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Running JAR file on Windows
I have a JAR file named helloworld.jar .
In order to run it, I'm executing the following command in a command-line window:
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Efficiently updating database using SQLAlchemy ORM
...t at times doing a large query and then iterating in python can be up to 2 orders of magnitude faster than lots of queries. I assume that iterating over the query object is less efficient than iterating over a list generated by the all() method of the query object.
[Please note comment below - thi...
Will the Garbage Collector call IDisposable.Dispose for me?
...managed ones) are cleaned up, then you still want finalization to occur in order to do as much cleanup as possible. Better to move the GC.SuppressFinalize call into the Dispose() method after the call to Dispose(true). See Framework Design Guidelines and this post.
– BitMask777...
C++ Best way to get integer division and remainder
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Does the order matter? For example if you are iterating over a /= - you might need to use a temporary variable to keep division first.
– AnnanFay
Dec 8 '16 at 15:15
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In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
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+1, thanks. It's sad it doesn't do this automatically. Very wet IMHO.
– Marc-André Lafortune
Feb 26 '13 at 20:31
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Pandas - Get first row value of a given column
.... See below for an explanation of why. Because a subtle difference in
the order of indexing makes a big difference in behavior, it is better to use single indexing assignment:
df.iloc[0, df.columns.get_loc('Btime')] = x
df.iloc[0, df.columns.get_loc('Btime')] = x (recommended):
The recommende...
What is Scala's yield?
... @Eldritch Conundrum - Which interestingly enough is the same order in which the original SQL spec outlines. Somewhere along the way the SQL language inverted the order, but it makes complete sense to first describe what you are pulling from followed by what you expect to get out of it...
Does use of final keyword in Java improve the performance?
...arlier tests will warmup the JVM and benefit the later test invocations. Reorder your tests and see what happens. You need to run each test in its own JVM instance.
– Steve Kuo
Jun 5 '14 at 21:56
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CSS transition shorthand with multiple properties?
...0vw;
opacity: 0;
transition-property: max-width, opacity; // relative order
transition-duration: 2s, 4s; // effects relatively ordered animation properties
transition-delay: 6s; // effects delay of all animation properties
animation-timing-function: ease;
&:hover {
max-width: 1...
What is the most effective way for float and double comparison?
...loating point numbers for depends on the context. Since even changing the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comp...