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What does “O(1) access time” mean?
I have seen this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean?
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Add a prefix to all Flask routes
...operly sub-mounting your app
If you are not sure what the first paragraph means, take a look at this example application with Flask mounted inside of it:
from flask import Flask, url_for
from werkzeug.serving import run_simple
from werkzeug.wsgi import DispatcherMiddleware
app = Flask(__name__)
a...
Why are flag enums usually defined with hexadecimal values
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Because [Flags] means that the enum is really a bitfield. With [Flags] you can use the bitwise AND (&) and OR (|) operators to combine the flags. When dealing with binary values like this, it is almost always more clear to use hexadecim...
What is the rationale behind having companion objects in Scala?
...esn't looks bad: like creating something abstract. Give those names a real meaning.
Consider using immutable, method less, case classes and seal the abstract base class.
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Does MySQL ignore null values on unique constraints?
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@Pijusn What do you mean by "constraint has nothing to do with index?" Also about your second sentence, I never said that you could have a row with a NULL value, that's why I stated at the beginning of the post, that this is a solution only if h...
Is it possible to make an HTML anchor tag not clickable/linkable using CSS?
...tance in using any framework is ridiculous. PHP is written in C. Does that mean you should write C and not use PHP? iOS has UIKit, Core Data, Quartz, etc. Flash has tons of commonly used 3rd party libraries. Again, each framework has its purpose. A purist, not-built-in-house mentality won't help any...
Drawing Isometric game worlds
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Either way gets the job done. I assume that by zigzag you mean something like this: (numbers are order of rendering)
.. .. 01 .. ..
.. 06 02 ..
.. 11 07 03 ..
16 12 08 04
21 17 13 09 05
22 18 14 10
.. 23 19 15 ..
.. 24 20 ..
.. .. 25 .. ..
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What is state-of-the-art for text rendering in OpenGL as of version 4.1? [closed]
... which explains distance field rendering in great detail.
Update 2016:
Meanwhile, there exist several additional techniques which aim to remove the corner rounding artefacts which become disturbing at extreme magnifications.
One approach simply uses pseudo-distance fields instead of distance fi...
jQuery ajax error function
...y from this object to get the error code, like if we get status = 404 this means that requested page could not be found. It doesn't exists at all. Based on that status code we can redirect users to login page or whatever our business logic requires.
exception:
This is string variable which shows t...
Is there any way to put malicious code into a regular expression?
...n some of these, the set of possible properties is user‐extensible. That means you can have custom properties that are actual code callouts to named functions in some particular namepace, like \p{GoodChars} or \p{Class::Good_Characters}. How your language handles those might be worth looking at. ...