Using A Variable Throughout My Application
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From: razordev on 26 Jun 2010 02:00 Hi All, I want to define a path name eg: path "/home/name/webs/photos" in a package and use this throughout my application. Not sure exactly how to do this? Grateful for any assistance. Best,
From: Gerald W. Lester on 26 Jun 2010 02:12 razordev wrote: > Hi All, > > I want to define a path name eg: > > path "/home/name/webs/photos" > > in a package and use this throughout my application. > > Not sure exactly how to do this? > > Grateful for any assistance. Setting it: set path "/home/name/webs/photos" or set :;path "/home/name/webs/photos" Using it: set photo [file join $path me.jpg] or set photo [file join $::path me.jpg] Now the big question, why were you unsure? What lead you to be unsure to begin with? -- +------------------------------------------------------------------------+ | Gerald W. Lester, President, KNG Consulting LLC | | Email: Gerald.Lester(a)kng-consulting.net | +------------------------------------------------------------------------+
From: Keith on 26 Jun 2010 02:44 On 6/25/10 11:12 PM, in article vTgVn.344590$9e5.35447(a)news.usenetserver.com, "Gerald W. Lester" <Gerald.Lester(a)KnG-Consulting.net> wrote: > razordev wrote: >> Hi All, >> >> I want to define a path name eg: >> >> path "/home/name/webs/photos" >> >> in a package and use this throughout my application. >> >> Not sure exactly how to do this? >> >> Grateful for any assistance. > > Setting it: > set path "/home/name/webs/photos" > or > set :;path "/home/name/webs/photos" > > Using it: > set photo [file join $path me.jpg] > or > set photo [file join $::path me.jpg] > > > Now the big question, why were you unsure? What lead you to be unsure to > begin with? > If you are using it in different procedures then you need to declare. If you are using namespace proc ::foofoo {a } { variable path set photo [file join $path me.jpg] } In a regular procedure use global proc foofoo {a } { global path set photo [file join $path me.jpg] } --� Best Regards,�Keith http://home.comcast.net/~kilowattradio/
From: Gerald W. Lester on 26 Jun 2010 12:06 Keith wrote: > > > On 6/25/10 11:12 PM, in article > vTgVn.344590$9e5.35447(a)news.usenetserver.com, "Gerald W. Lester" > <Gerald.Lester(a)KnG-Consulting.net> wrote: > >> razordev wrote: >>> Hi All, >>> >>> I want to define a path name eg: >>> >>> path "/home/name/webs/photos" >>> >>> in a package and use this throughout my application. >>> >>> Not sure exactly how to do this? >>> >>> Grateful for any assistance. >> Setting it: >> set path "/home/name/webs/photos" >> or >> set :;path "/home/name/webs/photos" >> >> Using it: >> set photo [file join $path me.jpg] >> or >> set photo [file join $::path me.jpg] >> >> >> Now the big question, why were you unsure? What lead you to be unsure to >> begin with? >> > > If you are using it in different procedures then you need to declare. > If you are using namespace Sorry, wrong, the second method I gave will work with no "declares" (variable, global and upvar are not a declaration of a variable but rather makes a link in the local context frame to another context). Also the information I gave was for the question the OP asked. To generalize, you can *always* use the fully qualified name of a global variable that resides in any namespace to access it from any other context. > proc ::foofoo {a } { > variable path > set photo [file join $path me.jpg] > } Since the procedure is at the global namespace this is the same as the procedure below... > In a regular procedure use global > proc foofoo {a } { > global path > set photo [file join $path me.jpg] > } which is the same as: proc foofoo {a} { set photo [file join $::path me.jpg] } -- +------------------------------------------------------------------------+ | Gerald W. Lester, President, KNG Consulting LLC | | Email: Gerald.Lester(a)kng-consulting.net | +------------------------------------------------------------------------+
From: John Seal on 28 Jun 2010 08:44
"Gerald W. Lester" <Gerald.Lester(a)KnG-Consulting.net> wrote in message news:vTgVn.344590$9e5.35447(a)news.usenetserver.com... > set :;path "/home/name/webs/photos" Typo alert! That should be ::path (two colons) not :;path (colon and semicolon). |