Local Variable - Revision history

Ederson at 22:12, 5 August 2023

2023-08-05T22:12:30Z

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	{{LabVIEW Palette Object Information\|palette=Functions Palette/Programming/Structures{{!}}Structures palette\|type=function\|icon=Functions Palette - Programming - Structures - Local Variable.png}}		{{LabVIEW Palette Object Information\|palette=Functions Palette/Programming/Structures{{!}}Structures palette\|type=function\|icon=Functions Palette - Programming - Structures - Local Variable.png}}

Logmanoriginal: Layout fixes.

2023-07-26T05:43:11Z

Layout fixes.

← Older revision		Revision as of 05:43, 26 July 2023
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	Example of avoiding Local Variables:		Example of avoiding Local Variables:
	If you have a State Machine design pattern and lots of Local Variables being read and written through the Cases is: ''Change local variables instances for a wire using a Shift Register to update the value when is necessary''. See the picture below:		If you have a State Machine design pattern and lots of Local Variables being read and written through the Cases is: ''Change local variables instances for a wire using a Shift Register to update the value when is necessary''. See the picture below:
	[[File:Local2.png~~\|thumb\|left\|891x367px~~]]
			[[File:Local2.png]]

	== History ==		== History ==
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	== See Also ==		== See Also ==

	https://labviewwiki.org/wiki/Race_condition		* https://labviewwiki.org/wiki/Race_condition

	== External Links ==		== External Links ==

Ederson: /* Best practice */

2023-07-25T23:14:35Z

Best practice

← Older revision		Revision as of 23:14, 25 July 2023
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	Using ''Local Variables'' breaks data flow execution. It is useful when it is not possible to pass data through wires, like parallel processes. In this case, the use of ''Local variables'' can be a solution. However, you should be careful when using this resource because it can generate unexpected behavior when you write values in multiple places in your code.		Using ''Local Variables'' breaks data flow execution. It is useful when it is not possible to pass data through wires, like parallel processes. In this case, the use of ''Local variables'' can be a solution. However, you should be careful when using this resource because it can generate unexpected behavior when you write values in multiple places in your code.
	A good rule to follow when you use ''Local Variable'' is: ''One Write, Multiple Reads''.		A good rule to follow when you use ''Local Variable'' is: ''One Write, Multiple Reads''.

			Example of avoiding Local Variables:
			If you have a State Machine design pattern and lots of Local Variables being read and written through the Cases is: ''Change local variables instances for a wire using a Shift Register to update the value when is necessary''. See the picture below:
			[[File:Local2.png\|thumb\|left\|891x367px]]

	== History ==		== History ==

Ederson at 14:11, 15 July 2023

2023-07-15T14:11:05Z

← Older revision		Revision as of 14:11, 15 July 2023
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	== Best practice ==		== Best practice ==
	~~{{ambox\|text=Add other best practices for~~ this ~~function~~.}}		Using ''Local Variables'' breaks data flow execution. It is useful when it is not possible to pass data through wires, like parallel processes. In this case, the use of ''Local variables'' can be a solution. However, you should be careful when using this resource because it can generate unexpected behavior when you write values in multiple places in your code.
			A good rule to follow when you use ''Local Variable'' is: ''One Write, Multiple Reads''.

	== History ==		== History ==

Ederson: /* See Also */

2023-07-09T23:31:36Z

Ederson: /* Usage */

2023-07-09T23:30:44Z

Usage

← Older revision		Revision as of 23:30, 9 July 2023
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	== Usage ==		== Usage ==

	~~To stop~~ both parallel loops using the same Stop Button.		Stopping both parallel loops using the same Stop Button.

			[[File:Parallel loop using local variables.png]]

			It is necessary to change Stop Button Control mechanical action from '''Latch'''... to '''Switch'''...

	== Best practice ==		== Best practice ==

Ederson: /* Usage */

2023-07-09T23:20:17Z

Usage

← Older revision		Revision as of 23:20, 9 July 2023
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	To stop both parallel loops using the same Stop Button.		To stop both parallel loops using the same Stop Button.
	~~[[File:Parallel loop using local variables.png\|thumb]]~~

	== Best practice ==		== Best practice ==

Ederson: /* Usage */

2023-07-09T23:19:41Z

Usage

← Older revision		Revision as of 23:19, 9 July 2023
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	== Usage ==		== Usage ==
	~~{{ambox~~\|~~text=Specific use cases for this function.}}~~
			To stop both parallel loops using the same Stop Button.
			[[File:Parallel loop using local variables.png\|thumb]]

	== Best practice ==		== Best practice ==

Q: Started page

2020-06-25T18:40:08Z

Started page

New page

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{{LabVIEW Palette Object Information|palette=Functions Palette/Programming/Structures{{!}}Structures palette|type=function|icon=Functions Palette - Programming - Structures - Local Variable.png}}

Use '''Local Variables''' to read or write to one of the [[Control]]s or [[Indicator]]s on the [[Front Panel]] of a [[VI]].

== Usage ==
{{ambox|text=Specific use cases for this function.}}

== Best practice ==
{{ambox|text=Add other best practices for this function.}}

== History ==
{{ambox|text=History information is needed. What changes have occurred over previous versions?}}
{| class="wikitable"
! Version
! Change(s)
|-
|[[File:LV2018.png|frameless|border|64x64px|LabVIEW 2018|link=LabVIEW 2018]]
|More info to come.
|}
== See Also ==
{{ambox|text=Add links to internal wiki pages that would also help.}}

== External Links ==
{{ambox|text=Add links to external resources that would also help.}}

[[Category:Structures Palette]]

← Older revision		Revision as of 23:31, 9 July 2023
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	== See Also ==		== See Also ==
	~~{{ambox\|text=Add links to internal~~ wiki ~~pages that would also help.}}~~
			https://labviewwiki.org/wiki/Race_condition

	== External Links ==		== External Links ==