What Javascript coding challenges are perfect for beginners?

6. Sum of Array Elements

• Challenge: Write a function to find the sum of all elements in an array.
• Concepts Practiced: Array manipulation, loops, reduce.
• Example:

  function sumArray(arr) {
    return arr.reduce((sum, num) => sum + num, 0);
  }

7. Remove Duplicates from an Array

• Challenge: Write a function that removes duplicate values from an array.
• Concepts Practiced: Set data structure, array manipulation.
• Example:

  function removeDuplicates(arr) {
    return [...new Set(arr)];
  }

8. Count Occurrences of Characters in a String

• Challenge: Create a function that counts how often each character appears in a string.
• Concepts Practiced: Object manipulation, loops, string traversal.
• Example:

  function charCount(str) {
    const counts = {};
    for (let char of str) {
      counts[char] = counts[char] ? counts[char] + 1 : 1;
    }
    return counts;
  }

9. Check for Prime Numbers

• Challenge: Write a function to determine if a number is prime (only divisible by 1 and itself).
• Concepts Practiced: Loops, conditional logic, basic math.
• Example:

  function isPrime(num) {
    if (num <= 1) return false;
    for (let i = 2; i <= Math.sqrt(num); i++) {
      if (num % i === 0) return false;
    }
    return true;
  }

10. Merge Two Sorted Arrays

• Challenge: Write a function to merge two sorted arrays into a single sorted array.
• Concepts Practiced: Array manipulation, loops.
• Example:

  function mergeSortedArrays(arr1, arr2) {
    return [...arr1, ...arr2].sort((a, b) => a - b);
  }

These challenges focus on essential JavaScript concepts that are crucial for beginners. For structured learning and additional practice, DesignGurus.io offers an excellent course called Grokking JavaScript Fundamentals that covers core JavaScript concepts, coding patterns, and problem-solving techniques tailored for beginner and intermediate levels. This course can further build your foundational knowledge and help you approach more advanced challenges confidently.