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Difference between a theta join, equijoin and natural join
...h no name. I know it is not a set because, among other reasons, the column order is significant. It's not even a SQL table or SQL table expression. I call it a resultset.
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
...have distinctly un-uniform output.
Inspired by this article about how bad php's rand() function is, I made some random matrix images using QuickRandom and System.Random. This run shows how sometimes the seed can have a bad effect (in this case favouring lower numbers) where as System.Random is pret...
How to set the current working directory? [duplicate]
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Citing the author of a blockquote using Markdown syntax
...edia. Retrieved 23:45, November 20, 2016](https://en.wikipedia.org/w/index.php?title=Test-driven_development&oldid=750634597)
Produces the following:
Test-driven development (TDD) is a software development process that relies on the repetition of a very short development cycle: requirement...
Python Pandas: Get index of rows which column matches certain value
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Ways to implement data versioning in MongoDB
..., content: "bar" }
]
}
data contains all versions. The data array is ordered, new versions will only get $pushed to the end of the array. data.vid is the version id, which is an incrementing number.
Get the most recent version:
find(
{ "_id":ObjectId("...") },
{ "data":{ $slice:-1 } ...
Is it possible to serialize and deserialize a class in C++?
...s to me that boost::serialization requires the caller to keep track of the order in which objects are written and read. Is that correct? So if there is a change in the order in which two fields are written between versions of a program then we have an incompatibility. Is this right?
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What does “#define _GNU_SOURCE” imply?
... Of course, everyone knows the real reason to define _GNU_SOURCE is in order to get strfry and memfrob.
– user4815162342
Mar 9 '13 at 20:40
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Class method differences in Python: bound, unbound and static
...calls the __get__() method of the CPO to access the value it contains.
In order to determine if a CPO is a descriptor, python interpretor checks if it implements the descriptor protocol. To implement descriptor protocol is to implement 3 methods
def __get__(self, instance, owner)
def __set__(self,...
What is the instanceof operator in JavaScript?
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In order to get the prototype link, use Object.getPrototypeOf(o), this will be the same as the __proto__you describe, but conforms to ECMAScript.
– froginvasion
Jul 30 '14 at 9:33
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