[英]AWK : Field Separator as Double Pipes or more
My data: 我的资料:
-1||"A|AA"||aaa@ymail
-10||"B ||B|ttB||b|| bb@ymail
-7||C||c
I want to exchange the double pipe delimiters ||
我想交换双管道定界符||
with a comma ,
like this: 用逗号表示,
如下所示:
awk -F'||' -v OFS="," '{$1=$1} 1' 2.txt
but the output remains the same. 但输出保持不变。 The reverse case (comma delimiter to double pipe), however, works: 相反的情况(逗号分隔符为双竖线)有效:
awk -F"," -v OFS="||" '{$1=$1} 1' 1.txt
What am I doing wrong? 我究竟做错了什么?
您需要转义管道符号:
awk -F '[|][|]' -v OFS="," '{$1=$1}1'
You need to escape metacharacters like |
您需要转义|
元字符 or use them in character class so that they are considered literals. 或在字符类中使用它们,以便将它们视为文字。 They are considered logical OR
notation without escapes. 它们被认为是逻辑OR
符号,不能转义。 Try this: 尝试这个:
$ awk -F'[|][|]' -v OFS="," '{$1=$1} 1' data
-1,"A|AA",aaa@ymail
-10,"B ,B|ttB,b, bb@ymail
-7,C,c
Different ways to do this : 不同的方式来做到这一点:
awk -F '[|][|]' -v OFS="," '{$1=$1}1' # as suggested by accepted anwer
awk -F '[|]{2}' # my favorite as it is easier to extend this solution to more than two pipes
awk -F '\\|\\|' -v OFS="," '{$1=$1}1' # another way to escape
awk -F "\\\|\\\|" -v OFS="," '{$1=$1}1' # see https://superuser.com/a/1249834
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