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Why are joins bad when considering scalability?

... learn of things like the various normal forms (1st, 2nd, 3rd, Boyce-Codd, etc.), and we learn about different types of keys (primary, foreign, alternate, unique, etc.) and how these things fit together to design a database. And we learn the rudiments of SQL as well as manipulating both structure a...
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Android destroying activities, killing processes

...istent data, stop animations and other things that may be consuming CPU, etc. Implementations of this method must be very quick because the next activity will not be resumed until this method returns. Followed by either onResume() if the activity returns back to the front, or onStop() if it ...
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Generating an Excel file in ASP.NET [closed]

...l configurations (i.e. List separator) Can't apply formatting, formulas, etc HTML Pros: Still pretty Simple Supports simple formating and formulas Cons: You have to name the file as xls and Excel may warn you about opening a non native Excel file One worksheet per workbook OpenXML (O...
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What is a stream?

...put/output (which is not seekable unless buffered), sockets, serial ports, etc. So you can write code which says either "I want some data, and I don't care where it comes from or how it got here", or "I'll produce some data, and it's entirely up to my caller what happens to it". The former takes an ...
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Install dependencies globally and locally using package.json

... want to do is just put those types of command dependencies for build/test etc. in the devDependencies section of your package.json. Anytime you use something from scripts in package.json your devDependencies commands (in node_modules/.bin) act as if they are in your path. For example: npm i --save...
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AngularJS : Initialize service with asynchronous data

...pp. This is a slight enhancement over Martin's solution, which deferred fetching the config until after the document is ready. As far as I know, there is no reason to delay the $http call for that. Unit Testing Note: I have discovered this solution does not work well when unit-testing when the ...
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Disadvantages of Test Driven Development? [closed]

...tch an evolving visual behavior, different AI spec, behavioral algorithms, etc.. will cause big time investment in repeated test definitions since we keep on changing the desired test results. – Adi Sep 19 '08 at 0:47 ...
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Java HashMap performance optimization / alternative

...done simpler as follows: int result = a[0]; result = result * 52 + a[1]; //etc. – rsp Nov 19 '09 at 16:20 I agree that...
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glVertexAttribPointer clarification

... attributes are just the new way of defining vertices, texcoords, normals, etc. for drawing. VAOs store state. I'm first going to explain how drawing works with vertex attributes, then explain how you can cut down the number of method calls with VAOs: You must enable an attribute before you can us...
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Large-scale design in Haskell? [closed]

...in types (this code accesses hardware, this code is a single-user session, etc.) E.g. the X monad in xmonad, captures precisely the design for what state is visible to what components of the system. Type classes and existential types Use type classes to provide abstraction: hide implementations ...