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Is it good practice to use java.lang.String.intern()?
...t uses 4-5x less memory than rolling your own object pool
Be sure to tune -XX:StringTableSize (the default is probably too small; set a Prime number)
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Allowed characters in Linux environment variable names
...you are using docker, you can set variable in Dockerfile
FROM busybox
ENV xx.f%^&*()$#ff=1234
Kubernetes configmap
If you are using kubernetes, you can set variable by ConfigMap
test.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: foo-config
data:
"xx.ff-bar": "1234"
---
apiVers...
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 "<...
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...
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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刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...O棋局与“一元年薪”并行的是京东43亿元入股永辉超市的消息，高价布局供应链的背后彰显着京东对O2O的野心。近日，京东公布了一项薪酬计划，该计划透露，未来十年，刘强东的年薪降至一元并推出股权激励计划，希望借此将...
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 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 ...
How do I set the figure title and axes labels font size in Matplotlib?
...
‘xx-small’, ‘x-small’, ‘small’, ‘medium’, ‘large’, ‘x-large’, ‘xx-large’. See matplotlib.org/api/…
– tsando
Oct 11 '17 at 8:37
...
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...