asymmetrical 2D array

General Discussion Other

helmutapp..

in General Discussion • Other • 9 months ago

Hello,

I wonder if I could get an index number on a 2D array I am working with.

The array is asymmetrical, and I would like to enumerate how many items there are (not nulls)

I'm bringing in a text file with comma separated strings, the 2D Array is from a list like this;

fact, more fact, some more facts

text, more text, yet more text, too much text

bits, more bits

Would I use a nested for loop and count them somehow?

Replies(9)

Chrisir

Re: asymmetrical 2D array

9 months ago

double for-loop is correct
use length to determine the length of that array.
see
http://www.processing.org/reference/Array.html

no problem

Chrisir

Re: asymmetrical 2D array

9 months ago

e.g.

(I realize men is not really a 2D array but to show the trick)

Copy code

//
String[] men = {
"Chernenko ] Andropov ] Brezhnev", "C ] Av", "Chernenko ] Andropov ] Brezhnev ] 33 ] poep"
};
for (int i=0; i<men.length; i++) {
String[] list = split(men[i], " ] ");
//
print(list.length+": ");
// list.length is different every time:
for (int j=0; j<list.length; j++) {
print (list [j] + " -- ");
} // for j
//
println ();
println ("------------------------");
//
} // for i

gives you

3: Chernenko -- Andropov -- Brezhnev --
------------------------
2: C -- Av --
------------------------
5: Chernenko -- Andropov -- Brezhnev -- 33 -- poep --
------------------------

helmutapp..

Re: asymmetrical 2D array

9 months ago

Thanks Chrisir,

And over the holidays as well :)

I'll give that a try, cheers.

helmutapp..

Re: asymmetrical 2D array

9 months ago

Hi,

It seems easy seeing the values printed in the rows above, but I am having trouble conceptualizing it in this asymmetrical 2D String array I have.

I'd like to have the number of total strings in the array. Just one number saying the number of total strings.

I see the values coming through per row above, but I can't seem to make the leap to adding these up, I cant say why.

I've been looking at the code below on the web, and I believe I should be doing a sum of an array of int row values, but cannot get it.

I can show you my own code trying this, but its horrible, ...any guidance?

Copy code

//for importing grid files into a 2d array
//by che-wei wang
String rows[] = loadStrings("List.txt");
String [][] grid;
int cols=0;
//calculate max width of grid file
for (int i=0; i < rows.length; i++) { //rows
String [] chars=split(rows[i],','); //strip out to rows [i]
if (chars.length>cols){ //if greater than 0
cols=chars.length; //set width to
}
}
//create grid array based on # of rows and columns in grid file
grid = new String [rows.length][cols];
//parse values into 2d array
for (int i=0; i < rows.length; i++) {
String [] temp = new String [rows.length];
temp= split(rows[i], ',');
for (int j=0; j < temp.length; j++){
grid[i][j]=temp[j];
}
}

Chrisir

Re: [WatchList] asymmetrical 2D array

9 months ago - via EMail-to-forum

I like your Code. It looks good.

Can't you say

Copy code

counter++;

After line 25 / second last line
to count the Strings??

Also you can loop the outer array and add up the length of the inner array.

Chrisir

Re: asymmetrical 2D array

9 months ago

like this...

Copy code

//for importing grid files into a 2d array
//by che-wei wang
String rows[] = loadStrings("List.txt");
String [][] grid;
int cols=0;
//calculate max width of grid file
for (int i=0; i < rows.length; i++) { //rows
String [] chars=split(rows[i], ','); //strip out to rows [i]
if (chars.length>cols) { //if greater than 0
cols=chars.length; //set width to
}
}
//create grid array based on # of rows and columns in grid file
grid = new String [rows.length][cols];
//
int count=0;
//parse values into 2d array
for (int i=0; i < rows.length; i++) {
String [] temp = new String [rows.length];
temp= split(rows[i], ',');
for (int j=0; j < temp.length; j++) {
grid[i][j]=temp[j];
count++;
}
} // for
println ("Strings in total: " + count );

Chrisir

Re: asymmetrical 2D array

9 months ago

for

fact, more fact, some more facts
text, more text, yet more text, too much text
bits, more bits

here ..............

Copy code

//for importing grid files into a 2d array
//by che-wei wang
String rows[];
String [][] grid;
int cols=0;
//
void setup() {
size(800, 800);
rows = loadStrings(dataPath("List.txt"));
//calculate max width of grid file
for (int i=0; i < rows.length; i++) { //rows
String [] chars=split(rows[i], ','); //strip out to rows [i]
if (chars.length>cols) { //if greater than 0
cols=chars.length; //set width to
}
}
//create grid array based on # of rows and columns in grid file
grid = new String [rows.length][cols];
//
int count=0;
//parse values into 2d array
for (int i=0; i < rows.length; i++) {
String [] temp = new String [rows.length];
temp= split(rows[i], ',');
for (int j=0; j < temp.length; j++) {
grid[i][j]=temp[j];
count++;
}
} // for
println ("Strings in total: " + count );
}
//
void draw() {
background (0);
for (int i=0; i < grid.length; i++) {
for (int j=0; j < grid[i].length; j++) {
if (grid[i][j]!=null)
text (grid[i][j], j*130+70, i * 30 + 40);
}
}
}

helmutapp..

Re: asymmetrical 2D array

9 months ago

nice one :)

Chrisir

Re: asymmetrical 2D array

9 months ago

Thank you!

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