I initialized the array to check if the program is running fine.
But now I want the array "long[][] input" to be initialized by taking the whole table from the database. How can I do this??
Something like this... (not tested but hopefully it either works or inspires you)
But I think you can't guarantee that the columns will be read in the order you want... not sure... maybe you should do additional processing to see what is the number associated to the name of the column... but you can based your work on this
List<Tuple> precedences = selectFrom(precedence).list();
long[][] input new long[a][b];//calculate a and b yourself:)
int row=0;
int col=0;
for (Tuple t : precedences) {
col=0;
precedence.getColumns().forEach(col->{
String colName = col.getMetadata().getName();
if (!colName.equals("al_id")) {
input[row][col]=(long)t.get(col);
col++;
}
});
row++;
}
Related
I am trying to set up a search system for a database where each element (a code) in one table has tags mapped by a Many to many relationship. I am trying to write a controller, "search" where I can search a set of tags which basically act like key words, giving me an element list where the elements all have the specified tags. My current function is incredibly naive, basically it consists of retrieving all the codes which are mapped to be a tag, then adding those a set, then sorting the codes by how many times the tags for each code is found in the query string.
public List<Code> naiveSearch(String queryText) {
String[] tagMatchers = queryText.split(" ");
Set<Code> retained = new HashSet<>();
for (int i = 0; i < Math.min(tagMatchers.length, 4); i++) {
tagRepository.findAllByValueContaining(tagMatchers[i]).ifPresent((tags) -> {
tags.forEach(tag -> {
retained.addAll(tag.getCodes());
}
);
});
}
SortedMap<Integer, List<Code>> matches = new TreeMap<>();
List<Code> c;
for (Code code : retained) {
int sum = 0;
for (String tagMatcher : tagMatchers) {
for (Tag tag : code.getTags()) {
if (tag.getValue().contains(tagMatcher)) {
sum += 1;
}
}
}
c = matches.getOrDefault(sum, new ArrayList<>());
c.add(code);
matches.put(sum, c);
}
c = new ArrayList<>();
matches.values().forEach(c::addAll);
Collections.reverse(c);
return c;
}
This is quite slow and the overhead is unacceptable. My previous trick was a basically retrieval on the description for each code in the CRUDrepository
public interface CodeRepository extends CrudRepository<Code, Long> {
Optional<Code> findByCode(String codeId);
Optional<Iterable<Code>> findAllByDescriptionContaining(String query);
}
However this is brittle since the order of tags in containing factors into whether the result will be found. eg. I want "tall ... dog" == "dog ... tall"
So okay, I'm back several days later with how I actually solved this problem. I used hibernate's built in search library which has a very easy implementation in spring. Just paste the required maven coordinates in your POM.xml and it was ready to roll.
First I removed the manytomany for the tags<->codes and just concatenated all my tags into a string field. Next I added #Field to the tags field and then wrote a basic search Method. The method I wrote was a very simple search function which took a set of "key words" or tags then performed a boolean search based on fuzzy terms for the the indexed tags for each code. So far it is pretty good. My database is fairly small (100k) so I'm not sure about how this will scale, but currently each search returns in about 20-50 ms which is fast enough for my purposes.
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];
}
I'm collecting rows of answers from a database which are made in to arrays. Something like:
for (var i:int = 0; i < event.result.length; i++) {
var data = event.result[i];
var answer:Array = new Array(data["question_id"], data["focus_id"], data["attempts"], data["category"], data["answer"], data["correct"], data["score"]);
trace("answer: " + answer);
restoreAnswer(answer, i);
}
Now, if I trace answer, I typically get something like:
answer: 5,0,2,IK,1.a,3.1,0
answer: 5,0,1,IK,2.a,3.1,0
answer: 4,1,1,AK,3,3,2
From this we see that focus_id 0 (second array item) in question_id 5 (first array item) has been attempted twice (third array item), and I only want to use the last attempt in my restoreAnswer function.
My problem is that first attempt answers override the second attempts since the first are parsed last it seems. How do I go about only calling my restoreAnswer only when appropriate?
