Question with Store text in a String

Programming Questions

renasweets

Question with Store text in a String

in Programming Questions • 5 months ago

Hello!

I can't quite figure out why when I run the code below I get the error message The function size() does not exist. When I comment out this code the sketch runs, but the words do not fade out.

The objective is draw a black rectangle over the words currently on the stage so the words fade out randomly.

The draw syntax is from Jer Thorp's tutorial: http://blog.blprnt.com/blog/blprnt/updated-quick-tutorial-processing-twitter#idc-cover

Any suggestions are very much appreciated!

String words = "The sun is shining The weather is sweet Makes me want to move my dancing feet";
String[] list = split(words, ' ');
void setup() {
size(550,550);
background(0);
smooth();
}
//Draw a faint black rectangle over what is currently on the stage so it fades over time.
void draw() {
fill(0,1);
rect(0,0,width,height);
//Draw a word from the list of words
//int i = (frameCount % words.size());
//String words = words.get(i);
//Put it somewhere random on the stage, with a random size and colour
fill(255,random(50,150));
textSize(random(10,30));
text(words, random(width), random(height));
}

Replies(7)

Chrisir

Re: Question with Store text in a String

5 months ago

size() is for arraylist

for arrays use length pls

without () iirc

renasweets

Re: Question with Store text in a String

5 months ago

Thanks for the reply. When I switch out line 18 to int i = (frameCount % words.length); // and removing the ()

I get the error words.length cannot be resolved. Do I need to convert the string to an array? Could you show me what that would look like while still allowing the text to fade out?

Thanks again for your help!

PhiLho

Re: Question with Store text in a String

5 months ago

I think you want list.length, actually.

renasweets

Re: Question with Store text in a String

5 months ago

Yes! that pushed me along.

Processing is now telling me that I can't use get(int) on the array type String. Any advice on how to get around this? I'm a noob and any help is appreciated. excited to learn. thanx!

String words = "The sun is shining The weather is sweet Makes me want to move my dancing feet";
String[] list = split(words, ' ');
void setup() {
size(550,550);
background(0);
smooth();
}
//Draw a faint black rectangle over what is currently on the stage so it fades over time.
void draw() {
fill(0,1);
rect(0,0,width,height);
//Draw a word from the list of words
int i = (frameCount % list.length);
String words = list.get(i);
//Put it somewhere random on the stage, with a random size and colour
fill(255,random(50,150));
textSize(random(10,30));
text(words, random(width), random(height));
}

PhiLho

Re: Question with Store text in a String

5 months ago

Well, what do you expect get() to do?
If you want to pick up the ith word, then again, it is list you want: words is a monolithic entity, you used split() on it to get this list of word, so that's the data to use: String word = list[i];
Note that I used "word" instead of "words": it makes sense, since there is only one, and it avoids to hide the global words variable.

Ah, I see now the code you pasted was a step in the right direction (contradicting your screenshot!), but you missed the array syntax.
get(i) syntax is for ArrayList, a slightly different entity.

renasweets

Re: Question with Store text in a String

5 months ago

Ah wow! I get it! Thanks so much for the clear explanation. Things are starting to click.

I still don't understand how to make multiple words fade out.

In the current code under draw I use

fill(0,1);

rect(0,0,width,height);

to draw over each word, but this does not fade out the words as I hoped. Instead they accumulate.

When I use

background(0, 1);

It draws one word at a time.

Is there a way to view multiple words at a time and have them eventually fade out after a second or two?

Thanks again for all your help!

String words = "The sun is shining The weather is sweet Makes me want to move my dancing feet";
String[] list = split(words, ' ');
void setup() {
size(550,550);
background(0);
smooth();
frameRate(1);
}
//Draw a faint black rectangle over what is currently on the stage so it fades over time.
void draw() {
fill(0,1);
rect(0,0,width,height);
background(0, 1);
//Draw a word from the list of words
int i = (frameCount % list.length);
String word = list[i];
//Put it somewhere random on the stage, with a random size and colour
fill(255,random(50,150));
textSize(random(10,30));
text(word, random(width), random(height));
}

PhiLho

Re: Question with Store text in a String

5 months ago

To view multiple words, you have to use a for loop over a given range, or all the list.

Top Reply