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‘For’ Loop and Try/Catch Block
I use the effect Layer Control. But When set ‘None’ results in an error. I used a ‘For’ loop to collect the three effect used; So I want to associate the Try / Catch Block to prevent these errors. I try this expression, but no work. Thanks.
// Variables
var t=thisComp.layer("Less");
var a=t.effect("Scale")("Layer").name;
var b=t.effect("Position")("Layer").name;
var c=t.effect("Side")("Layer").name;
var e=["a","b","c"];
// For Loop
for (var i=0; i<e.length; i++){
}
// Try/Catch Block
try{
i;
}catch(err){
i=0;
} -
2 Replies
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I’m not sure what you’re trying to do exactly, but this statement, for example:
var a=t.effect(“Scale”)(“Layer”).name;
will generate an error when the layer control is set to None. So you need to surround it with try/catch. The question is though, what do you put into variable a when this happens?
try{
var a = t.effect("Scale")("Layer").name;
}catch(err){
var a = ???
}
But do you really need the name of the layer selected by the control, or could you defer accessing the layer control until you need to get a value?
Dan
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Hey Dan, you have a good intuition.
Same not knowing exactly what I wanted, by me not knowing express myself right, managed to give me the road that would lead to the right.
So I was able.Thank You Very Much! Always very efficient.
// This is the main part of where were the problem in expression.
var a="Scale";
var b="Position";
var c="Side";
var names=[a, b, c];
for (var i=0; i<names.length; i++){
try{
var e = t.effect(names[i])("Layer").name;
}catch(err){
var e = 0;
}
}
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