Save a text file with no line breaks?

Programming Questions

prismspecs

Save a text file with no line breaks?

in Programming Questions • 24 days ago

I'm opening up a binary file, converting to 1's and 0's, then outputting as a text file. Problem is, it gives me a line break after each byte, bummer! Any way around this?

// Open a file and read its binary data
byte b[] = loadBytes("whatever.dmg");

String[] lines = new String[b.length];
for (int i = 0; i < b.length; i++) {
lines[i] = binary(b[i]);
}

saveStrings("lines.txt", lines);
exit(); // Stop the program

Replies(7)

tfguy44

Re: Save a text file with no line breaks?

24 days ago

There's no need to put byte on it's own line:

// Open a file and read its binary data
byte b[] = loadBytes("whatever.dmg");

String[] lines = new String[1];
lines[0] = "";
for (int i = 0; i < b.length; i++) {
lines[0] += binary(b[i]);
}

saveStrings("lines.txt", lines);
exit(); // Stop the program

prismspecs

Re: Save a text file with no line breaks?

24 days ago

Works!

Interesting side note, though: it's waaay slower this way, likely because of the way we are adding and adding to the variable.

tfguy44

Re: Re: Save a text file with no line breaks?

24 days ago

Yeah, I knew it'd be slower. I just post working code and then let GoToLoop optimize it for me.

GoToLoop

Re: Save a text file with no line breaks?

24 days ago

A much faster version using StringBuilder:

Interesting note: OUTPUT file's size is len*8 + 1 or str.capacity() + 1; due to LF added by saveStrings().

// http://forum.processing.org/topic/save-a-text-file-with-no-line-breaks

final String INPUT = "bluej", OUTPUT = "binary.txt";

final byte b[] = loadBytes(INPUT);
final int  len = b.length;
final StringBuilder str = new StringBuilder(len*8);

for ( int i = 0; i != len; str.append(binary(b[i++])) );

saveStrings( dataPath(OUTPUT), new String[] {str.toString()} );

println(len);
println(str.capacity());

exit();

GoToLoop

Re: Save a text file with no line breaks?

24 days ago

Yea! I like to optimize a lot!

Anyways, a modded version which adds a space after each binary sequence:

// http://forum.processing.org/topic/save-a-text-file-with-no-line-breaks

final String INPUT = "bluej", OUTPUT = "binary.txt";

final byte b[] = loadBytes(INPUT);
final int  len = b.length;
final StringBuilder str = new StringBuilder(len*9);

for ( int i = 0; i != len; str.append(binary(b[i++])).append(' ') );

saveStrings( dataPath(OUTPUT), new String[] {str.toString()} );

println(len);
println(str.capacity());

exit();

prismspecs

Re: Save a text file with no line breaks?

23 days ago

You are amazing, this is perfect! I had no idea StringBuilder existed.

Thanks much

EDIT: If you don't mind, could you explain what's going on with

```
, new String[] {str.toString()} 
```

It's just syntax I'm unfamiliar with :o

This is great code... I didn't know about dataPath either!

PhiLho

Re: Save a text file with no line breaks?

23 days ago

saveStrings() wants an array of strings, and you want an array with only one entry, to have only one line.
new String[] creates a new array of Strings.
This syntax can take a static array to init it. The part with { } just does that.
Sometime, you can see:
new String[] { "foo", "bar" }
Here, there is no literal string, but a string created out of the StringBuilder.

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