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in Technique[技术] by (71.8m points)

Scala: write string to file in one statement

For reading files in Scala, there is

Source.fromFile("file.txt").mkString

Is there an equivalent and concise way to write a string to file?

Most languages support something like that. My favorite is Groovy:

def f = new File("file.txt")
// Read
def s = f.text
// Write
f.text = "file contents"

I'd like to use the code for programs ranging from a single line to a short page of code. Having to use your own library doesn't make sense here. I expect a modern language to let me write something to a file conveniently.

There are posts similar to this, but they don't answer my exact question or are focused on older Scala versions.

For example:

See Question&Answers more detail:os

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It is strange that no one had suggested NIO.2 operations (available since Java 7):

import java.nio.file.{Paths, Files}
import java.nio.charset.StandardCharsets

Files.write(Paths.get("file.txt"), "file contents".getBytes(StandardCharsets.UTF_8))

I think this is by far the simplest and easiest and most idiomatic way, and it does not need any dependencies sans Java itself.


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