Object Oriented Programming module of JavaScript Algorithm and Data Structures freeCodeCamp Certification

Function updateRecords keeps updated your musical album collection represented by a JSON object. Each album has a unique id number as its key and several other properties like artist or tracks.

FCC exercise to learn functions. lookUpProfile() function takes a name and a property (_prop_) as arguments and checks if name is an actual contact's firstName and the given property (prop) is a property of that contact.

Basic Data Structures module of JavaScript Algorithm and Data Structures freeCodeCamp Certification

Showing a dictonary object and how to destroy and repair its "hasOwnProperty" method

[Node.js] Retrieves a property only if hasOwnProperty() is true.

Used to determine whether an object has an own property with the specified property key.

Test if an object has a specified property, either own or inherited.

Test if an object has a specified method name.

Test if an object has a specified property.

Test if an object has a specified method name, either own or inherited.

Universal and better typed `hasOwnProperty` for IntelliSense. Supports checking: properties of all types; multiple keys at a time; and type of values.

Returns true if an object has an own, enumerable property. Nested properties can be checked using using dot notation paths ('a.b.c').