Question

您好我有一个值为

的文本文件

A VAL|1|2|3|

C VAL|2|2|3|

D VAL|1|2|3|

[No space between lines]

I want to replace the values in the above as per the first col i.e A VAL,C  
VAL,D VAL,
so I want to 

1. replace 3 from A VAL row 
2. replace 2 value from C VAL row.
3. replace 1 value from D VAL row.
Basically I want to modify the above values by using AWK as AWK helps 
     treating csv , pipe delimited files
So I tried by using AWK command as

enter code here

`awk 'BEGIN {OFS=FS="|"} {if ($1="A") sub($4,"A1") ;elseif ($1="C") sub        
            ($2,"B1"); print }' myval.txt`

*但我得错了结果*

C ^ | B1 | 2 | A1 | B1C

C ^ | B1 | 2 | A1 | B1C

C ^ | B1 | 2 | 3 | B1C

 >The fisrt column itself is geting replace and the substitution is at wrong
 >position.

**预期输出为**

A VAL|1|2|A1|
C VAL|2|2|B1|
D VAL|1|2|3|

Answer 1

你可以试试这个awk：

awk 'BEGIN{OFS=FS="|"} $1 ~ /^A/{$(NF-1)="A1"} $1 ~ /^C/{$(NF-1)="B1"} 1' file.csv

A VAL|1|2|A1|
C VAL|2|2|B1|
D VAL|1|2|3|

Answer 2

awk'BEGIN {OFS = FS =“|”} {if（substr（$ 1,0,1）==“A”）sub（$ 3，“A1”，$ 3）;否则if（substr（$ 1， 0,1）==“C”）sub（$ 3，“B1”，$ 3）;否则if（substr（$ 1,0,1）==“D”）sub（$ 3，“3”，$ 3）;打印''inputtext.txt＆gt; outtext.txt

这很好用

Awk结果不起作用

您好我有一个值为

2 个答案: