## Index Of ### Instructions Create 3 functions: - `indexOf` which returns the index of the first occurrence of a value and takes as arguments an array to be searched, the value to be matched, and optionally the index from where to start searching from. - `lastIndexOf` which works just like the previous function but returns the index of the last occurrence of a value - `includes` which returns true if the value was found in the array > If a value is not found, the returned index is -1 > functions should have an array element as first argument, > both `indexOf` and `lastIndexOf` take an additional `fromIndex` argument > that allows you to begin searching from a specific index and it will work exactly like in the original methods. ### Notions - [devdocs.io/javascript/global_objects/array/indexof](https://devdocs.io/javascript/global_objects/array/indexof) - [devdocs.io/javascript/global_objects/array/lastindexof](https://devdocs.io/javascript/global_objects/array/lastindexof) - [devdocs.io/javascript/global_objects/array/includes](https://devdocs.io/javascript/global_objects/array/includes) ### Code provided > all code provided will be added to your solution and doesn't need to be submitted. ```js Array.prototype.indexOf = undefined Array.prototype.lastIndexOf = undefined Array.prototype.includes = undefined ```