Quick Reference
The Array fill() method fills specified elements in an array with a value, overwriting the original array. If the start and end positions are NOT specified, ALL elements will be filled.
<!-- html element to place output -->
<p id="my_cars"></p>// array
let cars = ['Lamborghini', 'Ferrari', 'Maserati', 'Alfa Romeo'];
// fills item 1 and 2 with Lotus
document.getElementById('my_cars').innerHTML = cars.fill('Lotus',1,3);The way this works (see Syntax section below):
- The fill() method looks within the array and starting with item 1 and ending before item 3, replaces the values with Lotus
Note
Arrays count starting from zero NOT one. So item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on.
Output
Lamborghini,Lotus,Lotus,Alfa Romeo,Astin Martin,PorscheSyntax
array.fill(value, start, end)Parameters
| Parameter | Description |
|---|---|
| value | The value to fill in (required) |
| start | The start position (default is 0) |
| end | The stop position (default is the array length) |
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.