In any programming language (like php, java, javascript etc) is it possible to dynamically create a changing number of variables in a loop, within a given name space?
for example, if I want to create N variables that have random numbers between 1 and 5, which are to be called random1, random2 .. randomN, is it possible to do something like:
loop ( N ){<br>
create variable randomN = random(1,5);<br>
}
In PHP you could use variable variables:
$N = 5;
for ($i = 0; $i != $N; ++$i) {
${"random$i"} = rand(1, 5);
}
In JavaScript, same thing:
var N = 5;
for (var i = 0; i != N; ++i) {
window['random' + i] = Math.round(Math.random() * 5);
}
Though, I would recommend using a "container" to hold those variables, so that they're not created globally.
Or you can use $$, see variable variables.
for ($n = 1; $n <= 5; $n++) {
$varName = 'random' . $n;
$$varName = rand(1, 5);
}
$vars = get_defined_vars();
var_dump($vars);
Related
Hey guys I'm new to Game Maker Studio and new to the language. I'm making a game and have been working on the dialogue system.
This chunk of code was designed for characters respond to a set of choices, the dialogue starts by printing out the first element of the line_array, which it does, then give the player the choice of two responses from the response_array, which it insteads prints out the second element of the line_array and I don't understand why.
Does an argument only hold one element of an array? I'm initializing two arrays in an object oCivilian2 and pushing them through code DialogueCode which is linked to another object oRespond that supposed to allow me to sift through dialogue in game. Anything helps thanks
It's initialized here in create of oCivilian2
line_array = [3];
line_array[0] = "Ethan it's good to see you! \n I thought after the incident well.... \n well I thought we had lost you";
line_array[1] = "I've said too much";
line_array[2] = "You hit your head trying to saver her\n It was horrible";
response_array = [2];
response_array[0] = "What happened?";
response_array[1] = "I don't recall alot. How bad was it?";
counter = 0;
x1 = RESOLUTION_W / 2;
y1 = RESOLUTION_H -70;
x2 = RESOLUTION_W/2;
y2 = RESOLUTION_H;
_print = "";
responseSelected = 0;
Then the step which links it to DialogueCode when spacebar is pressed
keyActivate = keyboard_check_pressed(vk_space);
if (keyActivate)
{
var inst = collision_rectangle(oPlayer.x+3,oPlayer.y+3,oPlayer.x-3,oPlayer.y-3, oCivilian2, false, false);
if (inst != noone)
{
ScriptExecuteArray(DialogueCode, line_array);
ScriptExecuteArray(DialogueCode, response_array);
}
}
Then through to step in the object oRespond
lerpProgress += (1 - lerpProgress) / 50;
textProgress += global.textSpeed;
x1 = lerp(x1, x1Target,lerpProgress);
x2 = lerp(x2, x2Target,lerpProgress);
keyUp = (keyboard_check_pressed(vk_up)) || (keyboard_check_pressed(ord("W")))
keyDown = keyboard_check_pressed(vk_down) || keyboard_check_pressed(ord("S"));
responseSelected += (keyDown - keyUp);
var _max = 2;
var _min = 0;
if (responseSelected > _max) responseSelected = _min;
if (responseSelected < _min) responseSelected = _max;
for (var i = 0; i < 2; i++)
{
var _marker = string_pos(",", response);
if (string_pos(",",response))
{
responseScript[i] = string_copy(response,0,_marker);
string_delete(response,0,_marker);
var _marker = string_pos(",", response);
}
else
{
responseScript[i] = string_copy(response,0, string_length(response));
}
}
if (keyboard_check_pressed(vk_space))
{
counter++;
}
Then to print in oRespond
/// text
//response
NineSliceBoxStretched(sTextBox, x1,y1,x2,y2, 0);
draw_set_font(fText);
draw_set_halign(fa_center);
draw_set_valign(fa_top);
draw_set_color(c_black);
if (counter % 2 == 0)
{
var _i = 0;
var _print = string_copy(text,1,textProgress);
draw_text((x1+x2) / 2, y1 + 8, _print);
draw_set_color(c_white);
draw_text((x1+x2) / 2, y1 + 7, _print);
_i++;
}
else
{
if (array_length_1d(responseScript) > 0)
{
var _print = "";
for (var t = 0; t < array_length_1d(responseScript); t++)
{
_print += "\n";
if (t == responseSelected) _print += "--> "
_print += responseScript[t];
show_debug_message(responseScript[t]);
if (t == responseSelected) _print += " <-- "
}
draw_text((x1+x2) / 2, y1 + 8, _print);
draw_set_color(c_white);
draw_text((x1+x2) / 2, y1 + 7, _print);
}
}
Alright, i think to see many problems with your code.
