SEW | Working with Objects

User Story 1

As a curious developer I want to learn about objects, so that I can use them in the right way.

Acceptance Criteria

• An object x is defined in a certain way, so that the statement console.log(x.y.z) prints 42 to the console.

User Story 2

As a curious developer I want to learn about objects, so that I can use them in the right way.

Acceptance Criteria

• An object v is defined in a certain way, so that the statement console.log(v.v().v) prints 42 to the console.

User Story 3

As a curious developer I want to learn about objects, so that I can use them in the right way.

Acceptance Criteria

• A new property is added to the object v (from user story 2).
• The value of this new property is printed to the console.

User Story 4

For debugging purposes I can print all keys and all values of an object.

Acceptance Criteria

• A function debugObject(obj) is available.
• The function first prints a list of all keys, followed by a list of all values, followed by a list of key:value pairs.

User Story 5

As a lazy developer I want to compare the structure of two objects easily, so that I can be sure about them.

Acceptance Criteria

• A function equals(obj1, ob2) is available.
• The function returns true, if obj1 and obj2 are equal.
• The objects are equal if
  • they have the same number of members
  • if they both have members with the same name
• The order of the members does not matter

User Story 6

As a curious developer, I want to learn about Destructuring and Spread to use them efficiently in my code.

Use the following object:

const person = {
  name: "Maya",
  age: 27,
  address: {
    city: "Berlin",
    zip: "10115"
  }
};

Acceptance Criteria

• Destructuring is used to store name and city in separate variables.
• A new object personExtended with spread is created that contains all properties of person, plus an additional field email with the value "[email protected]".
• The age field in the new object is overwritten to 28 using spread.

User Story 7

As a professional JavaScript developer, I want to understand a key difference between traditional function expressions and arrow functions.

Acceptance Criteria

• Create an object representing a person with name and age properties.
• The object has two methods:
  • One using a traditional function.
  • One using an arrow function.
• Both methods log this.name to the console.
• The observed behavior is explained in a comment.

Skill(s)

• JavaScript Objects