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Difference between abstraction and encapsulation?
...encapsulation is indeed a special kind of abstraction, namely a structural one. By considering something compound as a whole we basically ignore (abstract from) the details of how it is built up of something else, i.e. ignore its internal structure.
– proskor
J...
How to store a list in a column of a database table
...n a single column. Relational databases are designed specifically to store one value per row/column combination. In order to store more than one value, you must serialize your list into a single value for storage, then deserialize it upon retrieval. There is no other way to do what you're talking ab...
What is an unsigned char?
...numeric type is required to cover. sizeof (char) is required to be 1 (i.e. one byte), but a byte could in theory be for example 32 bits. sizeof would still be report its size as 1 - meaning that you could have sizeof (char) == sizeof (long) == 1.
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How to write to an existing excel file without overwriting data (using pandas)?
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This solution works fine. It has one drawback though. It breaks formulas and connections within the spreadsheet. Any ideas how to change this behaviour?
– BP_
Nov 27 '13 at 15:18
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How do I iterate over the words of a string?
..., "\n"));
}
Instead of copying the extracted tokens to an output stream, one could insert them into a container, using the same generic copy algorithm.
vector<string> tokens;
copy(istream_iterator<string>(iss),
istream_iterator<string>(),
back_inserter(tokens));
... ...
Why does integer division in C# return an integer and not a float?
Does anyone know why integer division in C# returns an integer and not a float?
What is the idea behind it? (Is it only a legacy of C/C++?)
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Stripping everything but alphanumeric chars from a string in Python
...ed the regular expressions to be slower. Interestingly, I tried this with one other option (valid_characters = string.ascii_letters + string.digits followed by join(ch for ch in string.printable if ch in valid_characters) and it was 6 microseconds quicker than the isalnum() option. Still much slow...
GB English, or US English?
...tend to do the same, but being careful of what Chris mentions - if you use one spelling in the API you should probably use the same one elsewhere in the project.
– Mark Baker
Oct 1 '08 at 14:55
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Regular Expressions and negating a whole character group [duplicate]
...examples I gave won't match 'ab' it's true but they also won't match 'a' alone and I need them to. Is there some simple way to do this?
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Map vs Object in JavaScript
...use it ensures the same performance in all browsers. So to me that's a big one.
The myMap.has(key) method will be especially handy, and also the myMap.size property.
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