Aug 7, 2015 · const insertIntoArray = (arr, value) => { return arr.reduce((result, element, index, array) => { result.push(element); if (index < array.length - 1) { result.push(value); } return …

Multi-line comments start with /* and end with */. Any text between /* and */ will be ignored by JavaScript. This example uses a multi-line comment (a comment block) to explain the code: …

Nov 15, 2020 · What are multi-line comments? Multi-line comments are written between a star-forward slash and a star-forward slash as in below: /* Get the element with its id and set its …

Feb 20, 2017 · Short solution using Array.prototype.join(), Array.prototype.map() and String.prototype.match() functions: var arr = [1,2,3,4,5], newArr = …

There is a huge advantage to commas at the beginning of array and object lines in JavaScript. Namely, when commenting out lines from the array, it makes it much easier. Observe the …

Multi-line comments in JavaScript code can be added by writing the comment between a forward-slash followed by asterisk /* and asterisk followed by a forward-slash */. Below are some …

Dec 28, 2024 · JavaScript supports two types of comments: Single-line comments: When writing short inline comments, use //. Multi-line comments: For more detailed explanations or to …

Adding Array Elements. The easiest way to add a new element to an array is using the push() method:

Feb 4, 2023 · Learn how to use JavaScript comments to explain, document, and test your code. See examples of single-line and multi-line comments.

Feb 22, 2023 · This concise and straight-to-the-point article walks you through different ways to make comments in JavaScript. Line Comment A line comment starts with two forward slashes …