Created
September 4, 2025 15:16
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| import java.io.{BufferedReader, BufferedWriter, FileReader, FileWriter} | |
| def withFileWriter(filename: String) (handler: BufferedWriter => Unit): Unit = { | |
| val writer = new BufferedWriter(new FileWriter(filename)) | |
| try handler(writer) | |
| finally writer.close() | |
| } | |
| def withFileReader(filename: String) (handler: BufferedReader => Unit): Unit = { | |
| val reader = new BufferedReader(new FileReader(filename)) | |
| try handler(reader) | |
| finally reader.close() | |
| } | |
| withFileWriter("Hello.txt") { | |
| writer => { writer.write("Hello\n"); writer.write("World!") } | |
| } | |
| var result: String = "" | |
| withFileReader("Hello.txt") { | |
| reader => { result = reader.readLine() + "\n" + reader.readLine() } | |
| } | |
| assert(result == "Hello\nWorld!") |
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