org.icongarden.fileSystem.remove, which, unsurprisingly, removes entries from the file system. The path to the directory entry is specified as the single argument to the function in the usual style of array. If the entry is a directory which is not empty, the function throws an exception. Otherwise, the entry is removed. (If you need to remove a directory which contains files, use enumerateDirectory to discover all the children and then remove the deepest ones first. I'll probably write a script extension later to do this.)UNIX allows the removal of a file while it is open and Windows doesn't. Consequently, if you want to write a cross-platform script, you'll need to remove files only when you think they aren't open. (They may of course have been opened by some program other than your script, but you can only do your best and handle exceptions appropriately.)
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