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What's the recommended way to connect to MySQL from Go?
...l { /* error handling */}
items := make([]*SomeStruct, 0, 10)
var ida, idb uint
for rows.Next() {
err = rows.Scan(&ida, &idb)
if err != nil { /* error handling */}
items = append(items, &SomeStruct{ida, idb})
}
Insert :
_, err = con.Exec("insert into tbl (id, mdpr, isok) ...
std::wstring VS std::string
...CS-2 is not sufficient, than switch to UCS-4 (typedef std::basic_string<uint32_t> UCS2String)
ICU or other unicode libraries?
For advanced stuff.
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How can I generate random alphanumeric strings?
...; i < size; i++)
{
var rnd = BitConverter.ToUInt32(data, i * 4);
var idx = rnd % chars.Length;
result.Append(chars[idx]);
}
return result.ToString();
}
public static string GetUniqueKeyOriginal_...
Get a pixel from HTML Canvas?
...ray(4) [0, 251, 0, 255]
b = idt.data.subarray(188411*4, 188411*4 + 4) // Uint8ClampedArray(4) [0, 251, 0, 255]
a[0] = 255 // Does nothing
getPixel(idt, 188411), // Array(4) [0, 251, 0, 255]
b[0] = 255 // Mutates the original imgData.data
getPixel(idt, 188411), // Array(4) [255, 251, 0, 255]
// ...
How does a hash table work?
...ow as keys is bigger than the space of things you are using to index (your uint32's or whatever) then you can't possibly have a unique value for each one. When two or more things hash to the same result, you'll have to handle the redundancy in an appropriate way (this is usually referred to as a co...
How to detect a Christmas Tree? [closed]
...il, sqrt
"""
Inputs:
rgbimg: [M,N,3] numpy array containing (uint, 0-255) color image
hueleftthr: Scalar constant to select maximum allowed hue in the
yellow-green region
huerightthr: Scalar constant to select minimum allowed hue in the
...
MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ion
int Y, // vertical position
int cx, // width
int cy, // height
UINT uFlags // window-positioning flags
);
参数解释:
hWnd
Identifies the window. 窗口句柄
hWndInsertAfter 窗口叠层位置
Identifies the window to precede the positioned window in the Z order. This pa...
Array.Copy vs Buffer.BlockCopy
...
@KevinMiller: uh, UInt16 is two bytes per element. If you pass this array to BlockCopy along with the number of elements in the array, of course only half the array will be copied. For this to work properly, you would need to pass the number o...
How to use background thread in swift?
... 8.It gives error as "QOS_CLASS_BACKGROUND" return class and it is of type UInt32 and "dispatch_get_global_queue" requires 1st parameter as int so type error is coming.
– Zalak Patel
Oct 29 '14 at 12:43
...
How can I sharpen an image in OpenCV?
...55 * np.ones(sharpened.shape))
sharpened = sharpened.round().astype(np.uint8)
if threshold > 0:
low_contrast_mask = np.absolute(image - blurred) < threshold
np.copyto(sharpened, image, where=low_contrast_mask)
return sharpened
def example():
image = cv.imread('...