I have a csv file which contains the numbers of buttons. I want to make a function that reads these numbers and set the number of a class that I have made and called FButton.
First I have declared an array of FButtons in my header file.
FButton buttons[10];
Now in the cpp file I have written the following code to set the numbers of the buttons:
QFile f("Buttons.csv");
if (f.open(QIODevice::ReadOnly))
{
int i=0;
QString data;
data = f.readAll();
QStringList vals = data.split(';');
while (!vals.isEmpty())
{
buttons[i].setNumber(vals[0].toInt());
vals.removeAt(0);
i++;
}
f.close();
}
The function setNumber is given by:
void FButton::setNumber(int butNumber)
{
number=butNumber;
}
It is possible for me to build the code, but when i try to run it an error occurs:
GUI.exe is no longer working.
Can somebody tell me what is wrong with my code?
Wouldn't you have more values in your CSV than the size of buttons array (or whatever collection it is) ? Or having uninitialized objects in buttons ?
Related
I hope this isn't too simple a question for the group. I am teaching myself Swift but I'm really struggling to get my head around a way to read a CSV text file containing a mixture of Int and Double values into a 2d array which sits inside a Class where each line in the array represents a line from the input file. I have successfully loaded an 1d array of strings, each element corresponding to a line of text in the CSV file. However I want to save time by going direct from input file to 2d array of decimals.
Read in the data. Separate the text into lines. Separate the lines into tokens. Convert each token to an Int or if it fails, a Double.
I assume you know how to read the files so here is an example with a static CSV string:
let text = """
1,2,3.0
4,5.0,6,z
"""
enum CustomError: Error {
case notAnItOrADouble(String)
}
do {
let numberRows = try text
.split(separator: "\n")
.map { line in
try line.split(separator: ",").map { substring -> Any in
let token = String(substring)
guard let value: Any = Int(token) ?? Double(token) else {
throw CustomError.notAnItOrADouble(token)
}
return value
}
}
numberRows.forEach { row in
row.forEach { number in
print("\(number) is \(type(of: number))")
}
}
} catch (let error) {
print(error)
}
Output:
1 is Int
2 is Int
3.0 is Double
4 is Int
5.0 is Double
6 is Int
Try putting in a string instead of an int or double and you will see that you get the error with he first unparsable token instead.
This is my first year of vex. I am taking on the role of programmer.
I have had this idea for rapid autonomous creation, recording the driver. Instead of the usual array/debugger dump of raw streams of power levels, I had the idea of extracting functions from driver movement.
I wont go into the details, and I can code it myself, but I need some help.
There is one thing I am unable to do simply because of my lack of coding experience.
I want to create a for loop that checks every joystick button one by one.
For example:
struct button
{
bool pressed;
}
for(int i = 0; i>12; i++) //12 is number of buttons on the joystick
{
struct button button<cycle through buttons>;
}
I want there to then be:
struct button button6U;
struct button button6D;
struct button button6R;
etc.
Then, I want this:
for(int i = 0; i>12; i++) // 12 is number of buttons on the joystick
{
if(VexRT[<currentButton>])
{
button<currentButton>.pressed = true;
}
}
I have no idea how to do this, with a wildcard modifing the actual variable name I am writing to.
A couple thoughts:
A for statement would have no idea how to advance the order of joystick buttons. So something I think I might need is:
orderOfButtons
{
VexRT[6U];
VexRT[6D];
VexRT[6R];
// etc.
}
I just cant seem to figure out how to have a variable defining what VexRT[]button I am reading from.
Any help would be appreciated!
Thanks.
Sounds like you want an array:
#define NUMBER_OF_BUTTONS 12
...
struct button VexRT[NUMBER_OF_BUTTONS];
If you want to use symbolic constants to refer to specific buttons in the array, you can use an enumeration:
enum btn_id { BTN_6U, // maps to 0
BTN_6D, // maps to 1
BTN_6R, // maps to 2
...
}
Enumeration constants are represented as integers, and by default they start at 0 and increment by 1. You can initialize them to different values if you want, and multiple enumeration constants can map to the same value. I take advantage of this when I want to identify a "first" and "last" enumeration for looping, like so:
enum btn_id {
BTN_6U,
BTN_FIRST = BTN_6U, // both BTN_FIRST and BTN_6U will map to 0
BTN_6D,
BTN_6R,
...
BTN_whatever,
BTN_LAST
};
Thus, VexRT[BTN_6U] maps to VexRT[0], VexRT[BTN_6D] maps to VexRT[1], etc.
Note that this way, you don't have to loop through all the buttons just to set one:
enum btn_id currentButton = BTN_6D;
...
VexRT[currentButton].pressed = true;
If you do want to loop through the whole set, you can use
for ( enum btn_id i = BTN_FIRST; i < BTN_LAST; i++ )
{
VexRT[i].pressed = false;
}
So, what you want is to sample the user input (at some specified rate), then record it into an array, then play that back at a later time? If you have functions that drive the VEX (I'm not familiar with that), each of which are associated with an input, you can use an array of function pointers to create your output.
#define MAX_ACTION 12
#define MAX_RECORDED 200
// Declare your array of function pointers
int (*action[MAX_ACTION])(void);
// Declare your stored array of recorded actions
int recorded[MAX_RECORDED];
...
// Assign function pointers to associated functions
action[0] = go_forward;
action[1] = turn_right;
...
// Record your actions into some array
while (...)
{
// Record the action
recorded[i++] = get_action();
// Sample delay
}
...
// Playback the actions
for (i=0;i<RECORDED;i++)
{
(*action[recorded[i]])();
// delay here
}
P.S. Your for loop is backward (i<12 not i>12).
I think you are trying to access the events coming from the joystick. You can just loop through the array of values and record them. I think the channels on the joystick are simply accessed like: vexRT[x] where x is 1-12. If you just want to store the latest value from each channel you could do this:
int value[12];
for(i=0; i<12; i++)
{
value[i] = vexRT[i];
}
If you want to store all of the values so that you can map them or play them back or something then you will need a more complex data structure to store them, like a list of the value arrays.
I also have found documentation that says the values are accessed by like vexRT[Chx] where x is 1-12, so you could alternatively create a string and use it to access the joystick channels inside your loop:
string *s = (char *)malloc(5*sizeof(char)); //5 is the max length of the null terminated string
for() . . . {
sprintf(s,"Ch%d", i);
value[i] = vertRT[s];
}
Im getting more and more frustrated on why this is not doing what i want to. I need to have a text file that logs the last 10 buttons the user pressed, i tried in two ways but…
…this code only saves the last button pressed:
String [][] buttonsPressed = { {"Pressed one"}, {"Pressed two"} };
String[] sum;
void setup() {
size(700, 350);
sum = loadStrings("scores.txt");
}
void draw() {
}
void keyPressed() {
if ((key=='1')) {
saveStrings("scores.txt", buttonsPressed[0]);
}
if ((key=='2')) {
saveStrings("scores.txt", buttonsPressed[1]);
}
if ((key == ENTER)) {
printArray(sum);
}
}
…this code saves the buttons pressed but overwrites itself when i run the sketch again (probably has something to do with createWriter):
PrintWriter sum;
void setup() {
size(700, 350);
sum = createWriter("scores.txt");
}
void draw() {
}
void keyPressed() {
if ((key=='1')) {
sum.println("pressed one");
}
if ((key=='2')) {
sum.println("pressed two");
}
if ((key == ENTER)) {
sum.flush();
sum.close();
String[] lines = loadStrings("scores.txt");
for (int i = 0; i <= 9; i++) {
printArray("[" + i + "] " + lines[i]);
}
}
}
Is there a simple way to do this without using libraries ? Please get me in the right direction :)
Break your problem down into smaller steps.
Step 1: At the beginning of your program, read in the existing history file. Store them in some kind of data structure, like an array or an ArrayList.
Step 2: Make the data structure keep track of the last 10 buttons pressed. You'll need to write code that adds the newest button pressed to the end of the data structure, and if the data structure contains more than 10 items, you have to remove the oldest item. Maybe do this in a separate example sketch where you just print the data structure to the console and don't worry about outputting it to a file just yet.
Step 3: Output the data structure to a file. You don't have to worry about appending to the file because your data structure contains the entire history, so you can just overwrite the file with the entire data structure. You'll probably want to do this every time the data structure changes. Again, maybe do this in a separate example program before worrying about where the data is coming from: maybe make a program that outputs an array of random numbers every time the user clicks?
