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Chaining multiple filter() in Django, is this a bug?

I always assumed that chaining multiple filter() calls in Django was always the same as collecting them in a single call. 4...
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How do I avoid capturing self in blocks when implementing an API?

...ied inside the block (we're not doing that) but also they are not automatically retained when the block is retained (unless you are using ARC). If you do this, you must be sure that nothing else is going to try to execute the block after the MyDataProcessor instance is released. (Given the structure...
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Why malloc+memset is slower than calloc?

...en though it is already filled with zeroes. This is an enormous amount of extra work, and explains why calloc() is faster than malloc() and memset(). If end up using the memory anyway, calloc() is still faster than malloc() and memset() but the difference is not quite so ridiculous. This doesn'...
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SQL Server - stop or break execution of a SQL script

... perfect. does not require sysadmin ultra extra user rights – Pac0 Nov 5 '18 at 10:40 ...
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Why don't structs support inheritance?

...Basically, they're supposed to hold simple data and therefore do not have "extra features" such as inheritance. It would probably be technically possible for them to support some limited kind of inheritance (not polymorphism, due to them being on the stack), but I believe it is also a design choice ...
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How to check if a table contains an element in Lua?

...out that you can't actually use the 'element' as a key, because it's not a string for example, then add a checksum or tostring on it for example, and then use that as the key. Why do you want to do this? If your tables are very large, the amount of time to iterate through every element will be sig...
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How do JavaScript closures work?

...clared outside the function, regardless of when and where the function is called. If a function was called by a function, which in turn was called by another function, then a chain of references to outer lexical environments is created. This chain is called the scope chain. In the following code, in...
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Can I store the .git folder outside the files I want tracked?

...e gitdir: /path/to/repo.git Since git 1.7.5 the init command learned an extra option for this. You can initialize a new separate repository with git init --separate-git-dir /path/to/repo.git This will initialize the git repository in the separate directory and add the .git file in the current...
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Should each and every table have a primary key?

... creates a primary key if you didn't specify it explicitly, thus making an extra column you don't have access to. Note that a primary key can be composite. If you have a many-to-many link table, you create the primary key on all fields involved in the link. Thus you ensure that you don't have two ...
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NewLine in object summary

...note that if you have a space after the <br /> tag, you would get an extra space one the next line. So you wanna have the same amount of space on each line, so every row it'll be in a straight line. /// <summary> /// This is line 1<br /> /// This is line 2<br /> /// This is ...