First of all, since arrays in GM are dynamic declare them like
line_array[3]
is a bad practice (in my point of view)
I've never declared an array this way in GM so that could be the problem here.
Second, i don't really understand the logic of your code, always create objects, at least in the GM environment, that corresponds to "physical" entities, i would make an object for the Civilian but not for the "respond".
I've red your code a lot of times and since no one answered you in 3 months i can assume it's because no one can really understand your way of coding, and this way of coding will probably give you a lot of problems in future. The thing that you're trying to doing could be super-easy if done with a good hierarchy.
I would like to help u with this code, but i find it very chaotic.
If you've not resolved this problems, write a comment :)
I advice you to fully re-implement it even if resolved anyway.
I'm trying to find a solution to this coding problem:
Create a for loop that will begin with a value of 5 and end with a value of 25. In each iteration, add the incrementing value to mathTotal. (HINT: the last value used INSIDE the loop should be 25)
But the way I can think of doing it returns with a final number for mathTotal of 26. I'm not sure how to manipulate the code to stop at 25 without actually doing the math to figure out what number to make the condition for the program to stop running.
This is what I have:
int mathTotal;
for(int i = 5; mathTotal <=25; i++) {
mathTotal = mathTotal + i;
}
I know this is a simple problem, but I'm learning how to code and don't want to move on without fully understanding something.
Thank you!
There are two major issues:
mathTotal is not initialized. You have to set an initial value.
int mathTotal = 0;
The upper border (the second parameter of the for loop) is defined as mathTotal <= 25 – rather than i <= 25 – which will be reached when i is 8.
for (int i = 5; i <=25; i++) {
mathTotal = mathTotal + i;
}
The traditional for loop in Objective-C is inherited from standard C and takes the following form:
for (/* Instantiate local variables*/ ; /* Condition to keep looping. */ ; /* End of loop expressions */)
{
// Do something.
}
For example, to print the numbers from 1 to 10, you could use the for loop:
for (int i = 1; i <= 10; i++)
{
NSLog(#"%d", i); //do something
}
This is logically equivilant to the following traditional for loop:
for (int i = 0; i < [yourArray count]; i++)
{
NSLog([myArrayOfStrings objectAtIndex:i]);
}
Your Doubt
int mathTotal = 0;
for (i = 5 = 0; i <=25 ; i++)
{
mathTotal = mathTotal + i;
}
I'm trying to query a user to select from 4 or more sets of radio buttons where there are 5 buttons in each set (Processing 2+). Where I'm having trouble is taking the array created by selecting from each set of buttons and getting it to fill columns in a matrix where the elements can be queried and the 2D array can be printed and ultimately written as csv or tab txt file.
import controlP5.*;
ControlP5 controlP5;
RadioButton c0;
RadioButton c1;
RadioButton c2;
RadioButton c3;
int cols = 5;
int rows = 4;
int[][] myArray = new int[cols][rows];
void setup() {
size(600,650);
controlP5 = new ControlP5(this);
c0 = controlP5.addRadioButton("ch0",60,60)
.setSize(20,20)
.setItemsPerRow(5)
.setSpacingColumn(50)
.addItem("c03", 1)
.addItem("c04", 2)
.addItem("c05", 3)
.addItem("c0AM", 4)
.addItem("c0AF", 5)
;
c1 = controlP5.addRadioButton("ch1",60,80)
.setSize(20,20)
.setItemsPerRow(5)
.setSpacingColumn(50)
.addItem("c13", 1)
.addItem("c14", 2)
.addItem("c15", 3)
.addItem("c1AM", 4)
.addItem("c1AF", 5)
;
c2 = controlP5.addRadioButton("ch2",60,100)
.setSize(20,20)
.setItemsPerRow(5)
.setSpacingColumn(50)
.addItem("c23", 1)
.addItem("c24", 2)
.addItem("c25", 3)
.addItem("c2AM", 4)
.addItem("c2AF", 5)
;
c3 = controlP5.addRadioButton("ch3",60,120)
.setSize(20,20)
.setItemsPerRow(5)
.setSpacingColumn(50)
.addItem("c33", 1)
.addItem("c34", 2)
.addItem("c35", 3)
.addItem("c3AM", 4)
.addItem("c3AF", 5)
;
}
void draw() {
background(0);
}
void controlEvent(ControlEvent theEvent) {
if(theEvent.isGroup() && theEvent.name().equals("ch0") || theEvent.name().equals("ch0") || theEvent.name().equals("ch2") || theEvent.name().equals("ch3")){
println(theEvent.name());
println(theEvent.arrayValue());
//float t=float(theEvent.arrayValue());
//int[][] = { {float getGroup(),float[] getArrayValue()}, {3,2,1,0}, {3,5,6,1}, {3,8,3,4} };
//int cols = 4;
//int rows = 5;
//int[][] myArray = new int[cols][rows];
// Two nested loops allow us to visit every spot in a 2D array.
