34,590
questions
-5
votes
0
answers
43
views
Shuffling a list based on specific requirements [closed]
I am building an online language experiment using JavaScript. As a beginner-level javaScript learner, I am having difficulties shuffling a list based on specific requirements and sampling items from ...
0
votes
1
answer
21
views
How to fetch object data from Modal Input to Homepage with Array Function for making Contact List?
I am new in this field, want to learn coding in React native to develop Mobile App.
I want to develop one Contact List with React Native
In Home page I put one (+) button to toggle / opening of the ...
0
votes
0
answers
41
views
Java KeyEvent and ArrayList Issue
I am writing code for a personal project that takes data from a CSV file, and passes it to an editable JCombobox that then displays names of airports.
Having done that - I want to write the quality of ...
-2
votes
0
answers
36
views
Instantiation of ArrayList works fine in one class but is null in another [duplicate]
I'm at my wits end here. I have created an ArrayList method in one class
public static ArrayList<Area> areas()
{
ArrayList<Area> areas = new ArrayList<Area>(); //...
1
vote
5
answers
173
views
How to sort an ArrayList of Objects by their ArrayList<Integer> values?
Suppose object has ArrayList<Integer> and an ArrayList of those objects needed to be sorted by their ArrayList<Integer> values so that, first index of the Integer ArrayList takes most ...
- 27
-2
votes
6
answers
107
views
How do I check if the next element in ArrayList is empty or exists?
I have a 2D ArrayList for which I want to print out the names with commas if they're in the same row except for the last one. To do this I would need to check if the element before the one I am ...
- 65
0
votes
0
answers
13
views
In Cloverdx, trying to store fields and then use them to validate the data
In Cloverdx, I have data like this Now I want to store the field names and their data types in a list/variable and then check if the values under field name i.e., if value is Auto Complete and data ...
2
votes
1
answer
74
views
Collection API remove method implementation
I have had a look at the Java Collection API. The Collection interface defines the remove method as follows:
public interface Collection<E> {
// other methods
boolean add(E e);
...
1
vote
2
answers
88
views
Alternatives to ArrayList<Double> for primitive types in Java for numerical computation
My question is: What are the best practices to avoid the mentioned overhead? I don't understand why my question was closed with the reason: 'This question needs to be more focused.'
I am currently ...
- 1,485
0
votes
0
answers
30
views
How to sort two inner index ArrayList<ArrayList<Integer>>? [duplicate]
How to sort ArrayLists with two values, so that first value will have higher priority and second lower.
ArrayList<> myArrayList = new ArrayList<>;
for(i = 0; i <4; i++) {
ArrayList&...
- 27
1
vote
2
answers
139
views
What is a fast way to count how many times a given value is present in an ArrayList?
ArrayList<Integer> myArrayList = new ArrayList<>;
for (int i = 0; i < 5; i++) {
myArrayList.add(i);
}
myArrayList.add(2);
myArrayList.add(2);
myArrayList.add(3);
//arryaylist ...
- 27
0
votes
1
answer
27
views
How to handle the Formarray in the Nested array in Angular
enter image description here
I need to render the Dynamic fields in the Angular. But, that one is solved. Then what the issue is when i render the Nested Array or a Group it's not rendering properly.
...
0
votes
1
answer
31
views
How to Pass ArrayList of Custom Objects Between Activities in Kotlin on Android Studio
I'm working on an Android project in Kotlin where I store user information in a custom object. I need to pass an ArrayList<CustomObject> from one activity to another and display the stored ...
- 15
1
vote
2
answers
65
views
How to add an ArrayList in a Superclass using Getters and Setters from a subclass
Here is the super class:
public abstract class ImperialCluster implements Serializable,Clusterable {
private static final long serialVersionUID = 1L;
private String clusterType;
...
-1
votes
1
answer
41
views
How to filter objects from list based on uniqueness of object property?
I have a list of Person objects. Each Person object has an int id property, along with some others. Currently my list of Person objects has multiple objects with the same id. I want to filter the list ...
- 433