Re: global variables
Re: global variables
- Subject: Re: global variables
- From: David Crowe <email@hidden>
- Date: Wed, 17 Jul 2013 14:04:52 -0600
One problem with global variables is usually one of scope. If you re-use one of the names inside a function you can end up with mysterious problems when you end up using a local variable instead of global.
It is also difficult to see exactly where a global variable is set/modified/read. However, if the variables are initialized once, never modified, and only used by functions, then this should not be a problem.
Another option would be to create a large associative array and pass that around.
- David
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 17 Jul 2013 13:49:47 -0500
> From: Jim Brandt <email@hidden>
> To: email@hidden
> Subject: global variables
> Message-ID:
> <email@hidden>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Is there a downside to using global variables?
>
> I have several lists of data that I need across several handlers. This data
> has been loaded from several .plist files in the main script. I then need
> this data in the handlers being called by the main script.
>
> Am I better off making the lists global at the top level and then have them
> available in the handlers or re-reading the .plist files in each handler or
> pass them in through the argument list (I really don't want to do this
> because the argument list gets quite long)?
>
> Are the significant advantages of one method over another?
>
> TIA,
>
> Jim Brandt
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