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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?

...correct' way is to get all the wheels, ordered by CarId (1 select), and if more details than the CarId are required, make a second query for all cars (2 queries total). Printing things out is now optimal, and no indexes or secondary storage were required (you can iterate over results, no need to dow...
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How to assign a Git SHA1's to a file without Git?

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How to split a string literal across multiple lines in C / Objective-C?

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How to compare strings in Bash

...ant to do something when they don't match, replace = with !=. You can read more about string operations and arithmetic operations in their respective documentation. Why do we use quotes around $x? You want the quotes around $x, because if it is empty, your Bash script encounters a syntax error as ...
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Authentication versus Authorization

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What is the best algorithm for overriding GetHashCode?

... The algorithm described in the book you mention is infact a little more detailed it especailly describes what to do for different data types of the fields. E.g.: for fields of type long use (int)(field ^ f >>> 32) instead of simply calling GetHashcode. Is long.GetHashCodes implement...
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How does JavaScript .prototype work?

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C# switch statement limitations - why?

...not accustomed to having such freedoms, they do not demand them. Another, more valid, reason is that the language complexity would increase: First of all, should the objects be compared with .Equals() or with the == operator? Both are valid in some cases. Should we introduce new syntax to do this?...
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How do I check if a variable exists?

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Making a mocked method return an argument that was passed to it

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