问题描述
我有以下格式的字符串:
I have a string in the following format:
string1:string2:string3:string4:string5
我正在尝试使用 sed 拆分 : 上的字符串并将每个子字符串打印在新行上.这是我正在做的:
I'm trying to use sed to split the string on : and print each sub-string on a new line. Here is what I'm doing:
cat ~/Desktop/myfile.txt |sed s/:/\n/
打印:
string1
string2:string3:string4:string5
我怎样才能让它在每个分隔符上拆分?
How can I get it to split on each delimiter?
推荐答案
要使用 GNU sed 使用分隔符拆分字符串，您说:
To split a string with a delimiter with GNU sed you say:
sed 's/delimiter/
/g' # GNU sed
例如，使用 : 作为分隔符进行拆分:
For example, to split using : as a delimiter:
$ sed 's/:/
/g' <<< "he:llo:you"
he
llo
you
或者使用非 GNU sed:
Or with a non-GNU sed:
$ sed $'s/:/\
/g' <<< "he:llo:you"
he
llo
you
在这种特殊情况下，您错过了替换后的 g.因此，它只完成一次.见:
In this particular case, you missed the g after the substitution. Hence, it is just done once. See:
$ echo "string1:string2:string3:string4:string5" | sed s/:/\n/g
string1
string2
string3
string4
string5
g 代表 global，意味着替换必须在全局范围内完成，也就是说，对于任何出现.看到默认是1，如果你把例子2，它做了2次，等等.
g stands for global and means that the substitution has to be done globally, that is, for any occurrence. See that the default is 1 and if you put for example 2, it is done 2 times, etc.
在您的情况下，您需要使用:
All together, in your case you would need to use:
sed 's/:/\n/g' ~/Desktop/myfile.txt
请注意，您可以直接使用 sed ... file 语法，而不是不必要的管道: cat file |sed.
Note that you can directly use the sed ... file syntax, instead of unnecessary piping: cat file | sed.
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