The options are:
1 attempts, correct score (2 points)
2 attempts, correct score (1 points)
1 attempt, wrong score (0 points)
2 attemps, wrong score (0 points)
There can be multiple focus_id in each question_id.
Thank you very much! :)
I would consider having the DB query return only the most recent attempt, or if that doesn't work efficiently, return the data in attempt order. You may score question 5 twice, but at least it'll score correctly on the last pass.
You can also filter or sort the data you get back from the server.
Michael Brewer-Davis suggested using the database query to resolve this; normally speaking, this would be the right solution.
If you wait until you get it back from the web method call or whatever in AS3, then consider creating an additional Vector variable:
var vAttempts:Vector.<Vector.<int>> = new Vector.<Vector.<int>>(this.m_iNumQuestions);
You mentioned that it seems that everything is sorted so that earlier attempts come last. First you want to make sure that's true. If so, then before you do any call to restoreAnswer(), you'll want to check vAttempts to make sure that you have not already called restoreAnswer() for that question_id and focus_id:
if (!vAttempts[data["question_id"]])
{
vAttempts[data["question_id"]] = new Vector.<int>(); // ensuring a second dimension
}
if (vAttempts[data["question_id"]].indexOf(data["focus_id"]) == -1)
{
restoreAnswer(answer, i);
vAttempts[data["question_id"]].push(data["focus_id"]);
}
So optimizing this just a little bit, what you'll have is as follows:
private final function resultHandler(event:ResultEvent):void {
var vAttempts:Vector.<Vector.<int>> = new Vector.<Vector.<int>>(this.m_iNumQuestions);
var result:Object = event.result;
var iLength:int = result.length;
for (var i:int = 0; i < iLength; i++) {
var data = result[i];
var iQuestionID:int = data["question_id"];
var iFocusID:int = data["focus_id"];
var answer:Array = [iQuestionID, iFocusID, data["attempts"],
data["category"], data["answer"], data["correct"], data["score"]];
trace("answer: " + answer);
var vFocusIDs:Vector.<int> = vAttempts[iQuestionID];
if (!vFocusIDs) {
vAttempts[iQuestionID] = new <int>[iFocusID];
restoreAnswer(answer, i);
} else if (vFocusIDs.indexOf(iFocusID) == -1) {
restoreAnswer(answer, i);
vFocusIDs.push(iFocusID);
}
}
}
Note: In AS3, Arrays can skip over certain indexes, but Vectors can't. So if your program doesn't already have some sort of foreknowledge as to the number of questions, you'll need to change vAttempts from a Vector to an Array. Also account for whether question IDs are 0-indexed (as this question assumes) or 1-indexed.
I have a few different question and i have decided to put them in one. So the first question : If i have one and the same code(for example):
buttonsA.buton1a.addEventListener(MouseEvent.MOUSE_DOWN , buton1a_function);
buttonsA.buton2a.addEventListener(MouseEvent.MOUSE_DOWN , buton2a_function);
buttonsA.buton3a.addEventListener(MouseEvent.MOUSE_DOWN , buton3a_function);
buttonsA.buton4a.addEventListener(MouseEvent.MOUSE_DOWN , buton4a_function);
buttonsA.buton5a.addEventListener(MouseEvent.MOUSE_DOWN , buton5a_function);
buttonsA.buton6a.addEventListener(MouseEvent.MOUSE_DOWN , buton6a_function);
buttonsA.buton7a.addEventListener(MouseEvent.MOUSE_DOWN , buton7a_function);
buttonsA.buton8a.addEventListener(MouseEvent.MOUSE_DOWN , buton8a_function);
buttonsA.buton9a.addEventListener(MouseEvent.MOUSE_DOWN , buton9a_function);
buttonsA.buton10a.addEventListener(MouseEvent.MOUSE_DOWN , buton10a_function);
and i want to put it in several places(in different conditions) can i put them in a function a call a function instead a copying a large amout of text (I thought about 'include' from a different file but i want to keep all the information in one file).
