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How to detect if a variable is an array
...rn toString.call(obj) === "[object Array]";
}
(snippet taken from jQuery v1.3.2 - slightly adjusted to make sense out of context)
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How to implement a tree data-structure in Java? [closed]
...an populate them into a tree using your library.
– d4v1dv00
Apr 7 '15 at 15:03
1
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...工作，因此不会阻塞主 UI 线程。这对于在可能需要超过 100 毫秒左右的操作期间获得良好的用户体验非常重要。阻塞主 UI 线程将使您的应用程序看起来“冻结”并变得无响应，用户不喜欢这样。
当您需要执行需要一段时间的数...
How do I detect unsigned integer multiply overflow?
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100
and of course you could rename highestOneBitPosition to log :)
– Oliver Hallam
Jan 25 '10 at 18:14
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Set attributes from dictionary in python
... self.z="name"
if you want to set the attributes at once
d = {'x':100,'y':300,'z':"blah"}
a = A()
a.__dict__.update(d)
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Which is the preferred way to concatenate a string in Python?
...(b):
0.010656118392944336
The end string, therefore, ends up being about 100MB long. That was pretty slow, appending to a list was much faster. That that timing doesn't include the final a.join(). So how long would that take?
a.join(a):
0.43739795684814453
Oups. Turns out even in this case, ap...
Is there an easy way to check the .NET Framework version?
...its own directory below C:\Windows\Microsoft.NET\Framework (subdirectories v1.0.3705, v1.1.4322, v2.0.50727, v3.0, v3.5 and v4.0.30319).
Since version 4.5 this has been changed: Each version of .NET (i.e. 4.5.x, 4.6.x, 4.7.x, 4.8.x, ...) is being installed in the same subdirectory v4.0.30319 - so y...
Accurate way to measure execution times of php scripts
...eturned does contain the microseconds... Best solution is to times this by 1000... see stackoverflow.com/questions/3656713/… as an example..
– Angry 84
Jun 2 '16 at 2:01
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Convert Bitmap to File
...ncase people are wondering what Quality metric is. It is scale of 0 low to 100, high similar to photoshop export etc. As mentioned, its ignored for PNG, but you might wish to use CompressFormat.JPEG. As per google doco: Hint to the compressor, 0-100. 0 meaning compress for small size, 100 meaning co...
Resize image in PHP
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function scale($scale) {
$width = $this->getWidth() * $scale/100;
$height = $this->getheight() * $scale/100;
$this->resize($width,$height);
}
function resize($width,$height) {
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($...