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Top Forums Shell Programming and Scripting Need help on " if condition" in shell Post 302602712 by Scrutinizer on Tuesday 28th of February 2012 06:09:26 AM
Old 02-28-2012
@ michael: the double quotes on the RHS of the expression should be removed at any case otherwise the characters will be interpreted as string. Also, the RHS will not be evaluated using regex but by using shell pattern matching, which is a different beast.

For extended regex, really recent bash and ksh93 provide the =~ operator.

---------- Post updated at 12:09 ---------- Previous update was at 12:06 ----------

Quote:
Originally Posted by ygemici
Code:
# if [[ $answer == [a-zA-Z]*[a-zA-Z0-9_-] ]] ; then echo ok ;fi
ok

I think it is good to point out that the OK is because the first character of $answer is a letter and the last character is in [a-zA-Z0-9_-] and that the intermediate characters can be anything. I am not sure if that is what the OP has in mind.

Last edited by Scrutinizer; 02-28-2012 at 08:42 AM..
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set_color(1)							       fish							      set_color(1)

NAME
set_color - set_color - set the terminal color set_color - set the terminal color Synopsis set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR] Description Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple, cyan, white and normal. o -b, --background Set the background color o -c, --print-colors Prints a list of all valid color names o -h, --help Display help message and exit o -o, --bold Set bold or extra bright mode o -u, --underline Set underlined mode o -v, --version Display version and exit Calling set_color normal will set the terminal color to whatever is the default color of the terminal. Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey font color, while set_color --bold white will result in a white font color. Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator. set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of ncurses and recompile fish against it in order to fix this issue. Version 1.23.1 Sun Jan 8 2012 set_color(1)
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