On Sunday, March 18, 2018 at 11:01:58 PM UTC+1, Joe Armstrong wrote: > > So, what is the equivalent tiddler code to perform the following > operations in a conventional programming languages? > > 1) Set a variable to a simple value and use the value >
a) In TW "variables" are scoped. b) The scope boundary is the widget, that defines the variable c) For historic reasons there are 2 dedicated widgets that set variables only. d) <$set - widget and e) <$vars - widget <$set existed first ... Since defining several variables can be cumbersome using nested set-widgets, <$vars was created in TW version 5.1.9 See: https://tiddlywiki.com/#VarsWidget ... It also explains the differences between setWidget <https://tiddlywiki.com/#SetWidget> and varsWidget ------------------- simple example: <$set name="local-scope" value="known in $set boundary only"> <<local-scope>> </$set> 2) Set a variable to a complex value and use the complex value > If we create a macro at the beginning of the tiddler like in the following code, we can define a tiddler-local or tiddler-global scope: \define tiddler-scope() known within a tiddler <$set name="local-scope" value="known in $set boundary only"> <<tiddler-scope>> <<local-scope>> </$set> --- <<tiddler-scope>> <<local-scope>> ... is silently ignored. Internally the \define macro() section is converted to a <$set widget ... as I wrote in an other post <https://groups.google.com/d/msg/tiddlywiki/i1winZZTGEg/HJvB8N6KCQAJ>: ------------------ To create "system-wide" global scope you'll need to create a tiddler named eg: myMacros and tag it: $:/tags/Macro see: https://tiddlywiki.com/#Macros Internally: At the beginning of every tiddler a <$importvariables .. widget is called, which "imports" every tiddler tagged $:/tags/Macro available within a tidder scope. see: https://tiddlywiki.com/#ImportVariablesWidget section: Global Macros This code is defined in $:/core/ui/PageTemplate ... as described in the link above. have fun! mario -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/c082b751-807d-4935-b971-3a3f0a07a047%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
