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Array or List in Java. Which is faster?
... of generic types. (They do however support runtime typechecking, but that mixes badly with generic types.)
But, as always, when optimizing you should always follow these steps:
Don't optimize until you have a nice, clean, and working version of your code. Changing to generic types could very wel...
When to wrap quotes around a shell variable?
...ther useful concept, which I like to call "seesaw quoting". If you need to mix single and double quotes, you can use them adjacent to each other. For example, the following quoted strings
'$HOME '
"isn't"
' where `<3'
"' is."
can be pasted together back to back, forming a single long string af...
Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?
... 1.6.0_07-b06"), and the HotSpot version (on mine, that's "build 10.0-b23, mixed mode"). I suspect the "11.0" you are seeing is the HotSpot version.
Update: HotSpot is (or used to be, now they seem to use it to mean the whole VM) the just-in-time compiler that is built in to the Java Virtual Machi...
How to call asynchronous method from synchronous method in C#?
...rom my AsyncEx library. The official .NET libs don't provide much help for mixing sync and async code (and in general, you shouldn't do it!). I'm waiting for .NET 4.5 RTW and a new non-XP laptop before updating AsyncEx to run on 4.5 (I cannot currently develop for 4.5 because I'm stuck on XP for a f...
How is “int* ptr = int()” value initialization not illegal?
...r because it also tosses the benefit of extra compile-time checks into the mix.
– Jamin Grey
Feb 27 '13 at 1:07
3
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What is opinionated software?
...
I agree with altCognito. .NET encourages the developer to mix Model and View in WinForms apps by making it brain-dead easy to put business logic in methods generated by the button click event, for example. In this way, Microsoft indirectly encourages short-sighted developers to lock...
Convert a String In C++ To Upper Case
...3 -march=native on a Core2Duo (Merom). The same string of 120 characters (mixed lowercase and non-lowercase ASCII), converted in a loop 40M times (with no cross-file inlining, so the compiler can't optimize away or hoist any of it out of the loop). Same source and dest buffers, so no malloc overhe...
Why use static_cast(x) instead of (int)x?
...ynamic_cast, as those would indicate places that can be redesigned. C-cast mixes in all together and doesn't give you the reason for casting.
– Dragan
May 18 at 13:58
add a co...
how to check the dtype of a column in python pandas
...('<M8[ns]'), 'is_int64 = False')
It will be misleading in the case of mixed type of data in single column:
df2 = pd.DataFrame({'data': [12, pd.Timestamp('2013-01-02')]},
index = ['A', 'B'])
for col in df2.columns:
df2[col].dtype, 'is_int64 = %s' % isinstance(df2.loc['A', ...
How do I undo the most recent local commits in Git?
...In which case, it's better no leave out the --soft (which will result in --mixed which is the default) and then you can restage the changes you meant to commit.
– dmansfield
Jul 2 '14 at 21:19
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