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How to calculate an angle from three points? [closed]
... is the vertex of then using the Law of Cosines should work:
arccos((P122
+ P132 - P232) / (2 *
P12 * P13))
where P12 is the length of the segment from P1 to P2, calculated by
sqrt((P1x -
P2x)2 +
(P1y -
P2y)2)
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map function for objects (instead of arrays)
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Python assigning multiple variables to same value? list behavior
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274
If you're coming to Python from a language in the C/Java/etc. family, it may help you to stop ...
Why does changing 0.1f to 0 slow down performance by 10x?
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1627
Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
De...
How to map and remove nil values in Ruby
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27
Ruby 2.7+
There is now!
Ruby 2.7 is introducing filter_map for this exact purpose. It's idiom...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
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How can I do an asc and desc sort using underscore.js?
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You can use .sortBy, it will always return an ascending list:
_.sortBy([2, 3, 1], function(num) {
return num;
}); // [1, 2, 3]
But you can use the .reverse method to get it descending:
var array = _.sortBy([2, 3, 1], function(num) {
return num;
});
console.log(array); // [1, 2, 3]
con...
How many characters can UTF-8 encode?
If UTF-8 is 8 bits, does it not mean that there can be only maximum of 256 different characters?
10 Answers
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How to merge dictionaries of dictionaries?
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29 Answers
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How do I remove a property from a JavaScript object?
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