Grep过滤字典 [英] Grep filtering of the dictionary

问题描述

我很难得到一个使用grep的课程，我希望有人能帮助指导我完成这项任务。作业如下。

使用grep打印所有5字母的小写单词，它们的单个字母重复一次（aabbe或ababe无效， a和b在单词中两次）。在该打印旁边，重复的字母按照字母升序排列，购买非重复的字母。

教师指出我们需要使用几个（6）grep语句将结果传送给下一个grep）和一个sed语句（字符串编辑器）来重新格式化最后一组单词，然后将它们传送到一个读取循环，在这里你可以拆开三个非 - dup字母并对它们进行排序。

样本输出：
 aback bck 
 abaft a bft 
 abase a bes 
 abash a bhs 
 abask a bks 
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我还没有想出如何做更多的打印5个字符的单词，
 grep^ ..... $/ usr / share / dict / words | 
 
 
解决方案
 
所有在一个sed中
  sed -n'
＃过滤器5个字母字
 / [a-zA-Z] \ {5 \} / {
 
＃低字母$ b $按/ ABCDEFGHIJKLMNOPQRSTUVWXYZ / abcdefghijklmnopqrstuvwxya / 
 
＃单双字母
 /\(.\).*\1/！b 
 /\(.\).*\(.\).*\1.* \1 / b 
 /\(.\).*\(.\).*\1.*\/ b 
 /\(.\） * \（.\）。* \ 2。* \ 1 / b 
 
＃提取同行和单个
s / \（.\）* \（ 。\）\（。* \）\2\（。* \）/ a& \ 2：\ 1 \ 3 \ 4 / 
＃sort singles 
：sort 
s /：\（[^ a] * \）a\（。* \）$ /：\ 1 \ 2a / 
y / abcdefghijklmnopqrstuvwxyz / zabcdefghijklmnopqrstuvwxy / 
 / ^ a /！b sort 
 
＃clean and print 
s / ..// 
s /：/ / p 
}'YourFile 
  
 posix sed在GNU sed上  -  posix  
 
I'm having a hard time getting a grasp of using grep for a class i am in was hoping someone could help guide me in this assignment. The Assignment is as follows.

Using grep print all 5 letter lower case words from the linux dictionary that have a single letter duplicated one time (aabbe or ababe not valid because both a and b are in the word twice). Next to that print the duplicated letter followed buy the non-duplicated letters in alphabetically ascending order.

The Teacher noted that we will need to use several (6) grep statements (piping the results to the next grep) and a sed statement (String Editor) to reformat the final set of words, then pipe them into a read loop where you tear apart the three non-dup letters and sort them.
Sample Output:
aback a bck 
abaft a bft 
abase a bes 
abash a bhs 
abask a bks 
abate a bet 
I haven't figured out how to do more then printing 5 character words,
grep "^.....$" /usr/share/dict/words |

解决方案
All in one sed
sed -n '
# filter 5 letter word
/[a-zA-Z]\{5\}/ {

# lower letters
      y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxya/

# filter non single double letter
      /\(.\).*\1/ !b
      /\(.\).*\(.\).*\1.*\1/ b
      /\(.\).*\(.\).*\1.*\2/ b
      /\(.\).*\(.\).*\2.*\1/ b

# extract peer and single
      s/\(.\)*\(.\)\(.*\)\2\(.*\)/a & \2:\1\3\4/
# sort singles
:sort
      s/:\([^a]*\)a\(.*\)$/:\1\2a/
      y/abcdefghijklmnopqrstuvwxyz/zabcdefghijklmnopqrstuvwxy/
      /^a/ !b sort

# clean and print
      s/..//
      s/:/ /p
      }' YourFile
posix sed so --posix on GNU sed

                        
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