Answers.md

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1. .forEach calls a function once per element of an array and .map creates a new array of the results of calling a function per element.
2. Types

• Object
• Boolean
• Strings
• Numbers
• Functions
• Arrays can have any type as part of their data.

3. Closure is the ability of an inner function to grab data from an outter function in it's scope.

const closureFunction = () => { let i = 0; const closedFunction = () => { return i++; }; return closedFunction(); }; ``` 4. * When this is used in a global area, it refers to the window. * When `this` is in a function called by a preceding dot, `this` is the object to the left of the dot. * When used with a constructor function, `this` is the object created by the constructor function. * When using call and apply, `this` refers to the arguments passed for call and apply.