What is the recommended idiom for creating a new file in the same directory as another with better.files?

问题

I'm enjoying the "better.files" library in my scala scripts, and one of the common operations (for me) is to create a new file in the same directory as an existing file. My first attempt turns out to be rather verbose and ugly, so I'm wondering if there's a better idiom.

To be specific, here's a bash script that's the equivalent of what I'm wanting to do in scala:

#!/bin/bash
SRC="$HOME/Downloads/some-file.txt"
SRCDIR=$(dirname "$SRC")
DST="$SRCDIR/another-file.txt"
echo "hello!" > "$DST"

In order to accomplish the same thing using the better.files library, here's what I have so far:

#!/usr/bin/env scalaRunner

import better.files._
import better.files.Dsl._
import java.io.{File => JFile}

val SRC = File.home/"Downloads"/"some-file.txt"
val SRCDIR = SRC.parent
val DST = new JFile(SRCDIR.toJava,"another-file.txt").toScala
DST.overwrite("hello!\n")

It's almost as concise and readable as the bash script, although it would be nice if conversions to and from java.io.File could be hidden. Of course I can always create implicit converters to do just that, but maybe there's a better alternative.

Although there's nothing wrong with explicit conversions, I'm mostly wanting to avoid doing this if there's already a less verbose way to do the equivalent.

For anyone wanting to experiment, both of the above scripts should be executable as-is, assuming the $SRC file already exists, etc. A working 'scalaRunner' script can be found here:

https://stackoverflow.com/a/50361608/666886

It assumes that the better-files jar resides in your classpath, as described in the linked answer.

回答1:

how about this:

val src = File.home/"Downloads"/"betterfiles" / "document.jpg"
val srcDir = src.parent
val dst: File = srcDir.createChild("another-file.txt")
dst.overwrite("hello!\n")

来源：https://stackoverflow.com/questions/51387919/what-is-the-recommended-idiom-for-creating-a-new-file-in-the-same-directory-as-a