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Re^3: A "but" operator.

by cfreak (Chaplain)
on Sep 28, 2004 at 03:27 UTC ( #394453=note: print w/replies, xml ) Need Help??

in reply to Re^2: A "but" operator.
in thread A "but" operator.

The first meaning could actually be useful in programming to indicate that a variable should have a different value under certain conditions, but with the ability to remember the past condition and revert to it automatically.

Then you could do something like this:

my $var1 = "foo" but ($some_input_var eq 'show_bar') { "bar" }; print $var1; # prints 'foo' #$some_input_var is changed by a user to 'show_bar'; print $var1; #prints 'bar' #$some_input_var is changed to something else print $var1; #prints 'foo'

Of course after thinking about it, its totally pointless ... one could do the same thing with

$var1 = sub { 'foo' ? $some_input_var ne 'show_bar' : 'bar' };

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