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// 1. Open the browser developper console on the network tab | |
// 2. Start the video | |
// 3. In the dev tab, locate the load of the "master.json" file, copy its full URL | |
// 4. Run: node vimeo-downloader.js "<URL>" | |
// 5. Combine the m4v and m4a files with mkvmerge | |
const fs = require('fs'); | |
const url = require('url'); | |
const https = require('https'); |
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Value objects are an important concept in DDD. This kata is made both to learn value objects and to learn better ways of testing. | |
Write a probability value object. It should contain the following methods: | |
Probability CombinedWith(Probability) | |
Probability InverseOf() | |
Probability Either(Probability) | |
if you forget your probability math: | |
Either:P(A) + P(B) - P(A)P(B) | |
CombinedWith: P(A)P(B) |
Linux basic information unified from personal notes and bookmarks
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OK so now you have implemented the kata. Your tests should look something like this: | |
We can say that the tests define the object "in a calculus of itself". They are not state based tests, they define how the behaviours of the object interact with each other. | |
To see the real value of this let's introduce some change ... I hear real system's do this occasionally. Because this is a high performance system decimal math is too slow. You now need to use floats instead. | |
Need help on floating point math? Check out: http://www-users.math.umd.edu/~jkolesar/mait613/floating_point_math.pdf | |
You will need to use a non-exact equality... How will this change your code? |