Learn about the new Map structure, which replaces the need to use objects for any collection of key/value pair elements.
With ES6, Map is introduced to be used…as a key value pair collection to replace objects…and objects are still there for the methods and properties.…One of the main reasons to use Map…is that it doesn't have a pesky prototype like objects do.…If you've ever interacted with an object…that was being used as a map,…you know that properties on the prototype…can often interfere when trying to read properties as a map.…The function hasOwnProperty is often used to determine…whether a property is a part of the actual object…
- Using arrow functions
- Using default parameters
- Reviewing the class structure in ES6
- Assigning variables with let and const
- Array destructuring and object destructuring
- Replacing callbacks with promises
- Keeping values unique with Set
- Dropping the prototype with Map
- Working with generators
- Using yield with arguments
Skill Level Intermediate
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3. Promises and Collections
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Next steps1m 41s
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