codeWars_Numbers_WCS_Bootcamp

Wild Code School CodeWars package about numbers 💀

Last update: 20190121

Recap

Item 41 Basic Mathematical Operations ☁️

Your task is to create a function that does four basic mathematical operations.
The function should take three arguments - operation(string/char), value1(number), value2(number).
The function should return result of numbers after applying the chosen operation.

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Item 42 Count of positives / sum of negatives 🐙

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Look at the filter solution here
Compare and contrast Map(), Filter() and Reduce() 😉

Item 43 Invert values 🐨

Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives.

invert([1,2,3,4,5]) == [-1,-2,-3,-4,-5]
invert([1,-2,3,-4,5]) == [-1,2,-3,4,-5]
invert([]) == []

You can assume that all values are integers.

Hints: deal with the empty array first, then think about the 0 that should not become -0

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Hint: the map() with 2 ternary operators inside 💃

Item 44 Breaking Chocolate Problem 🍫

Your task is to split the chocolate bar of given dimension n x m into small squares. Each square is of size 1x1 and unbreakable. Implement a function that will return minimum number of breaks needed.
For example if you are given a chocolate bar of size 2 x 1 you can split it to single squares in just one break, but for size 3 x 1 you must do two breaks.
If input data is invalid you should return 0 (as in no breaks are needed if we do not have any chocolate to split). Input will always be a non-negative integer.

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Hint:

Item 45 (soon)

Item 46 (soon)

Item 47 (soon)

Item 48 (soon)

Item 49 (soon)

Item 410 (soon)

OK, let's move it 😉

codingk8/codeWars_Numbers_WCS_Bootcamp

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