提取数字并循环打印

waker

yestreenstars 发表于 2013-02-28 11:24
回复 4# seesea2517

效率不一样的

yestreenstars

回复 11# waker


    你是说我改后的单行脚本和他的效率不一样？我用time测试了一下，是一样的啊~

blackold

回复 12# yestreenstars


汗。看错了，t根本没有机会执行。

t啥是多余的。

yestreenstars

回复 9# seesea2517


    是啊，不过感觉效率好低啊，呵呵~

yestreenstars

1. [root@localhost ~]# cat t
   
2. s/([0-9]+) to ([0-9]+)/{\1..\2}/g
   
3. s/^/echo /
   
4. e
   
5. 
   
6. :loop
   
7.     s/([^0-9]*)( [0-9]+)( [0-9]+)/\1\2\n\1\3/
   
8.     P
   
9.     D
   
10. tloop
    
11. [root@localhost ~]# cat i
    
12. port trunk allow-pass vlan 3 to 19 21 to 25 29 32 to 35 37 to 41 43 to 44 48 52 to 56 59 to 64 66 to 70
    
13. [root@localhost ~]# time sed -rf t i
    
14. port trunk allow-pass vlan 3
    
15. port trunk allow-pass vlan 4
    
16. port trunk allow-pass vlan 5
    
17. port trunk allow-pass vlan 6
    
18. port trunk allow-pass vlan 7
    
19. port trunk allow-pass vlan 8
    
20. port trunk allow-pass vlan 9
    
21. port trunk allow-pass vlan 10
    
22. port trunk allow-pass vlan 11
    
23. port trunk allow-pass vlan 12
    
24. port trunk allow-pass vlan 13
    
25. port trunk allow-pass vlan 14
    
26. port trunk allow-pass vlan 15
    
27. port trunk allow-pass vlan 16
    
28. port trunk allow-pass vlan 17
    
29. port trunk allow-pass vlan 18
    
30. port trunk allow-pass vlan 19
    
31. port trunk allow-pass vlan 21
    
32. port trunk allow-pass vlan 22
    
33. port trunk allow-pass vlan 23
    
34. port trunk allow-pass vlan 24
    
35. port trunk allow-pass vlan 25
    
36. port trunk allow-pass vlan 29
    
37. port trunk allow-pass vlan 32
    
38. port trunk allow-pass vlan 33
    
39. port trunk allow-pass vlan 34
    
40. port trunk allow-pass vlan 35
    
41. port trunk allow-pass vlan 37
    
42. port trunk allow-pass vlan 38
    
43. port trunk allow-pass vlan 39
    
44. port trunk allow-pass vlan 40
    
45. port trunk allow-pass vlan 41
    
46. port trunk allow-pass vlan 43
    
47. port trunk allow-pass vlan 44
    
48. port trunk allow-pass vlan 48
    
49. port trunk allow-pass vlan 52
    
50. port trunk allow-pass vlan 53
    
51. port trunk allow-pass vlan 54
    
52. port trunk allow-pass vlan 55
    
53. port trunk allow-pass vlan 56
    
54. port trunk allow-pass vlan 59
    
55. port trunk allow-pass vlan 60
    
56. port trunk allow-pass vlan 61
    
57. port trunk allow-pass vlan 62
    
58. port trunk allow-pass vlan 63
    
59. port trunk allow-pass vlan 64
    
60. port trunk allow-pass vlan 66
    
61. port trunk allow-pass vlan 67
    
62. port trunk allow-pass vlan 68
    
63. port trunk allow-pass vlan 69
    
64. port trunk allow-pass vlan 70
    
65. 
    
