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Creating a BLOB from a Base64 string in JavaScript
...his array of byte values into a real typed byte array by passing it to the Uint8Array constructor.
const byteArray = new Uint8Array(byteNumbers);
This in turn can be converted to a BLOB by wrapping it in an array and passing it to the Blob constructor.
const blob = new Blob([byteArray], {type: c...
What encoding/code page is cmd.exe using?
...<stdio.h>
#include <windows.h>
int main() {
int c, n;
UINT oldCodePage;
char buf[1024];
oldCodePage = GetConsoleOutputCP();
if (!SetConsoleOutputCP(65001)) {
printf("error\n");
}
freopen("uc-test-UTF-8-nobom.txt", "rb", stdin);
n = fread(buf, si...
How to get device make and model on iOS?
...turn identifier }
return identifier + String(UnicodeScalar(UInt8(value)))
}
return identifier
}
}
print(UIDevice.current.modelName)
The result should be:
// Output on a simulator
@"i386" on 32-bit Simulator
@"x86_64" on 64-bit Simul...
Draw a perfect circle from user's touch
...touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
uint pointCount = [pointStack count];
//assume the circle was drawn a constant rate and the half way point will serve to calculate or diameter
CGPoint startPoint = [pointStack objectAtIndex:0];
CGPoint halfWayPoi...
How to check file MIME type with javascript before upload?
... = new FileReader();
fileReader.onloadend = function(e) {
var arr = (new Uint8Array(e.target.result)).subarray(0, 4);
var header = "";
for(var i = 0; i < arr.length; i++) {
header += arr[i].toString(16);
}
console.log(header);
// Check the file signature against known types
};
...
How do I shutdown, restart, or log off Windows via a bat file?
...ctual function signature for ExitWindowsEx is:
BOOL WINAPI ExitWindowsEx(UINT uFlags, DWORD dwReserved);
in 2011: "Throwing garbage on the sidewalk: The sad history of the rundll32 program"
And to make it crystal-clear:
in 2013 "What's the guidance on when to use rundll32? Easy: Don't use i...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...OPSTRUCT
{
HWND hwnd; //父窗口句柄
UINT wFunc; //要执行的动作
LPCTSTR pFrom; //源文件路径，可以是多个文件
LPCTSTR pTo; //目标路径，可以是路径或文件名
FILEOP_FLAGS...
MFC RadioButton用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...数
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
DECLARE_MESSAGE_MAP()
public:
BOOL m_Radio1;
BOOL m_Radio3;
BOOL m_Radio7;
BOOL m_R...
Determine if string is in list in JavaScript
... , 2] to undefined. includes also works on JavaScript typed arrays such as Uint8Array.
If you're concerned about browser support (such as for IE or Edge), you can check Array.includes at CanIUse.Com, and if you want to target a browser or browser version that's missing includes, I recommend polyfill...
Modulo operation with negative numbers
... an "int" in this case, rather than "unsigned" even when both operands are uint32_t or bigger.
– Frederick Nord
Sep 24 '16 at 14:56
...