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Is !important bad for performance?
...
I know... I'm just making fun of how extremely picky people do get when it comes to performance, by taking that pickiness to the next level.
– BoltClock♦
Dec 6 '12 at 12:45
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Swapping column values in MySQL
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Ok, so just for fun, you could do this! (assuming you're swapping string values)
mysql> select * from swapper;
+------+------+
| foo | bar |
+------+------+
| 6 | 1 |
| 5 | 2 |
| 4 | 3 |
+------+------+
3 rows in s...
How to identify numpy types in python?
...
Use the builtin type function to get the type, then you can use the __module__ property to find out where it was defined:
>>> import numpy as np
a = np.array([1, 2, 3])
>>> type(a)
<type 'numpy.ndarray'>
>>> type...
使用Activity启动器组件 · App Inventor 2 中文网
...页，例如，
Action：android.intent.action.VIEW
DataUri：https://www.fun123.cn
使用预先指定的消息启动邮件程序
2020 年 1 月 26 日：此示例已更新以适应 android 中的更改。 此处显示的电子邮件发送代码将在下一个应用程序发明者版本中运行...
Does Swift support reflection?
...verybody's figured out, the engineers I spoke with confirmed the reflect() function exists to support the Playground. But you can still have some fun with it :) here i've hacked out a little model serializer using it. Paste it into the Playground and have fun: gist.github.com/mchambers/67640d9c3e2bc...
How do you obtain a Drawable object from a resource id in android package?
...n your project.You just change in this method
object ResourceUtils {
fun getColor(context: Context, color: Int): Int {
return ResourcesCompat.getColor(context.getResources(), color, null)
}
fun getDrawable(context: Context, drawable: Int): Drawable? {
return ResourcesC...
Studies on optimal code width?
...n one line
Limits indentation which in turn limits complexity of methods / functions
Yes, it should be part of the coding standard.
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How to convert a string to integer in C?
...You might also be interested in strtoumax and strtoimax which are standard functions in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall...
Why can I use auto on a private type?
...orks for the same reason you can pass objects of private types to template functions:
template <typename T>
void fun(T t) {}
int main() {
Foo f;
fun(f.Baz()); // ok
}
And why can we pass objects of private types to template functions, you ask? Because only the name of the t...
Extracting bits with a single multiplication
...tsThroughAndWithMultiplication.smt2
The result is:
sat
(model
(define-fun mask () (_ BitVec 64)
#x8080808080808080)
(define-fun multiplicand () (_ BitVec 64)
#x0002040810204081)
)
Bingo! It reproduces the result given in the original post in 0.06 seconds.
Looking at this from a mo...