How to Replicate Array Elements Multiple Times in JavaScript without the Multiplication Operator?

Replicating Array Elements Multiple Times in JavaScript: Alternative Approaches

In Python, the multiplication operator can be used to create arrays where each element is repeated multiple times. However, JavaScript requires a more explicit approach to achieve the same result.

Function-Based Implementation

One possible solution is to use a function to repeat elements:

var repeatelem = function(elem, n){
    // returns an array with element elem repeated n times.
    var arr = [];

    for (var i = 0; i <= n; i++) {
        arr = arr.concat(elem);
    };

    return arr;
};

ES6 fill() Method

However, in ES6, there is a simpler and more concise method available: Array.fill(). This method takes two parameters: the value to repeat and the number of times it should be repeated.

console.log(
  Array(5).fill(2)
)
//=> [2, 2, 2, 2, 2]

This approach is not only shorter but also more efficient, as it initializes the array with the correct size upfront and then fills it in a single operation.

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