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Why does the default parameterless constructor go away when you create one with parameters
...llowing it to be suppressed
Option 1 is somewhat attractive, in that the more I code the less often I really want a parameterless constructor. Some day I should count just how often I actually end up using a default constructor...
Option 2 I'm fine with.
Option 3 goes against the flow of both Ja...
Non-Relational Database Design [closed]
...reduce as a means of querying a database is unfamiliar, and requires a lot more thinking than writing SQL. There is a fairly small number of primitives, so getting the results you need is primarily a question of being creative with how you specify the keys.
There is a limitation in that queries ca...
What is the difference between integration and unit tests?
...ce they stress the code in a scenario close to reality. They invoke one or more software methods or features and test if they act as expected.
On the opposite, a Unit test testing a single method relies on the (often wrong) assumption that the rest of the software is correctly working, because it e...
Should I hash the password before sending it to the server side?
...instead of that I sent the hash of the password to the server? Would it be more secure?
12 Answers
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Easiest way to flip a boolean value?
...l to have a TOGGLE(a) macro. This prevents some mistakes and makes it all more readable on narrow screens.
– OJW
Oct 1 '10 at 12:17
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Private vs Protected - Visibility Good-Practice Concern [closed]
...of thumb is: make everything as private as possible. This makes your class more encapsulated, and allows for changing the internals of the class without affecting the code using your class.
If you design your class to be inheritable, then carefully choose what may be overridden and accessible from...
Can regular expressions be used to match nested patterns? [duplicate]
...va. Finding an existing grammar for Java (or C) is also not difficult.
For more background: Automata Theory at Wikipedia
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Paging in a Rest Collection
... general solution to Rest paging. This isn't a solution for a single case, more of what the general solution should be. Not all documents/collections fit the Atom model and there's no reason to force it unless required.
– Karl Guertin
Jun 1 '09 at 2:43
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Checking in of “commented out” code [closed]
... in complete functionality
If the first and second conflict (e.g. it takes more than a day to make the functionality work) then the task is too large - break it into smaller completable tasks.
This means:
Commented-out code should never be checked in since it is not functional
Commenting is not ...
Pandas conditional creation of a series/dataframe column
...reen
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blue when (df['Set'] == 'Z') & (df['Type'] == 'B')
otherwise purple ...