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外媒评本轮科技泡沫：创业公司首当其冲 九成将消失 - 资讯 - 清泛网 - 专注...
...届时估计会有90%的创业公司不复存在。
北京时间6月29日消息，《华尔街日报》科技专栏作家克里斯托弗·米姆斯（Christopher Mims）今日撰文指出，科技行业目前正处于泡沫之中。由于创业公司可以更为轻松地从风投公司那里获得...
.Net HttpWebRequest.GetResponse() raises exception when http status code 400 (bad request) is return
...
@AnkushJain: I believe it will return normally for 2XX; redirection may happen for 3XX depending on configuration - I'd expect anything else to cause an exception, though I could be wrong. (For 4XX, it's just possible that it will then apply auth information if it has it but h...
What's an appropriate HTTP status code to return by a REST API service for a validation failure?
... High.
This is the generic client-side error status, used when no other 4xx error code is appropriate. It’s commonly used when the client submits a representation along with a
PUT or POST request, and the representation is in the right format, but it doesn’t make
any sense. (p. 381)
and:...
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”?
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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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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...
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 ...