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Postgres and Indexes on Foreign Keys and Primary Keys

Does Postgres automatically put indexes on Foreign Keys and Primary Keys? How can I tell? Is there a command that will return all indexes on a table? ...
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How to set the prototype of a JavaScript object that has already been instantiated?

...e I have an object foo in my JavaScript code. foo is a complex object and it is generated somewhere else. How can I change the prototype of the foo object? ...
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What does do?

... October 2015 Update This answer was posted several years ago and now the question really should be should you even consider using the X-UA-Compatible tag on your site? with the changes Microsoft has made to its browsers (more on those below). Depending upon what Microsoft browsers you...
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Extending from two classes

... You can only Extend a single class. And implement Interfaces from many sources. Extending multiple classes is not available. The only solution I can think of is not inheriting either class but instead having an internal variable of each class and doing more o...
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What is a monad?

...t necessarily “good”. They are a pattern which is sometimes beneficial and sometimes not. Do note that the monadic patten can be combined in a different way: [1,2,3].flatMap(a => [a + 1].flatMap(b => b != 3 ? [b] : [])) Here the binding is nested rater than chained, but the result is the ...
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When should one use final for method parameters and local variables?

... references ( for example ) that suggest using final as much as possible and I'm wondering how important that is. This is mainly in the the context of method parameters and local variables, not final methods or classes. For constants, it makes obvious sense. ...
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What is the difference between '@' and '=' in directive scope in AngularJS?

I've read the AngularJS documentation on the topic carefully, and then fiddled around with a directive. Here's the fiddle . ...
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LINQPad [extension] methods [closed]

Does anyone have a complete list of LINQPad extension methods and methods, such as 4 Answers ...
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What is the purpose of “&&” in a shell command?

As far as I know, using & after the command is for running it in the background. 9 Answers ...
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Dependency Inject (DI) “friendly” library

...ably be classes intended for consumers to use directly on a regular basis, and "support classes" that are dependencies of those more common "end user" classes. ...