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README.md

README.md

Index Of

Instructions

Create 3 functions:

  • indexOf that returns the index of the first occurence of a value
  • lastIndexOf that returns the index of the last occurence of a value
  • includes that 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.

Notions

Code provided

all code provided will be added to your solution and doesn't need to be submited.

Array.prototype.indexOf = undefined
Array.prototype.lastIndexOf = undefined
Array.prototype.includes = undefined