Is there any "select case" or "switch case" structure in ams script?

[mahdi86]

I have many conditions should have be checked, is there "switch case" or "select case" structure in ams script I could use instead of a single if and many many elseif ?

[Ulrich]

No, there is no "switch" statement in Lua, but most likely (if inside each case you only perform assignments) you can get the results you need using a table, indexing it using the "case" value.

Ulrich

[Imagine Programming]

No, there is no "switch" statement in Lua, but most likely (if inside each case you only perform assignments) you can get the results you need using a table, indexing it using the "case" value.

Ulrich

I think this is something what Ulrich is aiming at, but with functions. It isn't really that great though, but occasionally this might help.

-- globals
function switch(cases, value)
    if(type(cases[value]) == "function")then
        cases[value]();
    else
        if(type(cases.default))then
            cases.default();
        end    
    end
end

-- anywhere
local cases = {
    [10] = function()
        Dialog.Message("10", "10");
    end;
    
    [100] = function()
        Dialog.Message("100!", "100!");
    end;
    
    default = function()
        Dialog.Message("Ehh", "I don't know");
    end;
};

switch(cases, 100);

[Ulrich]

Yes, I was thinking something like this:

[COLOR="#008000"]--[[
switch(a) {
  case 1: x = 5;
      y = 7;
      z = 9;
      break;
      
  case 2: x = 3;
      y = 3;
      z = 0;
      break;
      
  case 3: x = 5;
      y = 2;
      z = 3;
      break;
      
  default: x = 1;
      y = 2;
      z = 3;
}
--]][/COLOR]

[COLOR="#0000FF"]local[/COLOR] tSwitch [COLOR="#FF0000"]=[/COLOR] [COLOR="#FF0000"]{};[/COLOR]
tSwitch[COLOR="#FF0000"][[/COLOR][COLOR="#000000"]1[/COLOR][COLOR="#FF0000"]][/COLOR] [COLOR="#FF0000"]=[/COLOR] [COLOR="#FF0000"]{[/COLOR] x [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]5[/COLOR][COLOR="#FF0000"];[/COLOR] y [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]7[/COLOR][COLOR="#FF0000"];[/COLOR] z [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]9[/COLOR] [COLOR="#FF0000"]};[/COLOR]
tSwitch[COLOR="#FF0000"][[/COLOR][COLOR="#000000"]2[/COLOR][COLOR="#FF0000"]][/COLOR] [COLOR="#FF0000"]=[/COLOR] [COLOR="#FF0000"]{[/COLOR] x [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]3[/COLOR][COLOR="#FF0000"];[/COLOR] y [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]3[/COLOR][COLOR="#FF0000"];[/COLOR] z [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]0[/COLOR] [COLOR="#FF0000"]};[/COLOR]
tSwitch[COLOR="#FF0000"][[/COLOR][COLOR="#000000"]3[/COLOR][COLOR="#FF0000"]][/COLOR] [COLOR="#FF0000"]=[/COLOR] [COLOR="#FF0000"]{[/COLOR] x [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]5[/COLOR][COLOR="#FF0000"];[/COLOR] y [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]2[/COLOR][COLOR="#FF0000"];[/COLOR] z [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]3[/COLOR] [COLOR="#FF0000"]};[/COLOR]

[COLOR="#0000FF"]function[/COLOR] switch(a) 
  [COLOR="#0000FF"]if[/COLOR] (tSwitch[COLOR="#FF0000"][[/COLOR]a[COLOR="#FF0000"]][/COLOR] [COLOR="#FF0000"]~=[/COLOR] [COLOR="#0000FF"]nil[/COLOR]) [COLOR="#0000FF"]then[/COLOR]
    [COLOR="#008000"]-- case[/COLOR]
    [COLOR="#0000FF"]return[/COLOR] tSwitch[COLOR="#FF0000"][[/COLOR]a[COLOR="#FF0000"]].[/COLOR]x[COLOR="#FF0000"],[/COLOR] tSwitch[COLOR="#FF0000"][[/COLOR]a[COLOR="#FF0000"]].[/COLOR]y[COLOR="#FF0000"],[/COLOR] tSwitch[COLOR="#FF0000"][[/COLOR]a[COLOR="#FF0000"]].[/COLOR]z[COLOR="#FF0000"];[/COLOR]
  [COLOR="#0000FF"]else[/COLOR]
    [COLOR="#008000"]-- default[/COLOR]
    [COLOR="#0000FF"]return[/COLOR] [COLOR="#000000"]1[/COLOR][COLOR="#FF0000"],[/COLOR] [COLOR="#000000"]2[/COLOR][COLOR="#FF0000"],[/COLOR] [COLOR="#000000"]3[/COLOR][COLOR="#FF0000"];[/COLOR]
  [COLOR="#0000FF"]end[/COLOR]
[COLOR="#0000FF"]end[/COLOR]

a [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]2[/COLOR][COLOR="#FF0000"];[/COLOR]
x[COLOR="#FF0000"],[/COLOR] y[COLOR="#FF0000"],[/COLOR] z [COLOR="#FF0000"]=[/COLOR] switch(a)[COLOR="#FF0000"];[/COLOR]
Paragraph[COLOR="#FF0000"].[/COLOR]SetText([COLOR="#800080"]"Paragraph1"[/COLOR][COLOR="#FF0000"],[/COLOR] [COLOR="#800080"]"x="[/COLOR][COLOR="#FF0000"]..[/COLOR]x[COLOR="#FF0000"]..[/COLOR][COLOR="#800080"]", y="[/COLOR][COLOR="#FF0000"]..[/COLOR]y[COLOR="#FF0000"]..[/COLOR][COLOR="#800080"]", z="[/COLOR][COLOR="#FF0000"]..[/COLOR]z)[COLOR="#FF0000"];[/COLOR]

Really not the best, but a possible approach, depending on the situation.

Ulrich