Expression to search for layer name and toggle visibility

Question

Hello,I have comp which has layers like this:1_LayerBlue2_LayerBlue1_LayerRed2_LayerRed2_LayerYellow The number is basically id of which group layer belongs.I would like to create a control on opacity:if layer name has 2100else 0 And then I would create dropdown menu, what controls which layers are wanted.But what I'm stuck at is how to make it search for only part of the name. I'm not an expert on writing these, so help is really appreciated. Would really like learn more &#128578;

Mathias Moehl · Accepted Answer

The solution of @Paul Tuersley is probably what you want.
In your example I can see that you have the number always at the very beginning of the layer name. If you only want to look at numbers at the beginning, you can replace the "> -1" check by "==0". This code only returns 100, if the "2" occurs at the very beginning of the layer name (and I also search for "2_" instead of "2", such that a "21_Layer..." is not interpreted as a layer of group 2):

if (thisLayer.name.indexOf("2_") == 0) {100} else {0}

Paul Tuersley · Answer

Something like this maybe:if (thisLayer.name.indexOf("2") > -1) {100} else {0} .indexOf() will return the first character position if the search term is found in the string, or -1 if not found, so this is saying  'if the result of a search for 2 is greater than -1'.

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