Focus on one small step at a time, and try creating small example programs for each step. Then when you get stuck, you can ask a specific question and provide an MCVE, and we'll go from there. Good luck.
I am stuck doing this even though I know it's very simple. Yet, I am getting errors.
What I have:
I have 3 arrays.
1st Array contains objects of UpgradeButton class.
2nd Array contains objects of BuyButtonclass.
3rd Array named newCostlyShops contains Numbers.
BuyButton class and UpgradeButton class, both have a shopCode member which is a number; the number which I'm trying to equate.
What I'm trying to do:
My goal is to first look for BuyButton and UpgradeButton objects in the respective arrays which have shopCodes same as those in newCostlyShops.
After that, I removeChild() that object and splice it out from the array.
My Code:
Array 3:
var newCostlyShops:Array = new Array();
newCostlyShops = Object(root).WorkScreen_mc.returnCostlyShops();
trace(newCostlyShops); // this is tracing out the exact shopCodes I want and is working fine.
Deletion and Splicing codes:
for (looper = 0; looper < upgradeButtonsArray.length; looper++) {
for (var secondLooper: int = 0; secondLooper < newCostlyShops.length; secondLooper++) {
if (upgradeButtonsArray[looper].shopCode == newCostlyShops[secondLooper]) {
trace(looper);
trace(upgradeButtonsArray[looper]);
removeChild(upgradeButtonsArray[looper]);
upgradeButtonsArray.splice(looper, 1);
}
}
}
for (looper = 0; looper < buyButtonsArray.length; looper++) {
for (secondLooper = 0; secondLooper < newCostlyShops.length; secondLooper++) {
if (buyButtonsArray[looper].shopCode == newCostlyShops[secondLooper]) {
trace(looper);
trace(buyButtonsArray[looper]);
removeChild(buyButtonsArray[looper]);
buyButtonsArray.splice(looper, 1);
}
}
}
What's wrong with this Code:
I keep getting error
TypeError: Error #1010: A term is undefined and has no properties.
This error comes only after the 1st time this code is run and not the first time it is run. When I remove the removeChild and splice , this traces out objects that are not null, ever. Even after this whole function is called 100 times, the error is not shown. Only when I removeChild and use splice this occurs.
Is there something wrong with what I'm doing? How to avoid this error? This is throwing the whole program haywire. If there is any other alternative to this method, I'm open to take those methods as well as long as I don't get errors and my goal is reached.
It might sounds funny, but.... try to decrement looper after splicing.
trace(looper);
trace(upgradeButtonsArray[looper]);
removeChild(upgradeButtonsArray[looper]);
upgradeButtonsArray.splice(looper, 1);
looper--;
I think after splicing the array all item's are being shifted and you're skipping next one.
Also, you should get some more information with this error, like which class/line is throwing it. Maybe you need to enable "permit debugging" or something?
Bonus suggestion:
For newCostlyShops use Dictionary instead of Array so you won't have to nest for inside for...
I want to Loop through the array of integers and want to remove the items in the TLToProcess list which i have stored in the array of integers
here is the code
I want to remove only the selected in the list integer
iSize.add(TLToProcess.size());
if(TLToProcess[i].Scan_In1__c==null)
{
if(TLToProcess[i].typew__c=='Pending')
{
TLForMissingHHhh.add(TLToProcess[i]);
}
}
else if ( c[i].Scan_In1__c!=null)
{
if (TLToProcess[i].typew__c=='Pending' )
{
TLToProcess[i].typew__c='Processed';
}
}
}
Now i want to remove record 1 by 1 from TLToProcess using
remove() can any body tell me how to do it.
Thanks
Anu
Not sure I understand your problem, but if what you're trying to avoid is modifying your List of integers inside a loop and getting this error: {"Collection was modified; enumeration operation may not execute."} you can create a copy of your List(.ToList()) and use it to iterate, and this way you can call Remove() safely.
List<Int32> arr = new List<Int32>();
for (int i = 0; i < 10; i++)
{
arr.Add(i);
}
foreach(var o in arr.ToList())
{
arr.Remove(o);
}
Is that the intent?