[amibroker] Re: How to implement: VarSelect( var1, var2, var3, ... , Varn, n);

["liberte721" <daniel.laliberte@xxxxxxxxx>]

Small bug in my "cold" (heh):  The "js = GetScriptObject();" line 
needs to be moved to after the <% ... %> script block.  It worked for 
me where it was because I had a previous script block.


--- In amibroker@xxxxxxxxxxxxxxx, "liberte721" <daniel.laliberte@xxx> 
wrote:
>
> You can use jscript to pass any number of arguments and select a 
> value.  I provide two ways in the cold that follows.  The first way 
> (selectVar) selects an AFL variable by its name and returns that.  
I 
> did this because I thought we could only pass simple numbers and 
> strings to functions, but we can pass AFL arrays as well, so the 
> second function, selectValue, selects the nth value and returns 
that.
> 
> Keep in mind that all your expressions will be evaluated, thus 
> increasing the computation time.  It might be better to follow the 
> suggestion to conditionally evaluate only the code you need.
> 
> EnableScript("jscript");
> // Get script object to access the functions.
> js = GetScriptObject();
> 
> <%
> function selectVar( n )
> // Return the value of the AFL variable named by the nth argument 
> after n, origin 0.
> {
> 	var args = arguments;
> 	var selectVarName = args[ n + 1 ];
> 	var value = AFL(selectVarName);
> 	return value;
> }
> 
> function selectValue( n )
> // Return the nth value after n.
> // Values can be numbers or arrays.
> {
> 	var value = arguments[ n + 1 ];
> 	return value;
> }
> %>
> 
> // Assign number or array to each variable
> foo0 = 0; 
> foo1 = barindex();
> foo2 = Close;
> 
> myvar = js.selectVar(1, "foo0", "foo1", "foo2");
> //Plot(myvar, "my var", colorBlack, styleOwnScale);
> 
> myval = js.selectValue(2, 0, barindex(), Close);
> Plot(myval, "myval", colorRed, styleOwnScale);
>




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