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When and why are database joins expensive?
... on you) and are indignantly setting hand to keyboard to tell me that you know for a fact that denormalisation is faster, sorry but you're living in one of the special cases - specifically, the case where you process all of the data, in-order. It's not a general case, and you are justified in your s...
How does HTTP file upload work?
... uploaded file determined by browser?
application/x-www-form-urlencoded
Now change the enctype to application/x-www-form-urlencoded, reload the browser, and resubmit.
Firefox sent:
POST / HTTP/1.1
[[ Less interesting headers ... ]]
Content-Type: application/x-www-form-urlencoded
Content-Length:...
C++ IDE for Linux? [closed]
...ev: refactoring requires parsing the source code in some way. As far as I know, no VIM modules do that so the answer to your question is “none.” That's one of the reasons to prefer an IDE for IDE-centered languages such as Java. Since refactoring support (etc) for C++ is so minimal anyway (even ...
What is the argument for printf that formats a long?
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Yep Dr Beco; further, just %l triggers warning: unknown conversion type character 0x20 in format [-Wformat]
– Patrizio Bertoni
Jul 29 '15 at 10:53
add ...
Token Authentication vs. Cookies
...er. This way the server can maintain a session with the stateless client, knowing mostly everything about the app's state, but stored in the server. In this scenario at no moment does the client hold state, which is not how Ember.js works.
In Ember.js things are different. Ember.js makes the program...
Understanding colors on Android (six characters)
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@TheUnwokenFool, this answer may be outdated now. I don't see anything either about setting opacity levels for text. If there appear to be any contradictions go with the current guidelines.
– Suragch
Jan 7 '19 at 23:03
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Design patterns or best practices for shell scripts [closed]
Does anyone know of any resources that talk about best practices or design patterns for shell scripts (sh, bash etc.)?
9 An...
What does the “yield” keyword do?
... print(i)
0
1
4
Here it's a useless example, but it's handy when you know your function will return a huge set of values that you will only need to read once.
To master yield, you must understand that when you call the function, the code you have written in the function body does not run. The ...
What does the red exclamation point icon in Eclipse mean?
...her problems in a project. The Package Explorer and Project Explorer views now show a new decorator on Java projects and working sets that contain build path errors:
The concrete errors can be seen in the Problems view, and if you open the view menu and select Group By > Java Problem Type, the...
Can I store images in MySQL [duplicate]
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haha, Don't just scare people. I don't know how it was in 2011 but now DBs are so improved and store blob columns separated from the normal data, you'll never notice a change of speed. there is even streamline too
– azerafati
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