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In Java, what is the best way to determine the size of an object?
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To determine size of Object "obj" use:org.openjdk.jol.info.GraphLayout.parseInstance(obj).totalSize();
– vigor
Jan 19 '17 at 9:26
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data.table vs dplyr: can one do something well the other can't or does poorly?
...processing time. We optimise dplyr for expressiveness on medium data;
feel free to use data.table for raw speed on bigger data.
The flexibility of dplyr also means that you can easily tweak performance
characteristics using the same syntax. If the performance of dplyr with
the data frame backend is...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...windows 7 x64 操作系统上的 IDT 表的设置：
<bochs:2> info idt
Interrupt Descriptor Table (base=0xfffff80004fea080, limit=4095):
IDT[0x00]=64-Bit Interrupt Gate target=0x0010:fffff80003abac40, DPL=0
IDT[0x01]=64-Bit Interrupt Gate target=0x0010:fffff80003abad40, DPL=0
ID...
How do I pass a unique_ptr argument to a constructor or a function?
...library function.
If you take a unique_ptr by value, you can move from it freely. But movement doesn't actually happen because of std::move. Take the following statement:
std::unique_ptr<Base> newPtr(std::move(oldPtr));
This is really two statements:
std::unique_ptr<Base> &&...
A semantics for Bash scripts?
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The bash manpage has quite a bit more info than most manpages, and includes some of what you're asking for. My assumption after more than a decade of scripting bash is that, due to its' history as an extension of sh, it has some funky syntax (to maintain backwar...
Bidirectional 1 to 1 Dictionary in C#
...rializableAttribute.
Debug view using DebuggerDisplayAttribute (with Count info) and DebuggerTypeProxyAttribute (for displaying key-value pairs in watches).
Reverse dictionary is available as IDictionary<TValue, TKey> Reverse property and also implements all interfaces mentioned above. All ope...
User recognition without cookies or local storage
...et or Com Object would have been an easy solution using a hash of hardware information, but these days people are so security-aware that it would be difficult to get people to install these kinds of programs on their system. This leaves you stuck with using Cookies and other, similar tools.
Cookies...
Simple way to encode a string according to a password?
... key. Passwords are for when only an end-user needs access to the specific information. Even then, you usually secure the application with a password, then exchange encrypted information using a key, perhaps one attached to the user account.
Symmetric key encryption
Fernet – AES CBC + HMAC, stro...
Does anyone beside me just NOT get ASP.NET MVC? [closed]
...od - saying you don't understand why something is good and asking for more information is awesome. This answer, though, is very strange - you're basically stating "I don't understand either", but wrapping it in a story.
– orip
Dec 24 '08 at 16:39
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UnicodeDecodeError when redirecting to file
...2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print sys.stdout.encoding
UTF-8
If your input characters can be encoded with the terminal's encoding, Python will do so and will send the corresponding bytes to your terminal...