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Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...因通常是開啟一個不具有開啟權限的檔案或socket。例如在UNIX上，一般的使用者不能開啟 SOCK_RAW的socket，通常是超級使用者(super user)才有此權限。如果一般的使用者企圖開啟SOCK_RAW的socket，將會得到這個錯誤訊息。
對於WinSock API...
How do I change the default port (9000) that Play uses when I execute the “run” command?
...bution:
sbt stage
For Play 2.0.x and 2.1.x use the target/start script (Unix Only):
target/start -Dhttp.port=8080
For Play 2.2.x & 2.3.x use the appropriate start script in the target/universal/stage/bin directory:
target/universal/stage/bin/[appname] -Dhttp.port=8080
With Play 2.2.x &a...
How can I iterate over files in a given directory?
... pathnames matching a specified pattern according to the rules used by the Unix shell, although results are returned in arbitrary order. No tilde expansion is done, but *, ?, and character ranges expressed with [] will be correctly matched.
...
How do I resolve ClassNotFoundException?
...tioned here:
on Windows
java -classpath .;yourjar.jar YourMainClass
on UNIX/Linux
java -classpath .:yourjar.jar YourMainClass
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How to recursively find the latest modified file in a directory?
... to keep everything in memory.
%T@ gives you the modification time like a unix timestamp, sort -n sorts numerically, tail -1 takes the last line (highest timestamp), cut -f2 -d" " cuts away the first field (the timestamp) from the output.
Edit: Just as -printf is probably GNU-only, ajreals usage o...
Tracking the script execution time in PHP
...
On unixoid systems (and in php 7+ on Windows as well), you can use getrusage, like:
// Script start
$rustart = getrusage();
// Code ...
// Script end
function rutime($ru, $rus, $index) {
return ($ru["ru_$index.tv_sec"]*10...
How to save a Python interactive session?
...
@ubershmekel - Looks like it only works on Unix
– Joel B
Feb 5 '15 at 15:04
30
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面部贴纸 · App Inventor 2 中文网
... ↗
代码技巧
4 项
摩尔斯电码制作电码谜题，并判断用户输入的答案是否正确。
↗
字...
App Inventor 2 PrivacyPolicyAI2Ext 拓展：隐私政策弹窗、隐私确认弹窗 ·...
...页面，比如：https://www.fun123.cn/static/privacy_policy.html，一个代码块搞定：
用户点击“同意”才能正常进入App，否则直接退出App。
用户同意之后，会记住这个状态，后续就不再弹窗提醒。App升级不会重置这个状态，只有在App卸...
Can you make valid Makefiles without tab characters?
...nswer.
You are not the first one to dislike this aspect of make. To quote Unix Haters' Handbook:
The problem with Dennis’s Makefile is that when he added the comment line, he inadvertently inserted a space before the tab character at the beginning of line 2. The tab character is a very import...