08-29-2011
Quote:
Originally Posted by
wabard
I'm not convinced that in today's world of fast CPU's that this is overly important
It is. The more and more CPU speed we have, the more and more wasteful programmers get, so it about balances out. If you can write just a little better, you can get really big gains.
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APPLY(1) General Commands Manual APPLY(1)
NAME
apply - apply a command to a set of arguments
SYNOPSIS
apply [ -ac ] [ -n ] command args ...
DESCRIPTION
Apply runs the named command on each argument arg in turn. Normally arguments are chosen singly; the optional number n specifies the num-
ber of arguments to be passed to command. If n is zero, command is run without arguments once for each arg. Character sequences of the
form %d in command, where d is a digit from 1 to 9, are replaced by the d'th following unused arg. If any such sequences occur, n is
ignored, and the number of arguments passed to command is the maximum value of d in command. The character `%' may be changed by the -a
option.
Examples:
apply echo *
is similar to ls(1);
apply -2 cmp a1 b1 a2 b2 ...
compares the `a' files to the `b' files;
apply -0 who 1 2 3 4 5
runs who(1) 5 times; and
apply 'ln %1 /usr/joe' *
links all files in the current directory to the directory /usr/joe.
SEE ALSO
sh(1)
AUTHOR
Rob Pike
BUGS
Shell metacharacters in command may have bizarre effects; it is best to enclose complicated commands in single quotes ' '.
There is no way to pass a literal `%2' if `%' is the argument expansion character.
4.2 Berkeley Distribution April 29, 1985 APPLY(1)