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How to calculate age (in years) based on Date of Birth and getDate()
...used this query in our production code for nearly 10 years:
SELECT FLOOR((CAST (GetDate() AS INTEGER) - CAST(Date_of_birth AS INTEGER)) / 365.25) AS Age
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Why is sizeof considered an operator?
...fine. They're often seen, firstly because they're needed as part of a type cast expression, and secondly because sizeof has very high precedence, so sizeof a + b isn't the same as sizeof (a+b). But they aren't part of the invocation of sizeof, they're part of the operand.
You can't take the address ...
How can I convert String to Int?
...t for noobish people what 'out x' does is set the value of x to the string-cast-as-integer, if the casting is successful. I.e. in this case, x = 0 if the string has any non-integer characters, or x = value of string-as-integer otherwise. So the neat thing is this is one short expression which tells ...
Set android shape color programmatically
...against usual suspects:
if (background instanceof ShapeDrawable) {
// cast to 'ShapeDrawable'
ShapeDrawable shapeDrawable = (ShapeDrawable) background;
shapeDrawable.getPaint().setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
} else if (background instanceof GradientDrawab...
$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
...ts regardless if the request was sent with POST headers. An empty array is cast to false in a boolean check.
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Running multiple commands with xargs
In the example above, xargs takes echo % as the command argument. But in some cases, I need multiple commands to process the argument instead of one. For example:
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How to Unit test with different settings in Django?
.../#overriding-settings
TestCase will have a self.settings context manager, and there will also be an @override_settings decorator that can be applied to either a test method or a whole TestCase subclass.
These features did not exist yet in Django 1.3.
If you want to change settings for all your te...
Format number to 2 decimal places
...
How about
CAST(2229.999 AS DECIMAL(6,2))
to get a decimal with 2 decimal places
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【精心整理】【实用】visual C++中最常用的类与API函数 - C/C++ - 清泛网 -...
【精心整理】【实用】visual C++中最常用的类与API函数这篇文章能让初学者快速了解visual C++MFC中常见的核心的类与函数，虽然全部看下来有点枯燥，但对初学者快速了解MFC的框架结构很有好处。...这篇文章能让初学者快速了解visu...
Is null check needed before calling instanceof?
...lue of the RelationalExpression is
not null and the reference could be
cast to the ReferenceType
without raising a ClassCastException.
Otherwise the result is false."
So if the operand is null, the result is false.
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