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Topic: converting ascii to int (Read 730 times) |
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thetourist3
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converting ascii to int
« on: Oct 13th, 2004, 5:33am » |
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hi i am a newbie and am interested in converting ascii text to integers from a website i am parsing... something that in java is along the lines of using string tokenizer and intValue... i just wondered how i would do this. thanks.
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fry
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Re: converting ascii to int
« Reply #1 on: Oct 14th, 2004, 3:19am » |
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you can do the same thing in processing.. either you can use a StringTokenizer and intValue(), or in rev 68, there's splitStrings() that will do the work of a StringTokenizer (it's called split() in rev 69).
rev 70 and higher (not yet publicly released) have even better support for this sort of thing too, so that it's a bit easier.
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thetourist3
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Re: converting ascii to int
« Reply #2 on: Oct 15th, 2004, 8:22am » |
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awesome. look forward to using this and playing with the newer versions. thanks for the response.
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thatbrock
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Re: converting ascii to int
« Reply #3 on: Oct 15th, 2004, 5:31pm » |
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Err. Maybe I am a bit dense, but I don't understand how to use splitStrings() in rev68 to tokenize a string.
I am trying to read in a file using String lines[] = loadStrings("foo.txt"); and to use numbers stored in this file as integers. Doesn't like it at all. The strings are stored in the array, but i can't use them as integers, and of course I can't just simply cast them.
Also, I am using a simple loop to stuff the array, but I can't use splitStrings() within that loop.
Any advice would be really helpful!
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fry
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Re: converting ascii to int
« Reply #4 on: Oct 15th, 2004, 6:13pm » |
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loadStrings() will give you the contents of the file as an array of String objects, one line per array element:
http://processing.org/reference/loadStrings_.html
if each line contains only ints, separated by spaces, use splitInts() to turn that line into an array of ints.
http://processing.org/reference/splitInts_.html
if only part of the line contains ints, first use splitStrings() to separate things into an array of String objects
http://processing.org/reference/splitStrings_.html
then do Integer.parseInt() on each one that you want to use:
i.e. if the first column is a word, then the others are ints:
String lines[] = loadStrings("foo.txt");
for (int i = 0; i < lines.length; i++) {
String pieces[] = split(lines[i]); // split on space chars
String rowName = pieces[0];
for (int j = 1; j < pieces.length; j++) {
int num = Integer.parseInt(pieces[j]);
println("next number is " + num);
}
}
hope that helps.
for what it's worth (or people that are curious) in future releases we're gonna try and get a 'foreach' structure in there so you don't have to count up to lines.length by hand, and casting will work on strings, so this line:
int num = Integer.parseInt(pieces[j]);
will change to:
int num = int(pieces[j]);
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thatbrock
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Re: converting ascii to int
« Reply #5 on: Oct 16th, 2004, 5:59am » |
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Thanks Fry for the fast reply!
For furture readers, the code you provided above, works if you make the change below since split is not a method:
String pieces[] = split(lines[i]); // split on space chars
Change to:
String pieces[] = splitStrings(lines[i]); // split on space chars
Such a fast response, a typo musta slipped in!
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