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I read the "what's new in XCode6" in https://developer.apple.com/xcode/. And the article introduce some new feature about XCode6, and it say:"Command Line Xcode’s debugger includes an interactive version of the Swift language, known as the REPL (Read-Eval-Print-Loop). Use Swift syntax to evaluate and interact with your running app or write new code in a script-like environment. The REPL is available from within LLDB in Xcode’s console, or from Terminal." I want to know how to get the REPL?

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Xcode6 is not released and under NDA. You should ask at developer.apple.com/devforums. –  cahn 3 hours ago
    
Actually, this year there is no NDA so you discuss details. You just can't review it –  Kaan Dedeoglu 1 hour ago
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sudo xcode-select -switch /Applications/Xcode6-Beta.app/Contents/Developer

xcrun swift
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it works, thanks. –  riven 2 hours ago
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