slice()

• Returns a shallow copy of a portion of an array.

• Example:

  let fruits = ['Apple', 'Banana', 'Mango', 'Orange'];
  let citrus = fruits.slice(2, 4);
  console.log(citrus); // Output: ['Mango', 'Orange']
  
  

concat()

• Merges two or more arrays.

• Example:

  let fruits = ['Apple', 'Banana'];
  let moreFruits = ['Mango', 'Orange'];
  let allFruits = fruits.concat(moreFruits);
  console.log(allFruits); // Output: ['Apple', 'Banana', 'Mango', 'Orange']
  
  

flat()

• Creates a new array with all sub-array elements concatenated into it recursively up to the specified depth.

• Example:

  let nestedArray = [1, [2, [3, [4]], 5]];
  let flatArray = nestedArray.flat(2);
  console.log(flatArray); // Output: [1, 2, 3, [4], 5]
  
  

join()

• Joins all elements of an array into a string.

• Example:

  let fruits = ['Apple', 'Banana', 'Mango'];
  let joined = fruits.join(', ');
  console.log(joined); // Output: 'Apple, Banana, Mango'