Advertisements I was doing some algo in my free time and had a weird issue. I can not understand why this is happening. I have two lists, and I am updating elements precisely the same way in both of them, but in the "lazy" list, when I update an element, all elements are updated. This… Read More The entire ArrayList is updating when I am trying to update one element Java 21

Advertisements I’m receiving a logic error when trying to find all the prime numbers in this array on Codecademy: import java.util.Arrays; import java.util.ArrayList; class PrimeDirective { // Add your methods here: public void findPrime(int[] nums) { ArrayList<Integer> primeNumbers = new ArrayList<Integer>(); for (int i = 0; i < nums.length; i++) { if ((nums[i] % 2… Read More Logic error when finding prime numbers in an array

Advertisements I’m learning JS and I’m facing a problem, I’ve written my code below. var AddStock = document.createElement(‘button’); //Button for adding the ticker to the list var Ticker = document.createElement(‘input’); //Input of the tickers that the user is going to use var TickerChosenContainer = document.createElement(‘div’); //Container for all the tickers that the user is going… Read More How to add a new button to display when the array has more than 2 values?

Advertisements I need help sorting an array list that contains all the names in the names.txt file. I tried Collections.sort() like suggested but the list is still unsorted. What am I doing wrong? private static void Excerise04(String fname) throws FileNotFoundException { Scanner filescanner = new Scanner(new File(fname)); while (filescanner.hasNext()) { String line = filescanner.next(); ArrayList<String>… Read More Need help sorting arraylist alphabetically

Advertisements I have JSON including multiple nested records. I want to add records with comma separated and store it in a CSV file. JSON Body { "projectVitals": { "productName": "Enterprise", "name": "WhiteSource Bolt", "token": "61a48eab05356f149828c0e", "creationDate": "2022-10-17 09:08:46", "lastUpdatedDate": "2023-01-25 06:37:32" }, "libraries": [ { "keyUuid": "a89b-40759d783dc3", "keyId": 145110423, "type": "NUGET_PACKAGE_MODULE", "languages": "Nuget", "references": {… Read More Add nested records of JSON body into one column while exporting to CSV in powershell

Advertisements I am trying to access an object from an array of objects in a simple program. For hours , I have been scratching my head. The moment I try to call the object from the array of objects using its INDEX VALUE, the output is error. Problem: I am trying to take details from… Read More Trying to access an object from array of objects-Cannot invoke "Student.setName(String)" because "s[i]" is null

Advertisements I’m trying to find the max element to the left of each element but i could write code for only the first max. public static void main(String[] args) { int a[]={3,0,0,2,0,4}; Stack<Integer> st=new Stack<Integer>(); ArrayList<Integer> al=new ArrayList<>(); for(int i=0;i<5;i++){ while(st.size()>0 && a[st.peek()]<a[i]){ st.pop(); } if(st.empty()) al.add(a[i]); else al.add(a[st.peek()]); st.push(i); } System.out.println(al); } >Solution :… Read More Find overall max element to the left of each element in an arrray (not the first max)

Advertisements I am trying to iterate over the list elemets and remove non-string items. However the loop is failing and removing strings as well. currency.unique() array([‘CADCAD’, ‘CADCHF’, ‘CADEUR’, ‘CADGBp’, ‘CADUSD’, ‘CADNOK’, nan, ‘CADMXN’], dtype=object) Forex_ticker=list(currency.unique()) for item in Forex_ticker: if type(item)!=’str’: print(item,type(item),Forex_ticker) Forex_ticker.remove(item) else: continue CADCAD <class ‘str’> [‘CADCAD’, ‘CADCHF’, ‘CADEUR’, ‘CADGBp’, ‘CADUSD’, ‘CADNOK’, nan,… Read More For loop to remove non-strings from a list

Advertisements I have an issue I know I can solve just using an array but that makes a later part of the program more challenging. Im reading off of a datafile a bunch of letters spaced out. i want to sort them into columns, the data file shows this: [J] [F] [M] [Z] [F] [G]… Read More Add to all Strings in an arraylist different letters

Advertisements Maybe somebody could help me. I don’t understand what is wrong with my code. I want loop through the ArrayList, get the index value of each element (index number itself) and add these index values to another array. Don’t ask me why =)) Here’s my code: List<Integer> a = new ArrayList<>(); a.add(2); a.add(5); a.add(1);… Read More Trying to get index values of an ArrayList and add them to another ArrayList