66. real    0m0.769s
    
67. user    0m0.054s
    
68. sys     0m0.534s
    
69. [root@localhost ~]# time sed -r 's/([0-9]+) to ([0-9]+)/{\1..\2}/;s/^/echo /e;:1;s/([^0-9]*)( [0-9]+)( [0-9]+)/\1\2\n\1\3/;P;D' i
    
70. port trunk allow-pass vlan 3
    
71. port trunk allow-pass vlan 4
    
72. port trunk allow-pass vlan 5
    
73. port trunk allow-pass vlan 6
    
74. port trunk allow-pass vlan 7
    
75. port trunk allow-pass vlan 8
    
76. port trunk allow-pass vlan 9
    
77. port trunk allow-pass vlan 10
    
78. port trunk allow-pass vlan 11
    
79. port trunk allow-pass vlan 12
    
80. port trunk allow-pass vlan 13
    
81. port trunk allow-pass vlan 14
    
82. port trunk allow-pass vlan 15
    
83. port trunk allow-pass vlan 16
    
84. port trunk allow-pass vlan 17
    
85. port trunk allow-pass vlan 18
    
86. port trunk allow-pass vlan 19
    
87. port trunk allow-pass vlan 21
    
88. port trunk allow-pass vlan 22
    
89. port trunk allow-pass vlan 23
    
90. port trunk allow-pass vlan 24
    
91. port trunk allow-pass vlan 25
    
92. port trunk allow-pass vlan 29
    
93. port trunk allow-pass vlan 32
    
94. port trunk allow-pass vlan 33
    
95. port trunk allow-pass vlan 34
    
96. port trunk allow-pass vlan 35
    
97. port trunk allow-pass vlan 37
    
98. port trunk allow-pass vlan 38
    
99. port trunk allow-pass vlan 39
    
100. port trunk allow-pass vlan 40
     
101. port trunk allow-pass vlan 41
     
102. port trunk allow-pass vlan 43
     
103. port trunk allow-pass vlan 44
     
104. port trunk allow-pass vlan 48
     
105. port trunk allow-pass vlan 52
     
106. port trunk allow-pass vlan 53
     
107. port trunk allow-pass vlan 54
     
108. port trunk allow-pass vlan 55
     
109. port trunk allow-pass vlan 56
     
110. port trunk allow-pass vlan 59
     
111. port trunk allow-pass vlan 60
     
112. port trunk allow-pass vlan 61
     
113. port trunk allow-pass vlan 62
     
114. port trunk allow-pass vlan 63
     
115. port trunk allow-pass vlan 64
     
116. port trunk allow-pass vlan 66
     
117. port trunk allow-pass vlan 67
     
118. port trunk allow-pass vlan 68
     
119. port trunk allow-pass vlan 69
     
120. port trunk allow-pass vlan 70
     
121. 
     
122. real    0m0.645s
     
123. user    0m0.042s
     
124. sys     0m0.533s

复制代码

请二位对比一下~时间是差不多的~
@waker
@blackold

blackold

回复 15# yestreenstars


    看错了。t没有机会执行，确实是多余的。

waker

回复 15# yestreenstars


    想当然了，是一样的

seesea2517

@yestreenstars@waker@blackold
对 D 的操作没有认识透彻，想当然了我。让 t 操作不成为多余的话，改成这样，效率会高一点：

1. [seesea@UC ~]$ time sed -rf num2.sed fi > /dev/null
   
2. 
   
3. real    0m0.007s
   
4. user    0m0.004s
   
5. sys     0m0.003s
   
6. [seesea@UC ~]$ time sed -rf num.sed fi > /dev/null
   
7. 
   
8. real    0m0.108s
   
9. user    0m0.064s
   
10. sys     0m0.040s
    
11. [seesea@UC ~]$ cat num2.sed
    
12. s/([0-9]+) to ([0-9]+)/{\1..\2}/g
    
13. s/^/echo /
    
14. e
    
15. 
    
16. :loop
    
17.     s/([^0-9]*)( [0-9]+)( [0-9]+)/\1\2\n\1\3/
    
18.     P
    
19.     s/[^\n]*\n//
    
20. tloop

复制代码

seesea2517

@waker@blackold@yestreenstars

回复 18# seesea2517


    看见 sed -rf 突然一惊，然后想到，哦，不是 rm，还好还好，阿米豆腐。

yestreenstars

回复 18# seesea2517


    确实快多了~不过最后那里多输出一行了~