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新浪是如何分析处理32亿条实时日志的？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...帮倒忙。原因：Logstash默认自带的IP库是国外maxmind公司的免费版本，中国的信息尤其不准。解决方案：使用我浪较新较全的IP库生成能适配maxmind geoip2 api的二进制格式IP库（maxmindDB），再开发logstash-filter-geoip2来解析IP。实测不仅IP...
Restore file from old commit in git
....
Write down that long commit ID (e.g. b6b94f2c19c456336d60b9409fb1e373036d3d71) for the commit version you want.
git checkout b6b94f2c19c456336d60b9409fb1e373036d3d71 -- myfile.java
Pass the commit ID AND the file name you want to restore. Make sure you have a space before and after the double hyp...
Is it possible for git-merge to ignore line-ending differences?
...-u
100644 39b4c894078a02afb9b1dfeda6f1127c138e38df 1 a.txt
100644 28b3d018872c08b0696764118b76dd3d0b448fca 2 a.txt
100644 3994da66530b4df80189bb198dcfac9b8f2a7b33 3 a.txt
C:\HOMEWARE\git\test\test_merge>git mergetool
Merging the files: a.txt
Normal merge conflict for 'a.txt':
...
How to replace captured groups only?
...ew string, maintaining the text surrounding it.
– mix3d
Mar 29 '16 at 22:14
4
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FloatActionBtn 扩展：悬浮操作按钮扩展，可自定义颜色、大小、图标和位置 ...
...
FloatActionBtn 扩展
FloatActionBtn 是一个免费的悬浮操作按钮扩展，为 App Inventor 平台提供可定制的 Material Design 风格悬浮按钮。该扩展支持自定义 PNG 图标、默认加号图标、颜色、大小、位置、边距控制和触摸效...
How can I convert a PFX certificate file for use with Apache on a linux server?
...RIVATE KEY-----
MjQxODIwNTFaMIG0MRQwEgYDVQQKEwtFbnRydXN0Lm5ldDFAMD4GA1UECxQ3d3d3
LmVudHJ1c3QubmV0L0NQU18yMDQ4IGluY29ycC4gYnkgcmVmLiAobGltaXRzIGxp
YWIuKTElMCMGA1UECxMcKGMpIDE5OTkgRW50cnVzdC5uZXQgTGltaXRlZDEzMDEG
A1UEAxMqRW50cnVzdC5uZXQgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgKDIwNDgp
MIIBIjANBgkqhkiG9w0BAQEF...
记录一些Mac OS X技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的功能可以看演示视频。
此外，建议使用BetterTouchTool（免费下载，Mac App Store里收费）和Jitouch（收费）来增强功能。这2个软件各自有些独有的功能，所以最好都安装，只不过设置的时候比较头痛。
需要注意的是，使用这2个软...
20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...间活跃在系统上。
11. Monit — 程序和服务监测
这是一个免费的开源的基于 web 程序的自动监控和管理系统进程、程序、文件、目录、权限、校验文件系统。它监控的服务包括 Apache、MYSQL、Mail、FTP、Nginx 等等。系统状态是可以从...
How many bytes does one Unicode character take?
...89
U+1F4A9 PILE OF POO: ????
Nº: 128169
UTF-8: F0 9F 92 A9
UTF-16: D8 3D DC A9
U+1F680 ROCKET: ????
Nº: 128640
UTF-8: F0 9F 9A 80
UTF-16: D8 3D DE 80
Okay I'm getting carried away...
Fun facts:
If you're looking for a specific character, you can copy&paste it on http://codepoints....
Why does changing the sum order returns a different result?
...output is as follows:
403787ae147ae148: 23.53
4017851eb851eb85: 5.88
4031a3d70a3d70a4: 17.64
4047866666666666: 47.05
--------
403d68f5c28f5c29: 29.41
4047866666666666: 47.05
--------
404495c28f5c28f6: 41.17
4047866666666667: 47.050000000000004
The first 4 numbers are x, y, z, and s's hexadecimal ...