On Tuesday 18 April 2006 00:34, [EMAIL PROTECTED] wrote:
> In a shellp script, let
> STRING="a.txt b.txt c.txt"
> And I want to delete a sub-string from $STRING, for example
> b.txt, and then we got
> $STRING is "a.txt c.txt"
>
> How to achieve it?
>From man bash:
${parameter:-word}
Use Default Values. If parameter is unset or null, the expansion of word is
substituted. Otherwise, the value of parameter is substituted.
So for what you want just do:
STRING="a.txt b.txt c.txt"
${STRING:-b.txt}
There are tons of ways to manipulate "parameters" and you should reference the
man page for more. Look under "Parameter Expansion" for all the
possibilities.
--
Zac Slade
[EMAIL PROTECTED]
ICQ:1415282 YM:krakrjak AIM:ttyp99
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