03-17-2011
Quote:
Originally Posted by
Straitsfan
So when would you glob and when would you use regular expressions? I'm still somewhat confused.
Most of the time you won't have the option to choose between using glob or regular expressions, and will have to use what the tool offers. As a general rule of thumb you will be using glob for the shell prompt, and regex for everything else.
For example if from a shell prompt you type
ls p* you would expect the shell to expand p* to any file begining with p (glob) not any file with zero or more p's anywhere in the name (regex). Which highlights another difference in glob (patterns span the whole string, like having an implied "^" at the front and "$" at the end with regex).
Here is a little table with glob and regex
equivalent
glob | regex |
b | ^b$ |
b* | ^b.*$ |
*.jpg | ^.*\.jpg$ |
[ab]* | ^[ab].*$ |
Last edited by Chubler_XL; 03-17-2011 at 08:19 PM..
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RATFOR(1) General Commands Manual RATFOR(1)
NAME
ratfor - rational Fortran dialect
SYNOPSIS
ratfor [ option ... ] [ filename ... ]
DESCRIPTION
Ratfor converts a rational dialect of Fortran into ordinary irrational Fortran. Ratfor provides control flow constructs essentially iden-
tical to those in C:
statement grouping:
{ statement; statement; statement }
decision-making:
if (condition) statement [ else statement ]
switch (integer value) {
case integer: statement
...
[ default: ] statement
}
loops: while (condition) statement
for (expression; condition; expression) statement
do limits statement
repeat statement [ until (condition) ]
break [n]
next [n]
and some syntactic sugar to make programs easier to read and write:
free form input:
multiple statements/line; automatic continuation
comments:
# this is a comment
translation of relationals:
>, >=, etc., become .GT., .GE., etc.
return (expression)
returns expression to caller from function
define:
define name replacement
include:
include filename
The option -h causes quoted strings to be turned into 27H constructs. -C copies comments to the output, and attempts to format it neatly.
Normally, continuation lines are marked with a & in column 1; the option -6x makes the continuation character x and places it in column 6.
Ratfor is best used with f77(1).
SEE ALSO
f77(1)
B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976.
RATFOR(1)