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What is the difference between HashSet and List?
...
Unlike a List<> ...
A HashSet is a List with no duplicate members.
Because a HashSet is constrained to contain only unique entries, the internal structure is optimised for searching (compared with a list) - it is consider...
Error 'LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt' after
...ad explains how to fix it.
To summarize:
Either disable incremental linking, by going to
Project Properties
-> Configuration Properties
-> Linker (General)
-> Enable Incremental Linking -> "No (/INCREMENTAL:NO)"
or install VS2010 SP1.
Edits (@CraigRinger):...
MongoDB: Combine data from multiple collections into one..how?
...rg/display/DOCS/MapReduce#MapReduce-Outputoptions). You need to have some key in both collections that you can use as an _id.
For example, let's say you have a users collection and a comments collection and you want to have a new collection that has some user demographic info for each comment.
Le...
How to initialize private static members in C++?
...a member in C++? I tried this in my header file, but it gives me weird linker errors:
17 Answers
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Is it pythonic to import inside functions?
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In the long run I think you'll appreciate having most of your imports at the top of the file, that way you can tell at a glance how complicated your module is by what it needs to import.
If I'm adding new code to an existing file I'll usually do ...
Android - Pulling SQlite database android device
I've looked everywhere and i can't find a real precise answer or a tutorial on how, if it is possible, to do this.
19 Answe...
How to throw an exception in C?
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Brian R. BondyBrian R. Bondy
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How to add text to a WPF Label in code?
...id but cannot find out how to add a text to a WPF Label control in code. Like following for a TextBlock:
6 Answers
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int a[] = {1,2,}; Weird comma allowed. Any particular reason?
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It makes it easier to generate source code, and also to write code which can be easily extended at a later date. Consider what's required to add an extra entry to:
int a[] = {
1,
2,
3
};
... you have to add the comma t...
what is the most efficient way of counting occurrences in pandas?
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I think df['word'].value_counts() should serve. By skipping the groupby machinery, you'll save some time. I'm not sure why count should be much slower than max. Both take some time to avoid missing values. (Compare with size.)
In ...