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Scripting: can’t get a comparison between a folder name and a string to work
Dear community,
I have a really simple ExtendScript-example that I just can’t get to work and I have no idea what could be wrong. I’m trying to write a script that goes through all the items in the project panel and stores references to all the folders which names are like “layer1”, “layer2”, and so on, in an array. This is the code that should alert 3 times in my case, but it doesn’t alert once..
for (var i=1; i<=app.project.numItems; i++)
{
if ((app.project.item(i) instanceof FolderItem) && (app.project.item(i).name == "layer"+i))
{
alert("found folder = " + app.project.item(i).name);
}
}Inside the project in the root-directory there are 2 comps and 3 folders named ‘layer1’, ‘layer2’ and ‘layer3’ – so I should see 3 alerts when executing the above script. For testing-purposes I changed the second part of the if-statement to a ‘static’ value like so:
&& (app.project.item(i).name == "layer1"))
> ..then it works! But I need a dynamic solution..Thanks very much for ANY help in advance!
Greetings,
Sebastian -
4 Replies
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If you have some folders named “layer”+number, the number in question needs not be equal to the item index.
Xavier.
(the r in the string is actually a carriage return (backslash r). Couldn’t figure out how to print it correctly in the code window)
var tag = "layer", N = tag.length;
var s = "", layerFolders = [];
for (var i=1; i<=app.project.numItems; i++)
{
if (app.project.item(i) instanceof FolderItem && app.project.item(i).name.indexOf(tag) === 0)
{
if (isNaN(parseFloat(app.project.item(i).name.slice(N)))) continue;
s += "item " + i + " is a folder with name " + app.project.item(i).name +"r";
// alert("found layer folder: item " + i + " has name " + app.project.item(i).name);
layerFolders.push(i);
}
}
s = "Found " + layerFolders.length + " items:rr" + s;
alert(s); -
Ok, I have the solution > credit goes to David Torno and chauffeurdevan over on the adobe-forums!
> I made quite an error in logic when comparing the strings because the numbered layers do not necessary have to match the current i-value in the for-loop. As soon as there are items BEFORE the numbered layer-folders in the project panel, or items IN those numbered folders, the item-index and ‘i’ don’t match anymore..
Here’s a very nice RegExp-solution for this:
if ((app.project.item(i) instanceof FolderItem) && (new RegExp(/^layer\d+/).test(app.project.item(i).name))) ....(C) by chauffeurdevan -
Thank you, Xavier, for your help! A very nice solution! 🙂
I also found another solution in the meantime – have a look at my posting below. -
Indeed, much more compact and adaptable !
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