One should "depend upon abstractions, [not] concretions.
The most basic example is the following, imagine the following implementation, while LINQ does not exist:
/**
* Filter out all 0 items
*/
public IEnumerable<int> Filter(IEnumerable<int> array) 
| /** | |
| * Lightweight script to detect whether the browser is running in Private mode. | |
| * @returns {Promise<boolean>} | |
| * | |
| * Live demo: | |
| * @see https://output.jsbin.com/tazuwif | |
| * | |
| * This snippet uses Promises. If you want to run it in old browsers, polyfill it: | |
| * @see https://cdn.jsdelivr.net/npm/es6-promise@4/dist/es6-promise.auto.min.js | |
| * |