2
$\begingroup$

I want to import txt file with empty line at the end and special characters. I tried many options from the documentation. "String" option detects the empty line but it does not recognise special characters.

file = ParentDirectory@$UserDocumentsDirectory<>"\\Downloads\\nekineki.txt";

Export[file,"123 abc 🐶🐱\n"];
SystemOpen@file;

Import@file
Import[file,"String"] 

Out:

enter image description here

What is the right way to import this?

I'm using Mathematica 13.1 and Windows 11.

$\endgroup$
0

2 Answers 2

1
$\begingroup$

It seems that the trailing "\n" is being dropped. I have a verbose workaround.

expStr = ExportString["123 abc 🐶🐱\n", "Text"];

Then

StringJoin[
 StringRiffle[
  ImportString[#, "Text"] & /@
   StringSplit[
    ImportString[expStr, "String"]
    , "\n", All]
  , "\n"
  ]
 ]
"123 abc 🐶🐱
"

As I said it is verbose; room for improvement.

$\endgroup$
1
  • $\begingroup$ This isn't a workaround for a dropped \n, but rather forces a \n to the end of every read file. Even files that don't have a final \n will receive one here. $\endgroup$
    – Roman
    Sep 20, 2022 at 11:15
2
$\begingroup$

On macOS it works via ReadByteArray and ByteArrayToString:

file = "\\tmp\\nekineki.txt";

Export[file, "123 abc 🐶🐱\n"];

ByteArrayToString[ReadByteArray[file]]
(*    "123 abc 🐶🐱\n"    *)

We can define a reader function:

myread = ByteArrayToString@*ReadByteArray;

myread[file]
(*    "123 abc 🐶🐱\n"    *)

Or, following @GalZoidberg's advice, for Windows we can do

myread = StringDelete["\r"]@*ByteArrayToString@*ReadByteArray;

to make sure we don't end up with lingering \r\n patterns.

$\endgroup$
1
  • 1
    $\begingroup$ This also works. On windows it's just a slight difference, so you do StringDelete[myread[file], "\r"] at the end. $\endgroup$ Sep 20, 2022 at 6:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.