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Topic: pass array name to class method? (Read 317 times) |
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vlorch
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pass array name to class method?
« on: Jan 2nd, 2005, 10:20pm » |
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hi all, i am new to this and would appreciate a pointer in the right direction.
i am trying to write a class method, that can accept int and and int[] array as argument. but i'm having trouble.
say my method is defined
void myMethod (int x, int z, int[] s) {
s[1] = x + z;
}
then i call the class
myClass.myMethod(1, 2, myArray[])
i'm getting told that an expression is expected after the myArray[] call. what am i doing wrong.
thanks in advance to those that can show me the error of my ways.
vlorch
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st33d
 
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Re: pass array name to class method?
« Reply #1 on: Jan 2nd, 2005, 11:27pm » |
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Funny you should need to pass a whole array to a function. I only need to do that when doing a deep copy of the array to expand it. Just a reference to a single integer as opposed to asking for the whole array would do, depends on what you're trying to do though.
I've provided an example of a class passing arrays in and out of a method. I don't get any grief because I don't stick the array brackets "[]" in when calling the function. I hope this is of some help.
Code:
one thing;
int [] anotherArray = new int[1];
void setup(){
thing = new one();
anotherArray[0] = 1;
}
void draw(){
thing.meth(3,thing.myArray);
thing.meth(2,anotherArray);
println(thing.myArray[0]);
println(anotherArray[0]);
}
class one {
int [] myArray = new int[1];
one(){
myArray[0] = 1;
}
void meth (int x, int[] s) {
s[0] = x;
}
}
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I could murder a pint.
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vlorch
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Re: pass array name to class method?
« Reply #2 on: Jan 3rd, 2005, 10:35am » |
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thanks. that was it, dropping the '[]' when calling it. *smacks forehead*
is it funny to be doing this? i'm not intending to create an array with the method, just a reference to an existing one. anyway, seems to be doing what i want now. on to the next hurdle 
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st33d
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Re: pass array name to class method?
« Reply #3 on: Jan 3rd, 2005, 1:40pm » |
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I was just referring to the example you gave. My programs are so short I never have to pass arrays to functions anyway.
Code:
//funny
void meth1(int x, int[] y){
y[0] += x;
}
//not funny
void meth2(int x, int y)
y += x;
}
//not funny
void meth3(int x int[] y){
for (int i = 0; i < y.length; i++){
y[i] += x;
}
}
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I could murder a pint.
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