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copied!<p><strong>IntelliJ IDEA:</strong></p> <ol> <li>Run in debug mode or attach a remote debugger</li> <li>Set a breakpoint and run until you reach it</li> <li>Open <code>Evaluate Expression</code> (<kbd>Alt</kbd>+<kbd>F8</kbd>, in menu: Run -> Evaluate Expression) window to run arbitrary Scala code.</li> <li>Type what code fragment or expression you want to run and click on Evaluate</li> <li>Type <kbd>Alt</kbd>+<kbd>V</kbd> or click on Evaluate to run the code fragment.</li> </ol> <p><img src="https://i.imgur.com/0A4n4fg.png" alt=""></p> <p><strong>Eclipse:</strong></p> <p>As of Scala 2.10 both <code>break</code> and <code>breakIf</code> have been removed from <code>ILoop</code>.</p> <p>To break into interpreter you will have to work with <code>ILoop</code> directly.</p> <p>First add <code>scala compiler</code> library. For Eclipse Scala, right click on project => <code>Build Path</code> => <code>Add Libraries...</code> => <code>Scala Compiler</code>.</p> <p>And then you can use the following where you want to start the interpreter:</p> <pre><code>import scala.tools.nsc.interpreter.ILoop import scala.tools.nsc.interpreter.SimpleReader import scala.tools.nsc.Settings val repl = new ILoop repl.settings = new Settings repl.settings.Yreplsync.value = true repl.in = SimpleReader() repl.createInterpreter() // bind any local variables that you want to have access to repl.intp.bind("row", "Int", row) repl.intp.bind("col", "Int", col) // start the interpreter and then close it after you :quit repl.loop() repl.closeInterpreter() </code></pre> <p>In Eclipse Scala the interpreter can be used from the <code>Console</code> view:</p> <p><img src="https://i.imgur.com/ssG7bLi.png" alt=""></p>

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