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What should every developer know about databases? [closed]

...rly work with databases or may have to work with one someday. And considering the amount of misuse and abuse in the wild, and the volume of database-related questions that come up every day, it's fair to say that there are certain concepts that developers should know - even if they don't design or ...
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What does the “Just” syntax mean in Haskell?

I have scoured the internet for an actual explanation of what this keyword does. Every Haskell tutorial that I have looked at just starts using it randomly and never explains what it does (and I've looked at many). ...
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Why is there no Constant feature in Java?

I was trying to identify the reason behind constants in Java I have learned that Java allows us to declare constants by using final keyword. ...
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How to find NSDocumentDirectory in Swift?

I'm trying to get path to Documents folder with code: 9 Answers 9 ...
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ResourceDictionary in a separate assembly

...ary files (MenuTemplate.xaml, ButtonTemplate.xaml, etc) that I want to use in multiple separate applications. I could add them to the applications' assemblies, but it's better if I compile these resources in one single assembly and have my applications reference it, right? ...
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Hashing a file in Python

...f your problem, I believe, when we consider the memory implications of working with very large files. We don't want this bad boy to churn through 2 gigs of ram for a 2 gigabyte file so, as pasztorpisti points out, we gotta deal with those bigger files in chunks! import sys import hashlib # BUF_SIZ...
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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?

Can anyone explain how to implement one-to-one, one-to-many and many-to-many relationships while designing tables with some examples? ...
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The Definitive C++ Book Guide and List

... Beginner Introductory, no previous programming experience C++ Primer * (Stanley Lippman, Josée Lajoie, and Barbara E. Moo) (updated for C++11) Coming at 1k pages, this is a very thorough introduction into C++ that covers just...
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Where is PHP.ini in Mac OS X Lion? Thought it was in /usr/local/php5/lib

...to run some PHP right on my Mac, uncommented httpd.conf, activated web sharing, installed MySQL etc. I can't seem to find my PHP files, most importantly, PHP.ini. ...
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Event system in Python

...or Python do you use? I'm already aware of pydispatcher , but I was wondering what else can be found, or is commonly used? ...