Hi all,

Unfortunately, Javascript isn't my first (programming) language and I'm struggling to get to grips with creating a simple plain text file from a script. I've spent hours staring at the JS Object Model Reference (http://synchro.net/docs/jsobjs.html) and I just cannot work it out.

This is what I've got so far:

var f = new File('test.txt');
file.open('w');
file.writeln('Line 1');
file.writeln('Line 2');
file.close();

I've tried the file.open(file_exists(file.name) ? 'r+':'w+'); line mentioned
in the documentation and I just cannot get this to work.

Any code suggestions would be welcome!

Thanks,

Lab Rat.


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Re: Writing to a text file
By: Lab Rat to All on Thu Feb 06 2014 11:55 pm

Hi all,

Unfortunately, Javascript isn't my first (programming) language and I'm struggling to get to grips with creating a simple plain text file from a script. I've spent hours staring at the JS Object Model Reference (http://synchro.net/docs/jsobjs.html) and I just cannot work it out.

This is what I've got so far:

var f = new File('test.txt');
file.open('w');
file.writeln('Line 1');
file.writeln('Line 2');
file.close();

"file" is not defined in that example. I think you meant to write f.open(), f.writeln(), and f.close().

I've tried the file.open(file_exists(file.name) ? 'r+':'w+'); line
mentioned in the documentation and I just cannot get this to work.

Replacing "file" with "f" in your example seems to work fine for me (creates a file "test.txt" with the 2 lines you have specified).

Any code suggestions would be welcome!

Your code looks fine (except for the file/f confusion I mentioned). It might be
confusing to you that the file being created/written will be located in your Synchronet "ctrl" directory since you did not specify a full pathname for the file.

There are many examples in the exec/*.js files which open/modify files. You could look at those for some tips or inspiration as well.

digital man

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Re: Writing to a text file
By: Lab Rat to All on Thu Feb 06 2014 23:55:22

var f = new File('test.txt');
file.open('w');
file.writeln('Line 1');
file.writeln('Line 2');
file.close();

this actually looks fine to me... you can try checking whether or not the file.open() was successful ala var didItOpen = file.open('w');

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Re: Writing to a text file
By: Digital Man to Lab Rat on Thu Feb 06 2014 17:46:13

"file" is not defined in that example. I think you meant to write f.open(), f.writeln(), and f.close().

Ah, that makes a lot of sense! See, Java isn't my best programming language!

There are many examples in the exec/*.js files which open/modify files. You could look at those for some tips or inspiration as well.

I tried looking through a good few but being all wrapped up in functions with arrays, I just got even more confused - but makes sense now.

Thanks DM, all working fine now. Most appreciated.

Lab Rat.


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Re: Writing to a text file
By: MCMLXXIX to Lab Rat on Thu Feb 06 2014 21:09:09

this actually looks fine to me... you can try checking whether or not the file.open() was successful ala var didItOpen = file.open('w');

As DM said, I needed to use the variable that I had declared as a file, not just the word 'file'. All working now though, thanks for the reply!

Lab Rat.


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Re: Writing to a text file
By: Lab Rat to MCMLXXIX on Fri Feb 07 2014 11:05:58

As DM said, I needed to use the variable that I had declared as a file, not just the word 'file'. All working now though, thanks for the reply!

well, it's good that he was paying attention.. clearly i wasn't :D

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"file" is not defined in that example. I think you meant to write f.open(), f.writeln(), and f.close().

Ah, that makes a lot of sense! See, Java isn't my best programming
language!

That code is JavaScript, not Java.

Nightfox

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Re: Writing to a text file
By: Lab Rat to All on Thu Feb 06 2014 11:55 pm

var f = new File('test.txt');
file.open('w');
file.writeln('Line 1');
file.writeln('Line 2');
file.close();

I've tried the file.open(file_exists(file.name) ? 'r+':'w+'); line
mentioned in the documentation and I just cannot get this to work.

Since you're not specifying a path, I think it goes in the ctrl directory.

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Re: Writing to a text file
By: Deuce to Lab Rat on Fri Feb 07 2014 11:39:30

Since you're not specifying a path, I think it goes in the ctrl directory.

I was looking all over for it (including ctrl directory) and it wasn't working. All working fine now with the f... (or whatever I declare) as opposed to file...

Lab Rat


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