this is the missing repo to teach the core concepts about javascript
The idea is to have failing tests and the azubis have to fix them.
npm install # once
npm run all # to run the whole test suite
npm run single -- <folder> # to run one specific suite
- Datatypes
- what datatypes do exist in the programming language JavaScript? List them!
- what does coersion mean? Give me an example!
Now solve the test suite by fixing all the tests:
npm run single -- datatypes
- Control structures
- what control structures do you know?
- given a loop that prints number from 1 to 5. Implement this with a for loop and a while loop.
- What is a fall-through in context of a switch statement?
Now solve the test suite by fixing all the tests:
npm run single -- controlstructures
- Arrays
- what operations would you do with a list of elements? List them!
- why do you think is this true
typeof [] == "object"? What makes an object an object in classical programming?
Now solve the test suite by fixing all the tests:
npm run single -- arrays
- Objects
- Objects are container elements are also known as map, hashmap or key-value pair. Not much to it :-)
Now solve the test suite by fixing all the tests:
npm run single -- objects
- Functions
- write a function in three different programming languages that returns the sum of two numbers, which have been given to the function as an argument.
- what is similar in all three implementations? what is different?
- explain variable shadowing. Give me an example!
Now solve the test suite by fixing all the tests:
npm run single -- functions
- Scope
- What is the difference between declaration and definition? How does this relate to the concept of 'hoisting'. Explain!
- Watch https://www.youtube.com/watch?v=ZoFlcv2ByBo .
- What is hoisting again? What scopes does javascript use? List them!
Now solve the test suite by fixing all the tests:
npm run single -- scope
- Prototypes
There are many definitions of 'prototype': 1) an original model on which something is patterned, 2) a standard or typical example, 3) a first full-scale and usually functional form of a new type or design of a construction. For JavaScript the first one applies!
- What types of languages do you know. Try to find 3 groups.
- What are the main concepts of an object-oriented programming language?
- every property of an js-object has to be stored in memory. Open your favorite browser and try to analyse the memory footprint of a website.
Now solve the test suite by fixing all the tests:
npm run single -- prototypes