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Checkpoint Coding Foundation

Solve the katas with the following requirements:

  • Clone this repository (on your computer)
  • Delete the existing remote after cloning the repository to your computer
  • Create a new branch called katas-solution
  • Solve the katas on the katas-solution branch
  • Create a new repository on GitHub called checkpoint-coding-foundation
    • Add this repository as the new origin remote to your local repository
  • Push the commits to your GitHub repository
  • Create a new pull request when your are done that will merge your katas-solution branch into the main branch
  • Do not merge the branch yourself
  • Assign the codingbootcampseu GitHub user read permission to your repo
  • Assign the codingbootcampseu user as reviewer to your pull request

All three katas have test files that will be automatically executed when loading the index.html in the browser (please use VS Code Live Server for that).

Kata: Filter API Data

Implement the filterApiData function in filter-api-data.js with the following requirements in mind.

  • The first parameter apiData will be an array that includes objects
  • The objects can have different keys
  • The second parameter mandatoryKeys is a array that includes all keys that an object (from the apiData array) should have to pass the filter test
  • Return an array with only the objects that include all keys from the mandatoryKeys array

Filter Api Data Examples

const data = [{ id: 1, price: 100 }, { price: 50 }];

const filteredData = filterApiData(data, ["id"]);

console.log(filteredData); // [{id: 1, price: 0}]
const data = [
  { id: 1, price: 100 },
  { id: 2, title: "" },
  { id: 3, price: 50 },
];

const filteredData = filterApiData(data, ["id", "price"]);

console.log(filteredData); // [{ id: 1, price: 100 }, { id:3, price: 50}]

Kata: Sum App

Implement the SumApp class in sum-app.js with the following requirements in mind.

  • The sumApp class should have a property numbers which is an array
  • The sumApp class should have a method addNumber(n) which will add the given number to the numbers array
  • The sumApp class should have a method getSum() which return the sum of all numbers added to the numbers array
    • The getSum() method should return 0 if no numbers have been added to the numbers array
  • The sumApp class should have a method reset() which should delete all numbers previously added to the numbers array

Sum App Example

const sumApp = new SumApp();

sumApp.addNumber(1);
sumApp.addNumber(2);

console.log(sumApp.numbers.length); // 2

console.log(sumApp.getSum()); // 3

sumApp.reset();

console.log(sumApp.numbers.length); // 0
console.log(sumApp.getSum()); // 0

Zip Strings

Implement a zipStrings function in zip-strings.js with the following requirements in mind.

  • The zipStrings function receives two string parameters
  • The zipStrings function should return one string where the characters of both parameters are merged using the zip procedure (Reißverschlussverfahren)
  • Merge the strings as shown in the Zip Strings Example code

Zip Strings Example

console.log(zipStrings("abc", "123")); // "a1b2c3"

console.log(zipStrings("abc", "1")); // "a1bc"

console.log(zipStrings("a", "123")); // "a123"

console.log(zipStrings("", "123")); // "123"

console.log(zipStrings("abc", "")); // "abc"