exhesham

const chunkSize = 3;
const numberOfTasks = 10;
let tasksSleepInput = Array(numberOfTasks).fill(30).map(v => ({delay: v, index: '' }));
// add indices
Object.keys(tasksSleepInput).forEach(k => tasksSleepInput[Number.parseInt(k)].index = k);

exhesham

/* Dynamic programming solution:
1. Let dp[i] where i is between [0..amount+1] represents the minimum amount of coins needed for i.
2. dynamic programming solution gives:
for each coin in coins and foreach amount i: dp[i] = min(dp[i], dp[i - coins[j]] + 1);
*/
int coinChange(vector<int>& coins, int amount) {
    int Max = amount + 1;
    vector<int> dp(amount + 1, Max);
    dp[0] = 0;
    for (int i = 1; i <= amount; i++) {

exhesham

public boolean isCycleUtil(int vertex, boolean[] visited, boolean[] recursiveArr) {
    visited[vertex] = true;
    recursiveArr[vertex] = true;

    //recursive call to all the adjacent vertices
    for (int i = 0; i < adjList[vertex].size(); i++) {
        //if not already visited
        int adjVertex = adjList[vertex].get(i);
        if (!visited[adjVertex] && isCycleUtil(adjVertex, visited, recursiveArr)) {
            return true;

exhesham

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // COMPLETED (9) Within onCreateOptionsMenu, use getMenuInflater().inflate to inflate the menu
    getMenuInflater().inflate(R.menu.main, menu);
    // COMPLETED (10) Return true to display your menu
    return true;
}

exhesham

private final Lock lock = new ReentrantLock(isFair);

// usage:
try{
  lock.lock();
 // Do some stuff 
  
} finally{
  lock.unlock();
}

exhesham

CompletableFuture<String> future1 = CompletableFuture.supplyAsync(() -> "Hello");
CompletableFuture<String> future2  = CompletableFuture.supplyAsync(() -> "Beautiful");
CompletableFuture<String> future3 = CompletableFuture.supplyAsync(() -> "World");
CompletableFuture<Void> combinedFuture = CompletableFuture.allOf(future1, future2, future3);
combinedFuture.get();
assertTrue(future1.isDone());
assertTrue(future2.isDone());
assertTrue(future3.isDone());

// the result of each one can be processed as follows:

exhesham

public class RunnableJob implements Runnable{
        @Override
        public void run() {

        }
    }
public void runJobs(){
    CompletableFuture<Void> f = CompletableFuture.runAsync(new RunnableJob());
    f.thenRun(new RunnableJob());

exhesham

public class FilterLogin implements Filter {
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain){
    // inject cookie
    Cookie c = getCookie(httpServletResponse, "WASReqURL");
    if(c  == null){
      // inject the cookie if it is not there
			c = new Cookie("WASReqURL", "");
			httpServletResponse.addCookie(c);	
		}
    String newUrl = "/my_action_servlet";

exhesham

Uri builtUri = Uri.parse(BASE_URL).buildUpon()
        // add various params
        .appendQueryParameter(PARAM_QUERY, githubSearchQuery)
        .appendQueryParameter(PARAM_SORT, sortBy)
        // build the uri
        .build();

// Convert the Uri to a URL:
URL url = null;
try {

exhesham

public class MainActivity extends AppCompatActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.activity_main); 
       // other code to setup the activity 
    } 
    // other code 
}