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Creating an empty bitmap and drawing though canvas in Android
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This is probably simpler than you're thinking:
int w = WIDTH_PX, h = HEIGHT_PX;
Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types
Bitmap bmp = Bitmap.createBitmap(w, h, conf); // this creates a MUTABLE bitmap
Canvas canvas = new Canvas(bmp);
// ready to draw on t...
C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++特化模板函数的符号多重定义错误问题error LNK2005: "void __stdcall SerializeElements<class CLogEvent> ...fatal error LNK1169: 找到一个或多个多重定义的符号.我...特化模板函数SerializeElements时，报重复定义的错误，如下：
error LNK2005: "void __std...
How does JavaScript .prototype work?
...reation), and
The standardized accessor (ie. getter/setter) property named __proto__ (similar to 4.)
Object.getPrototypeOf and Object.setPrototypeOf are preferred over __proto__, in part because the behavior of o.__proto__ is unusual when an object has a prototype of null.
An object's [[Prototype...
How to get the concrete class name as a string? [duplicate]
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instance.__class__.__name__
example:
>>> class A():
pass
>>> a = A()
>>> a.__class__.__name__
'A'
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ExpressJS How to structure an application?
...ike to structure a medium-sized express.js application.
focusaurus/express_code_structure is the repo with the latest code for this. Pull requests welcome.
Here's a snapshot of the README since stackoverflow doesn't like just-a-link answers. I'll make some updates as this is a new project that I'l...
(HTML) Download a PDF file instead of opening them in browser when clicked
... support seems to be enhanced for this feature, see: w3schools.com/tags/att_a_download.asp
– Daniel Resch
Aug 24 '19 at 21:51
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Unittest setUp/tearDown for several tests
...(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls._connection = createExpensiveConnectionObject()
@classmethod
def tearDownClass(cls):
cls._connection.destroy()
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'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
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Not only did I use set brackets, but I did say sub_set_. :-) Unless you employ weird things like Kuratowski's definition, you can't be a subset of an ordered pair. :-] (TypeError: '<=' not supported between instances of 'set' and 'tuple', Python would say.;)
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CSS: background image on background color
...nswered Jan 15 '18 at 17:12
Risa__BRisa__B
39544 silver badges88 bronze badges
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“Inner exception” (with traceback) in Python?
...peError("test")
except TypeError, e:
raise MyException(), None, sys.exc_info()[2]
Always do this when catching one exception and re-raising another.
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