These features enable you to write more flexible and robust code by allowing for the possibility of "undefined" or "null" values, and by providing default values when no value is passed in.
You can use either .includes(), .indexOf(), .search(), .match(), regular expressions, or 3rd-party libraries to check if string contains substring.
In JavaScript, there are two types of variable declarations: "var" and "let". Both keywords are used to declare variables, but they have some key differences in their behavior and scope.
The body is not directly accessible as a string or an object, but rather as a stream of data that can only be read once using methods liks json(), text(), blob(), arrayBuffer(), formData().
There are several ways to remove elements from an array, each with its own advantages and disadvantages. It's generally recommended to use the splice() or filter() method.
By parsing and formatting dates in JavaScript, you can ensure that your apps handle dates consistently and accurately, regardless of where the date comes from or how it is displayed.
If you don’t care about the order, you can use a Set or Dictionary to remove any duplicates, and then convert it back to an array.
A vector database is a type of database that stores data as high-dimensional vectors, which are mathematical representations of features or attributes.
Swift key paths are a way of storing uninvoked references to properties, which is a fancy way of saying they refer to a property itself rather than to that property’s value.
By using `keyof`, you can define types that depend on the properties of an object without actually knowing the specific property names in advance.