example: ``` inputDir.walk() .filter { it.isFi...
# stdlib
j
example:
Copy code
inputDir.walk()
    .filter { it.isFile && it.name.endsWith(".txt") }
    .peek { println("Moving $it to $outputDir") }
    .forEach { moveFile(it, File(outputDir, it.toRelativeString(inputDir))) }
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