The second question is about arrays : In my situation i have an array and i .push() a different numbers in it.But it could be "1,51,11,2,13' or "1,2,3,4,5" so every time place of numbers (and numbers themselves) are different. How can i say to AS3 in function to remove(.splice) exactly the number 5 or 6 (in spite of their place in the array).
The third question is again about the "code" that is upper in the question. Can i maybe with the loop for to make all these 10 addEventListen with a fewer code (i think it should be something like that:)
for(var i:int = 1; i <= 100; i++){
//buttonsA.buton'i'a.addEventListener(MouseEvent.MOUSE_DOWN , buton'i'a_function);
}
Long story short maybe i didn't have to put so much question and maybe my thoughts are not correct, but i think that my questions are easy but i can't solve them. Any decisions and replies are welcomed :) Thanks.
First Question:
Not sure I understand your first question. I'll take a stab at it and say you're wanting the functionality of the button mouse down to be enabled during different contexts of your application state, but you don't want to repeat all the event listeners all the time?
if so, you should make a subclass for all your button to inherit from. It could look something like this:
public class ButtonSubClass extends Sprite { //or simple button, or whatever
public function ButtonSubClass():void {
this.addEventListener(MouseEvent.MOUSE_DOWN,downHandler,false,0,true);
}
private function downHandler(e:MouseEvent):void {
//do something common to all your buttons here
}
}
Then, have all your buttons inherit from this class.
Second Question:
function removeFromArray(elementVal:*):void {
var index:int = array.indexOf(elementVal); //get the index of the first element whose value is the passed parameter;
if(index >= 0){
array.splice(index,1); //remove that element/index from the array.
}
}
Third Question:
If ButtonA is a sprite whose only children are all the buttons you want the listener for, then you can do this:
var i:int = buttonA.numChildren;
while(i--){
buttonsA.getChildAt(i).addEventListener(MouseEvent.MOUSE_DOWN , button_function);
}
function button_function(e:Event):void {
switch(e.currentTarget){
case button1a:
//do something with button 1a
break;
case button2a
//do something with button 2a
break;
}
}
OR, more sloppily and less efficient and not recommended, this:
for(var i:int=1;i<=10;i++){
this["buton" + i.toString() + "a"].addEventListener(MouseEvent.MOUSE_DOWN, this["buton" + i.toString() + "a_function"]);
}
I'm using the following array to add children to the stage:
for(var i=0;i<6;i++) {
var aCherry=new cCherry()
aCherry.y=10
aCherry.x=10+100*i
stage.addChild(aCherry)
}
Now I want to modify each cherry based on another array. Something like this:
var cherryLetter:Array=[1,0,0,0,0,0]
for(i=0;i<6;++) {
if(cherryLetter[i]) stage.getChildByName("aCherry")[i].y+=90
}
Clearly stage.getChildByName("aCherry")[i] isn't correct, but coming from JavaScript this makes the most sense to me and should accurately portray what I'm trying to achieve for you guys reading this. So, how would I actually do this? This being getting an array of children added to the stage under a certain name or class (so an array of cCherry would work too, if necessary), then using them in a way similar to the above loop.
Here is my recommendation for how the code might look, based on the desire to use getChildByName() to find the instances of your cCherry class. Please note that I've changed the class name to Cherry in the example (which I recommend, since capitalizing class names is AS3 convention). Also, it's good practice to end statements with semi-colons. While it's usually optional, there are cases where omitting the semi-colon can produce very difficult to track down runtime bugs, so I recommend getting int he habit of using them. I also recommend including type in all your variable declarations, as shown with var aCherry:Cherry, for example.
var i:int;
for(i=0; i<6; ++i)
{
var aCherry:Cherry=new Cherry(); // Note, it's my recommendation that you rename cCherry class to Cherry (convention)
aCherry.y=10;
aCherry.x=10+100*i;
aCherry.name = "aCherry" + String(i); // String() cast for clarity only, not necessary
stage.addChild(aCherry);
}
and
var cherryLetter:Array=[1,0,0,0,0,0];
for(i=0; i<6; ++i)
{
var cherry:Cherry = stage.getChildByName("aCherry" + String(i)) as Cherry;
if(cherry && cherryLetter[i]) cherry.y += 90;
}