// For every column I, visit every row J.
//for (int i = 0; i < cols; i++) {
// for (int j = 0; j < rows; j++) {
//myArray[i][j] = float(theEvent.arrayValue);
}
}
You were mixing different things together. Also you don't need to check whole array and store this information. Just update clicked button. Here is new version of your controlEvent
void controlEvent(ControlEvent theEvent) {
int cols = 4;
int rows = 5;
int[][] myArray = new int[cols][rows];
switch(theEvent.getId()){
case 0:
myArray[0][(int)theEvent.value()-1] = 1;
break;
case 1:
myArray[1][(int)theEvent.value()-1] = 1;
break;
case 2:
myArray[2][(int)theEvent.value()-1] = 1;
break;
case 3:
myArray[3][(int)theEvent.value()-1] = 1;
break;
}
println("==== " + theEvent.getId() + " ===");
println(myArray[theEvent.getId()]);
}
To do this simple switch you need to add ID parameter to all your radio buttons like this:
c3 = controlP5.addRadioButton("ch3", 60, 120)
.setId(3)
.setSize(20, 20)
...
I don't know how exactly you want use this array so my implementation use it as local variable so it will be deleted every time this event is called but this could be avoided by declaring array as global variable and then deleting only updated column.
How Can I bind for example int value to the statement below?
System::String^ Content = "just example";
int iAValue = 5;
lblOutput_{iValue}->Text = Content;
You don't; you use an array or collection of some sort. This sort of thing is often attempted by beginners. It is not possible, nor is it a good idea to tie your program logic to the names of your variables.
auto labels = gcnew List<Label>();
labels->Add(lblOutput1);
labels->Add(lblOutput2);
labels->Add(lblOutput3);
labels->Add(lblOutput4);
labels->Add(lblOutput5);
// ...
String^ Content = "just example";
int iAValue = 4;
labels[iAValue].Text = Content;
And then later you can iterate over all of them easily:
for(int i = 0; i < labels->Count; ++i) {
// i is the label "number"
// labels[i] is the label
}
While doing some work for my lab in university
I am creating this function where there is a for loop inside another one.
It is not important to know what the method is used for. I just can't figure out why the program doesn't enter the second for loop. This is the code:
public void worseFit(int[] array){
int tempPosition = -1;
int tempWeight = 101 ;
for (int x = 0; x < (array.length - 1); x++){
if (allCrates.getSize() < 1){
Crate crate = new Crate();
crate.addWeight(array[0]);
allCrates.add(crate);
} else{
for( int i = 1; i < (allCrates.getSize() - 1); i++ ){
Crate element = allCrates.getElement(i);
int weight = element.getTotalWeight();
if (weight < tempWeight){
tempWeight = weight;
tempPosition = i;
Crate crate = new Crate();
if (weight + tempWeight <= 100){
crate.addWeight(weight + tempWeight);
allCrates.setElement(i, crate);
} else {
crate.addWeight(weight);
allCrates.setElement(allCrates.getSize(), crate);
} // if
} // if
} // for
} // if
} // for
} // worseFit
Once the program enters the else part of the code it goes straight
away back to the beginning of the first for loop.
Would anyone know how to solve this problem?
There seems to be some discrepancies with the expected values of allCrates.getSize().
If allCrates.getSize() returns 2, it will go to the second for loop, but not run it, as i < allCrates.getSize() - 1 will result in false
You might want to use <= instead of <
Initialize the variable i in your second loop to 0 instead of 1. Because if your getSize() returns 1 the it will not enter the if part and after entering the else part the for loop condition will evaluate to false and hence your for loop will not be executed.