""和$""差在哪儿~~

Nalternative

我不知道

xiaopan3322

回复 8# where27


    老表，你是不是没仔细看啊，那个例子正好说明了下面这段话啊：

A double-quoted string preceded by a dollar sign ($) will cause the string to be translated according to the current locale. If the current locale is C or POSIX, the dollar sign is ignored. If the string is translated and replaced, the replacement is double-quoted.

    要不，再看一遍？看最后的那段解释……

where27

回复 12# xiaopan3322

1. [root@ZB-MS-TEST01 test]# more test.sh
   
2. #!/bin/bash
   
3. echo $"1"
   
4. echo $1
   
5. 
   
6. hello=$"${@// /\ }"
   
7. echo -e "\n$hello"
   
8. 
   
9. hello=${@// /\\ }
   
10. echo -e "\n$hello"
    
11. 
    
12. hello=${@// /\ }
    
13. echo -e "\n$hello"
    
14. 
    
15. echo $"${@//\$"2"/Hi Bob}"
    
16. echo $"${@//$2/Hi Bob}"
    
17. [root@ZB-MS-TEST01 test]# more test1.sh
    
18. #!/bin/bash
    
19. echo "1"
    
20. echo $1
    
21. 
    
22. hello="${@// /\ }"
    
23. echo -e "\n$hello"
    
24. 
    
25. hello=${@// /\\ }
    
26. echo -e "\n$hello"
    
27. 
    
28. hello=${@// /\ }
    
29. echo -e "\n$hello"
    
30. 
    
31. echo "${@//"2"/Hi Bob}"
    
32. echo "${@//$2/Hi Bob}"
    
33. [root@ZB-MS-TEST01 test]# ./test.sh a b c d
    
34. 1
    
35. a
    
36. 
    
37. a b c d
    
38. 
    
39. a b c d
    
40. 
    
41. a b c d
    
42. a b c d
    
43. a Hi Bob c d
    
44. [root@ZB-MS-TEST01 test]# ./test1.sh a b c d
    
45. 1
    
46. a
    
47. 
    
48. a b c d
    
49. 
    
50. a b c d
    
51. 
    
52. a b c d
    
53. a b c d
    
54. a Hi Bob c d
    
55. [root@ZB-MS-TEST01 test]# ./test.sh "a b c d"
    
56. 1
    
57. a b c d
    
58. 
    
59. a\ b\ c\ d
    
60. 
    
61. a\ b\ c\ d
    
62. 
    
63. a b c d
    
64. a b c d
    
65. a b c d
    
66. [root@ZB-MS-TEST01 test]# ./test1.sh "a b c d"
    
67. 1
    
68. a b c d
    
69. 
    
70. a\ b\ c\ d
    
71. 
    
72. a\ b\ c\ d
    
73. 
    
74. a b c d
    
75. a b c d
    
76. a b c d

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好像从上面的例子看不出来$""与""的区别，我没理解the string to be translated according to the current locale这句话，所以想举个例子看看

xiaopan3322

回复 13# where27


    一个需要转移，一个不需要转义，看那个\

xiaopan3322

回复 13# where27

If the current locale is C or POSIX, the dollar sign is ignored.
1.

1. xiabao@6P9SN2X ~/test
   
2. $ locale
   
3. LANG=zh_CN.GBK
   
4. LC_CTYPE="C"
   
5. LC_NUMERIC="C"
   
6. LC_TIME="C"
   
7. LC_COLLATE="C"
   
8. LC_MONETARY="C"
   
9. LC_MESSAGES="C"
   
10. LC_ALL=C
    
11. 
    
12. xiabao@6P9SN2X ~/test
    
13. $ str="b xp"
    
14. 
    
15. xiabao@6P9SN2X ~/test
    
16. $ hello1=$"${str// /\ }"
    
17. 
    
18. xiabao@6P9SN2X ~/test
    
19. $ hello2="${str// /\ }"
    
20. 
    
21. xiabao@6P9SN2X ~/test
    
22. $ hello3=${str// /\ }  
    
23. 
    
24. xiabao@6P9SN2X ~/test
    
25. $ echo -e "hello1: $hello1\nhello2: $hello2\nhello3: $hello3"
    
26. hello1: b\ xp
    
27. hello2: b\ xp
    
28. hello3: b xp

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2.

1. [Bob@hzling20:~/test]-No.32->$ locale
   
2. LANG=en_US.UTF-8
   
3. LC_CTYPE="en_US.UTF-8"
   
4. LC_NUMERIC="en_US.UTF-8"
   
5. LC_TIME="en_US.UTF-8"
   
6. LC_COLLATE="en_US.UTF-8"
   
7. LC_MONETARY="en_US.UTF-8"
   
8. LC_MESSAGES="en_US.UTF-8"
   
9. LC_PAPER="en_US.UTF-8"
   
10. LC_NAME="en_US.UTF-8"
    
11. LC_ADDRESS="en_US.UTF-8"
    
12. LC_TELEPHONE="en_US.UTF-8"
    
13. LC_MEASUREMENT="en_US.UTF-8"
    
14. LC_IDENTIFICATION="en_US.UTF-8"
    
15. [Bob@hzling20:~/test]-No.33->$ str="b xp"                          
    
16. [Bob@hzling20:~/test]-No.34->$ hello1=$"${str// /\ }"              
    
17. [Bob@hzling20:~/test]-No.35->$ hello2="${str// /\ }"              
    
18. [Bob@hzling20:~/test]-No.36->$ hello3=${str// /\ }               
    
19. [Bob@hzling20:~/test]-No.37->$ echo -e "hello1: $hello1\nhello2: $hello2\nhello3: $hello3"
    
20. hello1: b\ xp
    
21. hello2: b\ xp
    
22. hello3: b xp

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zzy7186

学习了

where27

多谢几位的解答，我知道了，$"..."结构的作用gettext命令类似，结贴

xiaopan3322

回复 17# where27


    老表威武啊，连gettext命令都知道啊……学习了