On Wed, Dec 27, 2006 at 11:03:31PM +0000, Richard Neill wrote:
> 1)substr support for a negative length argument.
> For example,
> stringZ=abcdef
> echo ${stringZ:2:-1} #prints cde
>
> i.e. ${string:x:y}
> returns the string, from start position x for y characters.
> but, if x is negative, start from the right hand side
> and if y is negative, print up to the end, -y.
>
> This would work the same way as PHP, and be extremely useful for, say,
> removing an extension from a filename.
> http://uk.php.net/manual/en/function.substr.php
Python has it too :-)
> 5)An enhancement to read/readline, such that one can specify the initial
> value with which the buffer is filled.
>
> Currently, we can do:
>
> read -ep 'Enter your name: ' NAME
>
> and I might type "Richad Neill". #Note the deliberate typo.
>
> If the script recognises this as invalid, the best it can do is:
>
> echo "Name not recognised"
> read -ep 'Re-enter your name: ' NAME
>
> and the user must retype it in full.
> I'd like to propose adding an "-i" option for initial value:
>
> echo "Name not recognised"
> read -ep "Please correct your name: " -i "$NAME"
>
> The shell prints:
> Please correct your name: Richad Neill
> where the latter part is now editable.
>
> Thus the really nice editing features of readline can be used for
> updating values already stored in variables. This is extremely useful
> when the value is quite long.
Is this the same as
read -ep "Please correct your name: $NAME" NAME
?
--
William Park <[EMAIL PROTECTED]>, Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
http://home.eol.ca/~parkw/thinflash.html
BashDiff: Super Bash shell
http://freshmeat.net/projects/bashdiff/
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