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socket网络编程中read与recv区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...使是采用recv + WAITALL 参数还是要考虑是否需要循环读取的问题，在实验中对于多数情况下recv (使用了MSG_WAITALL)还是可以读完buff_size，所以相应的性能会比直接read 进行循环读要好一些。
2、read 与 recv函数调用
read(sockfd, ...
App Inventor 2 实现导出Excel全方案总结 · App Inventor 2 中文网
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App Inventor 2 OCR 图片文字识别全方案总结 · App Inventor 2 中文网
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App Inventor 2 TableView 拓展：TableView 拓展：数据表格视图，表格展示...
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App Inventor 2 TextboxUtil 扩展：消除输入框焦点（光标） · App Inventor 2 中文网
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Secure hash and salt for PHP passwords
It is currently said that MD5 is partially unsafe. Taking this into consideration, I'd like to know which mechanism to use for password protection.
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What is the string length of a GUID?
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Note: 36 is the string length with the dashes in between. They are actually 16-byte numbers.
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MySQL vs PostgreSQL for Web Applications [closed]
...on factor is, "which is faster?" Then the answer is "it depends. If it really matters, test your application against both." And if you really, really care, you get in two DBAs (one who specializes in each database) and get them to tune the crap out of the databases, and then choose. It's astonis...
What MySQL data type should be used for Latitude/Longitude with 8 decimal places?
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Additionally, you will see that float values are rounded.
// e.g: given values 41.0473112,29.0077011
float(11,7) | decimal(11,7)
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41.0473099 | 41.0473112
29.0077019 | 29.0077011
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