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object Main extends App {
	val str = "$(foo) == 123 AND $(bar) == 321"
	val p = """(?<=\$\()[^()]*""".r
	print (p.findAllIn(str).toList)
}

Success #stdin #stdout 0.37s 322496KB

stdin

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Standard input is empty

stdout

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List(foo, bar)

https://ideone.com/wbnEuI

language:

Scala (scala 2.12.8)

created:

visibility:

secret

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