Select words in text between sepecific characters

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telmo.bac..

Select words in text between sepecific characters

in General Discussion • Other • 8 months ago

Hi, i have a big text file, and i need to select from that text file only words that are between specific characteres, lets say : ";;" and ";"

so, for example , if i have this in my txt file :

kjhas lkjaslk slks ;;agge ; lkjqwe lkjjk tal ws ;;qv ; jhr

i need to select "agge" and "qv" because both words are between ";;" and ";"

Which is the easiest way of doing this in processing?

thanks

Telmo

Replies(4)

Chrisir

Re: Select words in text between sepecific characters

8 months ago

hello

there are possibly different approaches.

One could be:

do a split() at ;;

you get a resulting array A

Now for-loop over A with a var i
and use indexOf to determine the pos P of ; in each member of A (which is A[i] )
now use subString to get the start of A[i] to the ; and put into a String s

String s = A[i].subString (0,P);

Now you can store s in an ArrayList B using add
http://www.openprocessing.org/sketch/81729

see reference for all used commands

see the list here :
http://processing.org/reference/String.html

not tested

Greetings, Chrisir

telmo.bac..

Re: Select words in text between sepecific characters

8 months ago

Hi, i been trying to code this following Chrisir instructions .

I got it pretty much working but the problem i have is that when use " indexOf(";"); " in an array item that doesnt has the ";" i get as result -1.

And when i apply (-1) to subString i get an error.

How can i fix this?

Is there any way of discard the items in my array that doesnt has the ";"

any idea?

String men = "kjhas lkjaslk slks ;;agge ; lkjqwe lkjjk tal ws ;;qv ; jhr";
String[] list = split(men, ";;");
println(list);
String s;
int p;
ArrayList<String> o = new ArrayList();
for (int i = 0; i < 3 ; i++)
{
p = list[i].indexOf(";");
println(p);
s = list[i].substring (0,p );
o.add(s);
}
println(o);

Chrisir

Re: Select words in text between sepecific characters

8 months ago

well done!

here...

list.length gives you the length of the array you get by using split()

String men = "kjhas lkjaslk slks ;;agge ; lkjqwe lkjjk tal ws ;;qv ; jhr";
String[] list = split(men, ";;");
println(list);
String s;
int p;
ArrayList<String> o = new ArrayList();
for (int i = 0; i < list.length ; i++)
{
s="";
p = list[i].indexOf(";");
println(p);
if (p>-1) {
s = list[i].substring (0,p );
o.add(s);
}
}
println(o);

[0] "kjhas lkjaslk slks "
[1] "agge ; lkjqwe lkjjk tal ws "
[2] "qv ; jhr"
-1
5
4
[agge , qv ]

Chrisir

Re: Select words in text between sepecific characters

8 months ago

you might want to use

http://processing.org/reference/trim_.html

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