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第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...看本节例子最终运行效果：
编译运行环境：
nasm：Inter x86汇编编译工具，用户将我们的汇编代码编译为二进制。（下载地址）
Bochs：运行os的虚拟机工具，模拟加载我们生成的软盘映像，并运行os。（下载地址）
代码...
Create a unique number with javascript time
...r case I got into trouble very fast because of toString(36) which I assume converts numerical value to it's ascii representation, not sure though, but i can see the problem, if you call your uuid generator often enough, only last 3 chars are changing so the chances are high that you will get into a ...
How to present popover properly in iOS 8
...
Here i Convert "Joris416" Swift Code to Objective-c,
-(void) popoverstart
{
ViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"PopoverView"];
UINavigationController *nav = [[UINavigation...
UnicodeDecodeError when reading CSV file in Pandas with Python
...e to use Latin1 encoding because it accept any possible byte as input (and convert it to the unicode character of same code):
pd.read_csv(input_file_and_path, ..., encoding='latin1')
You know that most of the file is written with a specific encoding, but it also contains encoding errors. A real wo...
How can I create a simple message box in Python?
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this is not tkinter, it's not shipped by default, strange, who is interested with introducing such simple functionality to bring unnecessary dependencies?
– Tebe
Nov 22 '12 at 16:50
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How to get the first five character of a String
...
You can use Substring(int startIndex, int length)
string result = str.Substring(0,5);
The substring starts at a specified character position and has a
specified length. This method does not modify the value of the current
instance. Inste...
Difference between len() and .__len__()?
...ye, and generally should not be called directly.
It was decided at some point long ago getting the length of something should be a function and not a method code, reasoning that len(a)'s meaning would be clear to beginners but a.len() would not be as clear. When Python started __len__ didn't even e...
Are list-comprehensions and functional functions faster than “for loops”?
...ing tested this myself on the problem of computing distances between all points within a set of points, functional programming (using the starmap function from the built-in itertools module) turned out to be slightly slower than for-loops (taking 1.25 times as long, in fact). Here is the sample code...
How to execute a JavaScript function when I have its name as a string
I have the name of a function in JavaScript as a string. How do I convert that into a function pointer so I can call it later?
...
How many and which are the uses of “const” in C++?
...hods won't change the logical state of this object.
struct SmartPtr {
int getCopies() const { return mCopiesMade; }
};
Use const for copy-on-write classes, to make the compiler help you to decide when and when not you need to copy.
struct MyString {
char * getData() { /* copy: caller m...