTH的值为什么会发生变化?请高手指点下.

menulst

awk版本:

1. [root@localhost awk]# awk --version
   
2. GNU Awk 3.1.7
   
3. Copyright (C) 1989, 1991-2009 Free Software Foundation.

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yinyuemi

回复 1# menulst

看看这样是不是结果就一样了，和awk应该没关系
    Lang=C; echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
    Lang=C; echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'

menulst

回复 3# yinyuemi

1. [root@localhost awk]# Lang=C; echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
2. 2 2 3 0
   
3. [root@localhost awk]# Lang=C; echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
4. 2 2 8 0

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貌似结果一样啊

seesea2517

LANG 大写。

1. [seesea@UC ~]$ echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
2. 2 2 3 0
   
3. [seesea@UC ~]$ echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
4. 2 2 8 0
   
5. [seesea@UC ~]$ echo $LANG
   
6. zh_CN
   
7. [seesea@UC ~]$ LANG=C; echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
8. 2 2 3 0
   
9. [seesea@UC ~]$ LANG=C; echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
   
10. 2 2 3 0
    
11. [seesea@UC ~]$ echo $LANG
    
12. C
    
13. [seesea@UC ~]$ echo "aAAAaBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'        
    
14. 2 2 3 0
    
15. [seesea@UC ~]$ echo "aAAAbBBBB" | awk '{len=match($0, /[A-Z]+/); print len, RSTART, RLENGTH, IGNORECASE}'
    
16. 2 2 3 0

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L_kernel

这个怎么解释？疑惑~~

menulst

seesea2517 发表于 2012-10-12 09:35
LANG 大写。

的确是这样，这个怎么解释呢？能不能讲下？ 是和正则的Unicode有关？