Aouichaoui Youssef youssef3wi
youssef3wi
/ Factorize.java
Last active
February 21, 2026 19:04
Write a program to "factorize" the extremities of two ASCII strings `str1` and `str2`.
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| /** | |
| * Write a program to "factorize" the extremities of two ASCII strings {@code str1} and {@code str2}. | |
| * <p> | |
| * Your must return a single string, initially made from the concatenation of two given strings. | |
| * The longest substrings that is common between the end of the first string and the beginning | |
| * of the second one must be factorized (written only once). | |
| * <p> | |
| * You must decide the concatenation order {@code str1 + str2} or {@code str2 + str1} so that | |
| * you get the best factorization. | |
| * <p> |
youssef3wi
/ PgNotify.java
Last active
September 18, 2025 18:49
An example that demystifies pg_notify using PostgreSQL's native connection.
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| import org.postgresql.PGNotification; | |
| import org.postgresql.ds.PGSimpleDataSource; | |
| import org.postgresql.jdbc.PgConnection; | |
| import java.sql.SQLException; | |
| import java.util.concurrent.ScheduledExecutorService; | |
| import java.util.concurrent.ScheduledFuture; | |
| import java.util.concurrent.TimeUnit; | |
| import static java.lang.Thread.ofVirtual; |
youssef3wi
/ MergePersonData.java
Created
August 28, 2025 19:48
You collected data about persons from multiple sources. You would like to consolidate them.
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| import java.util.ArrayList; | |
| import java.util.Arrays; | |
| import java.util.List; | |
| import java.util.Map; | |
| import java.util.Set; | |
| import java.util.TreeMap; | |
| import java.util.TreeSet; | |
| /** | |
| * You collected data about persons from multiple sources. You would like to consolidate them. |
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| import java.util.ArrayList; | |
| import java.util.Arrays; | |
| import java.util.List; | |
| /** | |
| * In the echanted land of Evenaria, | |
| * an elf named Codelia was searching for the mystical Even Stones, which maintained balance and harmony. | |
| * One day, she discovered an ancient scroll with a list of numbers representing their locations. | |
| * However, the scroll was damaged and the numbers looked scrambled. | |
| * <p> |
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| import java.util.ArrayList; | |
| import java.util.Arrays; | |
| import java.util.List; | |
| /** | |
| * Your company builds radioactivity sensors. | |
| * You are responsible for their verification process. | |
| * You know that when a sensor is failing, the value it outputs have big variations on short time periods. | |
| * <p> | |
| * The input parameter {@code values}, a list of decimal numbers, |
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| import java.util.ArrayDeque; | |
| import java.util.ArrayList; | |
| import java.util.Deque; | |
| import java.util.HashSet; | |
| import java.util.List; | |
| import java.util.Objects; | |
| import java.util.Set; | |
| import static java.util.Arrays.asList; |
youssef3wi
/ Translate.java
Created
October 12, 2024 13:24
Le javanais, aussi appelé langue de feu, est un procédé de codage argotique qui fut utilisé à la fin du 19ème siècle par certains malfaiteurs pour crypter leur conversations.
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| /** | |
| * <h2>Objectif</h2> | |
| * <p> | |
| * Le javanais, aussi appelé langue de feu, est un procédé de codage argotique qui fut utilisé | |
| * à la fin du 19ème siècle par certains malfaiteurs pour crypter leur conversations. Écrivez un programme | |
| * retournant la traduction en javanais d'une phrase. | |
| * <p> | |
| * <h3>Fonctionnement</h3> | |
| * <p> | |
| * <ul> |
youssef3wi
/ EvenPosition.java
Created
October 12, 2024 11:13
Renvoyer true si value est contenu dans la liste numbers à un index pair (les index sont comptés à partir de 0).
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| import java.util.List; | |
| import java.util.stream.IntStream; | |
| import static java.util.Arrays.asList; | |
| /** | |
| * Écrivez le corps de la méthode {@link #isOnEvenPosition(List, int)}. | |
| * <p> | |
| * La méthode doit renvoyer le booléen {@code true} si {@code value} est contenu dans la liste | |
| * {@code numbers} à un index pair (les index sont comptés à partir de 0). {@code value} peut |
youssef3wi
/ SmallestInterval.java
Created
October 12, 2024 10:58
Implémentez la méthode smallestInterval(numbers) qui retourne le plus petit intervalle positif entre deux éléments du tableau numbers.
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| import java.security.SecureRandom; | |
| import java.time.Duration; | |
| import java.time.Instant; | |
| import java.util.ArrayList; | |
| import java.util.List; | |
| import java.util.Random; | |
| import static java.lang.System.nanoTime; | |
| import static java.util.Arrays.asList; |
youssef3wi
/ StudentChecker.java
Last active
October 12, 2024 10:58
You are tasked with validating student records from an array RecArray, where each element is in the format <name>:<roll_no>:<marks>.
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| import java.util.ArrayList; | |
| import java.util.HashSet; | |
| import java.util.List; | |
| import java.util.Set; | |
| import java.util.regex.Matcher; | |
| import java.util.regex.Pattern; | |
| /** | |
| * <b>Unique Array</b> | |
| * <p> |
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