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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...
Standard C Preprocessor
$ cat xx.c
#define VARIABLE 3
#define PASTER(x,y) x ## _ ## y
#define EVALUATOR(x,y) PASTER(x,y)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# 1 "<built-in>"
# 1 "<...
What's the correct way to sort Python `import x` and `from x import y` statements?
...m g import yy # changed gg->yy for illustrative purposes
import x
from xx import xx
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How do I write a correct micro-benchmark in Java?
...ral tens of thousands of inner loop iterations.)
Rule 2: Always run with -XX:+PrintCompilation, -verbose:gc, etc., so you can verify that the compiler and other parts of the JVM are not doing unexpected work during your timing phase.
Rule 2.1: Print messages at the beginning and end of timing and ...
Logging best practices [closed]
...owing specific codes.
e.g. The first digit can detail the general class: 1xxx can be used for 'Start' operations, 2xxx for normal behaviour, 3xxx for activity tracing, 4xxx for warnings, 5xxx for errors, 8xxx for 'Stop' operations, 9xxx for fatal errors, etc.
The second digit can detail the area, ...
How do I set the figure title and axes labels font size in Matplotlib?
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‘xx-small’, ‘x-small’, ‘small’, ‘medium’, ‘large’, ‘x-large’, ‘xx-large’. See matplotlib.org/api/…
– tsando
Oct 11 '17 at 8:37
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IRXmitter红外发射器扩展 · App Inventor 2 中文网
...）。
发生错误(错误信息)
扩展使用错误时发生错误的消息。没有用户可以响应的错误，因此错误通过中央错误事件触发。
使用示例
Metz电视遥控器
一个小示例应用展示了扩展的使用（参...
vertical divider between two columns in bootstrap
...s also have some problems...
When you try to be clever/lazy and use col-XX-X class together with hidden-XX/visible-XX classes inside the same row element.
When you have a lot of columns and need a pixel perfect thing. Since it moves n-1 column 1px to the left.
... But on the other hand it's res...
Hidden features of Scala
...
As a illustration of the use consider the following source:
class A { "xx".r }
Compiling this with scalac -Xprint:typer outputs:
package <empty> {
class A extends java.lang.Object with ScalaObject {
def this(): A = {
A.super.this();
()
};
scala.this.Predef.augm...
Why does Python print unicode characters when the default encoding is ASCII?
...ries.
UTF-8 encoding of unicode code points in the ascii range (0-127):
0xxx xxxx (in binary)
the x's show the actual space reserved to "store" the code point during encoding
The leading 0 is a flag that indicates to the UTF-8 decoder that this code point will only require 1 byte.
upon encod...
nginx error “conflicting server name” ignored [closed]
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You have another server_name ec2-xx-xx-xxx-xxx.us-west-1.compute.amazonaws.com somewhere in the config.
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