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Best way to simulate “group by” from bash?
...s main memory size. Don't underestimate the implementation quality of the Unix sort command. Sort was used to handle very large volumes of data (think the original AT&T's billing data) on machines with 128k (that's 131,072 bytes) of memory (PDP-11). When sort encounters more data than a prese...
大数据不是万能的 - 资讯 - 清泛网 - 专注C/C++及内核技术
...跟国际上(包括美国在内的各种市场)的差距。
我们先来分析中国信贷行为特别是小额领域里面的信贷行为，因为目前P2P总体来说是以小额信贷为主。
人民银行跟银监会发布的小额贷款报告提出，中国今天一万多家小额贷款公司...
how to prevent “directory already exists error” in a makefile when using mkdir
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On UNIX Just use this:
mkdir -p $(OBJDIR)
The -p option to mkdir prevents the error message if the directory exists.
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程序员保值的4个秘密 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...和一帮程序员在一起，你还和产品经理、UI设计师、业务分析师、项目经理等等在一起，如果你能融入团队，并且能影响、促进其他人为共同的目标做出有效的努力，那么，你这样的程序员，是无敌的，是国之瑰宝！
说了这...
How to interpret API documentation function parameters?
...syntaxdoc laying around anywhere, however there is a ~30 year old file for UNIX man page synposis format which is widespread use.
Some examples of this (and answering your question) would be :
Underlined words are considered literals, and are typed just as they appear.
Square brackets ( [] ) around...
How do you read from stdin?
...s
data = sys.stdin.readlines()
print "Counted", len(data), "lines."
On Unix, you could test it by doing something like:
% cat countlines.py | python countlines.py
Counted 3 lines.
On Windows or DOS, you'd do:
C:\> type countlines.py | python countlines.py
Counted 3 lines.
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Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine
...e.org/lang_datefunc.html) this text:
Compute the date and time given a unix
timestamp 1092941466, and compensate
for your local timezone.
SELECT datetime(1092941466, 'unixepoch', 'localtime');
That didn't look like it fit my needs, so I tried changing the "datetime" function around a bit...
Timing a command's execution in PowerShell
...races for simple commands, for example: "time ls", exactly as you would in Unix.
– Raúl Salinas-Monteagudo
May 22 '19 at 7:18
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Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...在这里就不细说了。
Dokan客户端则由Delphi开发，其参考代码来自网络上的Delphi例子，比如Mirror Driver。
本篇文章主要是Dokan开发过程的一些总结，所以不会对Dokan本身做介绍，与Dokan有关的资料及代码，请到google里搜索，或到Dokan...
VideoRecorder 拓展：前台预览录制 + 后台无预览录制，支持分辨率、码率设...
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在布局中显示摄像头实时画面，录制视频。
参考代码块：
BackgroundVideoRecorder — 后台模式（无预览）
无预览画面，应用最小化后录制继续。适合后台监控、静默录制等场景。
参考代码块：
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