In JavaScript, There are many ways to Auto Fill Array with Default Values. In this tutorial, we will cover simple loop, Array.from() & Array.fill() method.
Methods to Auto Fill Array
- Using Simple Loop
- Using Array.from() method
- Using Array.fill() method
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Method 1: Using Simple Loop
const length = 5;
const filledArray = [];
for(let i = 0; i < length; i++) {
filledArray.push('CodeyMaze');
}
console.log(filledArray);The Output of the above code will be
["CodeyMaze", "CodeyMaze", "CodeyMaze", "CodeyMaze", "CodeyMaze"]Method 2: Using Array.from() method
const length = 5;
const filledArray = Array.from({length}, (_, index) => 'CodeyMaze');
console.log(filledArray);The Output of the above code will be
["CodeyMaze", "CodeyMaze", "CodeyMaze", "CodeyMaze", "CodeyMaze"]Method 3: Using Array.fill() method
const length = 5;
const fillValue = 'JavaScript';
const filledArray = new Array(length).fill(fillValue);
console.log(filledArray);The Output of the above code will be
["JavaScript", "JavaScript", "JavaScript", "JavaScript", "JavaScript"]
