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Understanding checked vs unchecked exceptions in Java
...on class which also represents a conceptual categorization of exceptions - mixing two aspects that are not necessarily related at all.
– Michael Borgwardt
Nov 14 '13 at 21:46
2
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Booleans, conditional operators and autoboxing
Why does this throw NullPointerException
4 Answers
4
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What are the pros and cons of performing calculations in sql vs. in your application
... depends on a lot of factors - but most crucially:
complexity of calculations (prefer doing complex crunching on an app-server, since that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot of data, doing it at the db server will save bandwi...
Create the perfect JPA entity [closed]
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@TheStijn This is the good mixed scenario. It justifies the need of implementing eq/hC as you initially suggested because once the entities abandon the safety of the persistence layer you can no longer trust the rules enforced by the JPA standard. In o...
How can I tell if a DOM element is visible in the current viewport?
...ers. This technique is no longer recommended and you should use Dan's solution if you do not need to support version of Internet Explorer before 7.
Original solution (now outdated):
This will check if the element is entirely visible in the current viewport:
function elementInViewport(el) {
var...
Android REST client, Sample?
...for you. More importantly, some of these libraries handle device configuration changes for you.
The original answer is retained below for reference. But please also take the time to examine some of the Rest client libraries for Android to see if they fit your use cases. The following is a list of so...
Change column type from string to float in Pandas
...mn of a DataFrame.
>>> s = pd.Series(["8", 6, "7.5", 3, "0.9"]) # mixed string and numeric values
>>> s
0 8
1 6
2 7.5
3 3
4 0.9
dtype: object
>>> pd.to_numeric(s) # convert everything to float values
0 8.0
1 6.0
2 7.5
3 3.0
4 0.9
dtype:...
What does O(log n) mean exactly?
...ber, find the person or business with that number.
O(n log n): There was a mix-up at the printer's office, and our phone book had all its pages inserted in a random order. Fix the ordering so that it's correct by looking at the first name on each page and then putting that page in the appropriate sp...
How should I read a file line-by-line in Python?
...on's relatively deterministic reference-counting scheme for garbage collection. Other, hypothetical implementations of Python will not necessarily close the file "quickly enough" without the with block if they use some other scheme to reclaim memory.
In such an implementation, you might get a "too...
Advantage of creating a generic repository vs. specific repository for each object?
...tcher, IDataUpdater, IDataInserter, and IDataDeleter (for example) you can mix-and-match to define your requirements through the interface and then have implementations that take care of some or all of them, and I can still inject the does-it-all implementation to use while I'm building the app out....