Technically, a permutation means a re-ordering of some elements, so for example, [3,1,2] is a permutation of [1,2,3]. What you’re asking for is equivalent to iterating over a Cartesian product, hence the Python function being named product. As you correctly note, recursion is the way to go here. This is because generating all sequences for … Read more
class B { int m() { return new A().m(); } } or class B { private A a = new A(); int m() { return a.m(); } } or class B { private A a; public B(A a) { this.a = a; } int m() { return a.m(); } } solved Inheritance vs. Delegation [duplicate]
If your application uses the internet, it is possible, that the phone has a worse connection than your comp. Slower connection – you have to wait… Read responsive App and App performance – VERY useful. you will know the name of your problem – bad responsiveness (not performance) – for better further searches solved How … Read more
dec1 = decimal number representation of num1(binary) k = binary factor dec1 = dec1 + (num1%10) * k; Here he is building the decimal number from binary number. (num1%10) gives the last digit of the number. Ex: num1 = 110 First iteration: dec1 = 0 +(110 %10) *1 dec1 = 0 k = 1*2 Second … Read more
A one possible solution is to define a custom predicate like this: Predicate<Item> myPredicate = item -> randomVar == 42; Then you can use the predicate in your stream: items .stream() .filter(myPredicate) .forEach(System.out::println); solved Filtering on unrelated variable in java streams
try this SharedPreferences sp=getSharedPreferences(“Button”, Context.MODE_PRIVATE); SharedPreferences.Editor Ed=sp.edit(); // get status of button to set backround from SharedPreferences in oncrate() methosd if(sp.getBoolean(“button1”,false)){ b1.setBackgroundColor(Color.WHITE); }else { b1.setBackgroundColor(Color.GREEN); } if(sp.getBoolean(“button2”,false)){ b2.setBackgroundColor(Color.WHITE); }else { b2.setBackgroundColor(Color.GREEN); } // set button background status in SharedPreferences b1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { b1.setBackgroundColor(Color.GREEN); b2.setBackgroundColor(Color.WHITE); Ed.putBoolean(“button1”, true); Ed.commit(); } } … Read more
Here if you have defined i<=user.length that means i<=5 since you array length is 5 but when you are indexing the array to print it can print between 0 to 4 indexes when it reaches index 5 there is no value in the array for index 5 hence it throws index out of bound error. … Read more
Ok, so the first parameter of the function is a List<E> named Arraylist (You shouldn’t capitalize variables in Java, name it as such arrayList). The second parameter is a Class<? extends E> named clazz. Check manub’s explaination of Class<?>: Class is a parameterizable class, hence you can use the syntax Class<T> where T is a … Read more
This is what XML is for. Create your layout in xml and import it via java. You will want to create your own “bar layout” for the bars in the center, though you could I suppose, fill 3 separate LinearLayouts to achieve the same effect, making a separate layout and putting in it here will … Read more
You could use the substring method: String result = x.substring(8); solved Extract/Trim part of string, Java [duplicate]
To solve this problem, move the declaration of your final int[] ndomande = {14}; array inside the onDataChange() method, otherwise it will be always null. public void onDataChange(DataSnapshot dataSnapshot) { //Toast.makeText(PlayTest.this, “FIN QUI “,Toast.LENGTH_SHORT).show(); final int[] ndomande = {14}; for (DataSnapshot messageSnapshot : dataSnapshot.getChildren()) { //Toast.makeText(PlayTest.this, “QUI “,Toast.LENGTH_SHORT).show(); long numero_domande = (long) messageSnapshot.getValue(); ndomande[0] = … Read more
The Button and View classes need to be imported; e.g. import android.widget.Button; import android.view.View; Your class is in the default package, so all classes that it uses (apart from those in the java.lang package) need to be imported. The reference to button_id is probably a mistake. Button mButton = (Button) findViewById(R.id.button); final Button button = … Read more
You are getting IndexOutOfBoundsException on restrictedAreaArrayList, You are adding imageInfos to restrictedAreaArrayList with restrictedAreaArrayList.add(i,imageInfos); ith index may not exist in restrictedAreaArrayList you can just add it restrictedAreaArrayList.add(imageInfos) Or if you want to preserve the order then make restrictedAreaArrayList’s size equal to imageInfosArrayList you can do that by creating it with restrictedAreaArrayList = new ArrayList<ImageInfos>(imageInfosArrayList.size()); Or … Read more
If getTranscript is void: for (String s : slist) { getTranscript(s); } If getTranscript returns a string and you would like to save it: ArrayList<String> transcripts = new ArrayList<String>(); for (String s : slist) { transcripts.add(getTranscript(s)); } 1 solved Need help to convert data in an ArrayList to Strings and Pass each of them as … Read more
I think what you are confused about is the modulo operation. At least the text does not fit to what it is doing. To calculate what was the difference between the two numbers you would just do difference = numberGenerated – numberGuessed; When you don’t want to have negative values you could use difference = … Read more