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C++: Rounding up to the nearest multiple of a number
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Bulk insert with SQLAlchemy ORM
...e a huge difference in performance on the server side resulting in about 10x more inserts/s. Apparently is bulk-loading using \copy (or COPY on the server) using a packing in communicating from client-to-server a LOT better than using SQL via SQLAlchemy. More info: Large bulk insert performance diff...
How to split a sequence into two pieces by predicate?
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By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List[Int], List[Int]) = (List(2, 4),List(1, 3))
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What's the easiest way to escape HTML in Python?
...es a different encoding, like Craig says, just use:
data.encode('ascii', 'xmlcharrefreplace')
Don't forget to decode data to unicode first, using whatever encoding it was encoded.
However in my experience that kind of encoding is useless if you just work with unicode all the time from start. Jus...
What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...he shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff);
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What does = +_ mean in JavaScript
...r.
_ is only a variable name (not an operator), it could be a, foo etc.
Example:
+"1"
cast "1" to pure number 1.
var _ = "1";
var r = +_;
r is now 1, not "1".
Moreover, according to the MDN page on Arithmetic Operators:
The unary plus operator precedes its operand and evaluates to its
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Is there any JSON Web Token (JWT) example in C#?
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Thanks everyone. I found a base implementation of a Json Web Token and expanded on it with the Google flavor. I still haven't gotten it completely worked out but it's 97% there. This project lost it's steam, so hopefully this will help someone else get a good head-start:
Note:
Changes I made to ...
How do I verify a method was called exactly once with Moq?
How do I verify a method was called exactly once with Moq? The Verify() vs. Verifable() thing is really confusing.
3 A...
Moq: Invalid setup on a non-overridable member: x => x.GetByTitle(“asdf”)
Not sure how I can fix this, trying to do a unit test on the method "GetByTitle"
1 Answer
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Moving decimal places over in a double
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If you use double or float, you should use rounding or expect to see some rounding errors. If you can't do this, use BigDecimal.
The problem you have is that 0.1 is not an exact representation, and by performing the calculation twice, you are compounding that error.
However, 100...