大约有 610 项符合查询结果(耗时:0.0113秒) [XML]

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Fastest check if row exists in PostgreSQL

...mit it to 1 row. Should perform better. Have a look at edited answer from @aix for that. – Fabian Barney Sep 19 '11 at 13:44 add a comment  |  ...
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Bash Script : what does #!/bin/bash mean? [duplicate]

...both Ash & Dash have sh compatibility modes. If we delve into Solaris, Aix, HPUX, Ultrix, SCO etc. each will have their own default shell, which will have sh emulation (to remain POSIX compliant.) – ocodo Dec 14 '12 at 6:19 ...
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How do I determine the current operating system with Node.js

...indows, it returns win32 (even on 64 bit). Current possible values are: aix darwin freebsd linux openbsd sunos win32 I just set this at the top of my jakeFile: var isWin = process.platform === "win32"; share ...
https://www.tsingfun.com/it/bigdata_ai/635.html 

从网购到火车票,对比淘宝12306网为何如此烂? - 大数据 & AI - 清泛网 - ...

...级”还那么弱不禁风。 冯大辉的微博马上得到了@caoz的发响应,后者在9月底对12306的骂战中一战成名,由于观点相似,caoz和Fenng可以称为统一战线——当然,众多对12306充满怨恨的普通购票者也与他们在感情上统一战线。 简...
https://www.tsingfun.com/it/cpp/614.html 

浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

...255,所以 unsigned char 的范围为0~ 255,在这里普及一下2进制十进制的方法, 二进制每一位的数值乘以它的位权(2^(n-1),n为自右向左的位),再相加,可得到十进制数,比如 : 1111 1111 =1*2^7+1*2^6+1*2^5+1*2^4+1*2^3+1*2^2+1*2^1+1*2^0=127 。 但...
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How to get “wc -l” to print just the number of lines without file name?

... In AIX,ksh, this will always have a space preceeding the number. We have to use | awk '{print $1}' or a cut, to trim off the spaces. Another way to trim would be to enclose with an echo. – rao ...
https://www.tsingfun.com/ilife/tech/606.html 

融资千万美元后的足记要如何应对“爆款后遗症”? - 资讯 - 清泛网 - 专注C...

...露,光源资本是足记一直以来的财务顾问,此次是用佣金股的方式进入的。 “这个投资本来今年三月底就已经敲定了。但由于我们引入的是美元基金,手续比较长,比如建设海外VIE架构等,到公布前一周才完成大体的手续。...
https://www.tsingfun.com/ilife/tech/770.html 

半年报披露 天涯社区被资本方看空 - 资讯 - 清泛网 - 专注C/C++及内核技术

...015年半年度报告,自2015年9月1日起按照有关规定暂停股票让。但9月1日,天涯社区就披露了半年报告。这家受到高度关注的老牌互联网企业,在资本市场上,似乎还有很长的路要走。几乎没有一家公司像天涯社区一样得到如此...
https://bbs.tsingfun.com/thread-1383-1-1.html 

BLE(四)嗅探工具 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...进而确定“访问地址”、“循环冗余校验”初始值、“跳间隔”、“跳增量”等,并还原出数据包的值 缺点: 说是支持“传统蓝牙”,但其实只能捕获“基本速率蓝牙”在网络中的活动,并不支持后来的“增强速率蓝牙...
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How to mkdir only if a directory does not already exist?

I am writing a shell script to run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not exist, or suppress the "Fil...