Hi Mohammad

Your construction with list widgets is a pretty good approximation of a 
switch/case construction. The only frustration is that it is possible for a 
value to trigger more than one of the list widgets; it would be better if there 
was a way to make things stop after the first match.

One could certainly imagine a <$switch>/<$case> widget pair that could resolve 
that issue and might be more efficient as well. Perhaps after v5.1.20

Best wishes

Jeremy

> On 4 Jul 2019, at 10:06, Mohammad <[email protected]> wrote:
> 
> In Javascript, C, C++ we have a programming construct called Switch-Case
> 
> See : JS: https://www.w3schools.com/js/js_switch.asp 
> <https://www.w3schools.com/js/js_switch.asp>, 
> 
> switch(expression) {
>   case x:
>     // code block
>     break;
>   case y:
>     // code block
>     break;
>   default:
>     // code block
> }
> 
> 
> This code can do equivalent operation! Is this according to TW good 
> programming practice?
> Is there any better solution? I think looking in list items may be another 
> solution! Does anybody has tried such solution before? 
> 
> 
> \define items() One Two [[Three Four]] Five
> 
> \define switch(item)
> <$list filter="[enlist<items>search<__item__>]" emptyMessage="Zero">
> <<currentTiddler>>
> </$list>
> \end
> 
> <<switch One>>
> <<switch "Three Four">>
> <<switch "Ten">>
> 
> 
> This line
> 
> <$list filter="[enlist<items>search<__item__>]" emptyMessage="Zero">
> 
> Can be like this also
> 
> <$list filter="[enlist<items>title<__item__>]" emptyMessage="Zero">
> 
> 
> What do you think?
> 
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