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Check if file already exists and if is directory #53

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Merged
merged 1 commit into from
Sep 19, 2025
Merged

Check if file already exists and if is directory #53

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9 changes: 8 additions & 1 deletion src/main/scala/introprog/IO.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -37,9 +37,16 @@ object IO:
* @param text the text to be written to the file.
* @param fileName the path of the file.
* @param enc the encoding of the file.
* @param isOverwrite should the file be overwritten if it already exists
* */
def saveString(text: String, fileName: String, enc: String = "UTF-8"): Unit =
def saveString(text: String, fileName: String, enc: String = "UTF-8", isOverwrite: Boolean = false): Unit =
val f = new java.io.File(fileName)

if !isOverwrite then
require(!f.exists(), s"The file $fileName already exists. To overwrite it, set isOverwrite=true.")

require(!f.isDirectory(), "The file you're trying to write to can't be a directory.")

val pw = new java.io.PrintWriter(f, enc)
try pw.write(text) finally pw.close()

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