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boost::filesystem指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
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//filesystem中最基本的类型
bf::path path("/tmp/test");
//对当前的目录的操作
bf::path old_cpath=bf::current_path(); //取得当前目录
bf::path file_path = path / "file"; //path重载了 / 运算符
//判断文件存在...
Get table column names in MySQL?
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In my quick test, SHOW COLUMNS returns a table containing the column names, types, etc, while SELECT COLUMN NAME returns just the column names.
– mwfearnley
Jul 20 '16 at 16:30
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How to calculate the running time of my program? [duplicate]
... used to calculate very short and precise program executions, such as unit testing and benchmarking. Thus, for overall program execution, milliseconds are preferable.
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What does numpy.random.seed(0) do?
... @LubedUpSlug you can decorate them – at least for some simple cases I tested it should work. def seed_first(fun, seed=0): | \tdef wrapped(*args, **kwargs): | \t\tnp.random.seed(seed) | \t\treturn fun(*args, **kwargs) | \treturn wrapped, and then for m in np.random.__all__: | \tif m != 'seed': |...
What's the difference between Ruby's dup and clone methods?
...zen object is also frozen (whereas a dup of a frozen object isn't).
class Test
attr_accessor :x
end
x = Test.new
x.x = 7
x.freeze
y = x.dup
z = x.clone
y.x = 5 => 5
z.x = 5 => TypeError: can't modify frozen object
Another difference is with singleton methods. Same story here, dup doesn't ...
How do I get an apk file from an Android device?
... On my device (Android 2.1) the command would be "adb pull /sdcard/test.jpg" to copy test.jpg from my sd card to the current dir. Please locate your iTwips.apk file first using "adb shell". This start a shell on your device and you can use the standard Unix commands like ls and cd to browse ...
xcode-select active developer directory error
...uild' requires Xcode, i.e., a full install of Xcode, nor CommandLineTools. Testing it here, switching to CommandLineTools doesn't stop the error, nor would it.
– mikemaccana
Sep 10 '14 at 15:11
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How to open, read, and write from serial port in C?
...) | CS8; // 8-bit chars
// disable IGNBRK for mismatched speed tests; otherwise receive break
// as \000 chars
tty.c_iflag &= ~IGNBRK; // disable break processing
tty.c_lflag = 0; // no signaling chars, no echo,
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What should every programmer know about security? [closed]
...f a security expert and/or cryptographer, always use a well-designed, well-tested, and mature security platform, framework, or library to do the work for you. These things have spent years being thought out, patched, updated, and examined by experts and hackers alike. You want to gain those advantag...
Is it possible to rename a maven jar-with-dependencies?
...h-dependencies" suffix.
The configuration below will output a jar called "test.jar"
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-4</version>
<executions>
<execution>
<id>jar-with-dependencies</id>
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