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Inheritance vs. Aggregation [closed]
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It's not a matter of which is the best, but of when to use what.
In the 'normal' cases a simple question is enough to find out if we need inheritance or aggregation.
If The new class is more or less as the original class. ...
How can I tell where mongoDB is storing data? (its not in the default /data/db!)
My host came with a mongodb instance and there is no /db directory so now I am wondering what I can do to find out where the data is actually being stored.
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Copy file or directories recursively in Python
...hutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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What's the valid way to include an image with no src?
I have an image that I will dynamically populate with a src later with javascript but for ease I want the image tag to exist at pageload but just not display anything. I know <img src='' /> is invalid so what's the best way to do this?
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Calling clojure from java
Most of the top google hits for "calling clojure from java" are outdated and recommend using clojure.lang.RT to compile the source code. Could you help with a clear explanation of how to call Clojure from Java assuming you have already built a jar from the Clojure project and included it in the cl...
Explain the use of a bit vector for determining if all characters are unique
I am confused about how a bit vector would work to do this (not too familiar with bit vectors). Here is the code given. Could someone please walk me through this?
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Python function global variables?
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If you want to simply access a global variable you just use its name. However to change its value you need to use the global keyword.
E.g.
global someVar
someVar = 55
This would change the value of the global variable to 55. Otherwise it would just assign 55 to a local variable.
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How do you use “
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<<- is most useful in conjunction with closures to maintain state. Here's a section from a recent paper of mine:
A closure is a function written by another function. Closures are so called because they enclose the environment of the parent function, and can ...
Why can't I push to this bare repository?
Can you explain what is wrong with this workflow?
6 Answers
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What does this Google Play APK publish error message mean?
...e. Clicking "Deactivate" on the dropdown next to version 3 appeared to fix it.
My guess is that this is a very-poorly-worded error message meaning something like "your original APK hasn't been published to all the update servers yet, so some of them may miss that version entirely". But it's a bit o...