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https://github.com/Jermolene/TiddlyWiki5
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740627795f
It thereby reduces code complexity that would arise when setting
many variables using "<$set>".
```
\define helloworld() Hello world!
<$vars greeting="Hi" me={{!!title}} sentence=<<helloworld>>>
<<greeting>>! I am <<me>> and I say: <<sentence>>
</$vars>
```
How this Widget differs from the set widget:
* Variables may be created by using the "key=value" notation
that you already know from widgets like action-setfield.
* You cannot specify a fallback ("emptyValue")
* You cannot use a filter to produce a conditional variable assignement
Original discussion that led to the creation of this widget:
https://github.com/Jermolene/TiddlyWiki5/issues/1610
53 lines
1.4 KiB
Plaintext
53 lines
1.4 KiB
Plaintext
title: VarsWidget
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created: 20150426115958020
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modified: 20150426115958020
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tags: Widgets
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caption: vars
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! Introduction
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The ''vars'' widget allows you to set multiple variables in one go. It thereby reduces code complexity that would arise when setting
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many variables using the [[SetWidget]].
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! Content and Attributes
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The content of the `<$vars>` widget is the scope for the value assigned to the variable.
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|!Attribute |!Description |
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|//{attributes not starting with $}// |Each attribute name specifies a variable name. The attribute value is used as variable assignement |
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! Examples
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Consider a case where you need to set multiple variables.
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Using the `<$vars>` widget, this situation may be handled in the following way:
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```
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\define helloworld() Hello world!
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<$vars greeting="Hi" me={{!!title}} sentence=<<helloworld>>>
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<<greeting>>! I am <<me>> and I say: <<sentence>>
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</$vars>
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```
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In contrast, here is the same example, but using the `<$set>` widget instead:
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```
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<$set name="greeting" value="Hi" />
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<$set name="me" value={{!!title}} />
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<$set name="sentence" value=<<helloworld>> />
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<<greeting>>! I am <<me>> and I say: <<sentence>>
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</$set>
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</$set>
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</$set>
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```
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! Remarks
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It should be noted that this widget differs from the set widget in the following ways:
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* You cannot specify a fallback (also known as "emptyValue")
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* You cannot use a filter to produce a conditional variable assignement
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