Re^2: Localtime Updating

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Re^3: Localtime Updating by duff (Parson) on Feb 24, 2006 at 15:59 UTC
Anonymonk, now explain why you think the value of that scalar should change over time. Do you assign the value of `localtime()` many times? Do you think that by calling your subroutine, it somehow magically knows to update the value stored in `$localtime`? I don't understand your difficulty. duff	[reply] [d/l] [select]
Re^4: Localtime Updating by Anonymous Monk on Feb 24, 2006 at 16:08 UTC
Just explain, if localtime has a different time to a fraction of a second, how come when the program interacts in a loop it wouldn't give a different time for a new line, since localtime is getting called again by this new interaction inside of the loop. That's what I can't understand.	[reply]
Re^5: Localtime Updating by duff (Parson) on Feb 24, 2006 at 18:52 UTC
...since localtime is getting called again... Nothing you have shown supports this claim. You've shown a line of code that assigns the result of the `localtime()` function to the `$localtime` variable, but not where it exists in the code. So, we have no idea what execution paths may or may not cause that assignment to take place. Ergo, there is no reason for anyone to believe that the `$localtime` variable ever changes its value. To me, it sounds like you're doing something like this: `our $foo = 5; print "foo is $foo\n"; print "foo is $foo\n";` [download] and wondering why it doesn't output foo is 5 foo is 6 In this example, `$foo` clearly does not change its value between the two calls to `print`. Likewise, in your example, it appears that `$localtime` does not change its value. And this is as it should be because there is nothing magical about a variable named `$localtime`. You could have named it `$foo` as I did and you would get the same results. So ... move the assignment to `$localtime` such that it's inside your output subroutine and gets executed each time the subroutine is executed, or use one of the many suggestions given in this thread that obviate the need for an extra variable. duff-washing-his-hands-on-this-thread	[reply] [d/l] [select]
Re^3: Localtime Updating by davorg (Chancellor) on Feb 24, 2006 at 16:00 UTC
Yes. We all noticed that. But how many times does that piece of code get executed? It looks as tho' it's only called once, so the value of `$localtime` is set once but never changed. -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]
Re^4: Localtime Updating by Anonymous Monk on Feb 24, 2006 at 16:09 UTC
How could I have it changing in every line inside of the loop?	[reply]
Re^5: Localtime Updating by davorg (Chancellor) on Feb 24, 2006 at 16:41 UTC
How could I have it changing in every line inside of the loop? By using any of the suggestions that you have already been given here. If they don't work, then the problem is somewhere in the code that you haven't shown us. I suggest that you strip your problem down to complete runnable program with about ten or twnety lines of code. Then we'll be able ot give you better help. -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]