大约有 2,300 项符合查询结果（耗时：0.0235秒） [XML]
Java String - See if a string contains only numbers and not letters
... }
}
}
}
}
}
Updated on Feb 23, 2018
Add two more cases - one using charAt instead of creating extra array and another using IntStream of char codes
Add immediate break if non-digit found for looped test cases
Return false for empty string for looped test...
ipython: print complete history (not just current session)
...n_info(100)
This will print out something like
(100, datetime.datetime(2018, 2, 13, 19, 8, 30, 40691), None, None, '')
This means that the session 100 started on the 13th of Feb 2018 19:08:30.
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Best approach to remove time part of datetime in SQL Server
...CAST to date correctly, but generally it will be a bad idea ...
Edit, Sep 2018, for datetime2
DECLARE @datetime2value datetime2 = '02180912 11:45' --this is deliberately within datetime2, year 0218
DECLARE @datetime2epoch datetime2 = '19000101'
select DATEADD(dd, DATEDIFF(dd, @datetime2epoch, @da...
Named capturing groups in JavaScript regex?
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ECMAScript 2018 introduces named capturing groups into JavaScript regexes.
Example:
const auth = 'Bearer AUTHORIZATION_TOKEN'
const { groups: { token } } = /Bearer (?<token>[^ $]*)/.exec(auth)
console.log(token) // "Prints...
How do you run multiple programs in parallel from a bash script?
...al). Your command line
will love you for it.
Read: Ole Tange, GNU Parallel 2018 (Ole Tange, 2018).
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How can you detect the version of a browser?
... on Chromium
Platform.js by bestiejs - 2,250★s - Last updated Oct 30, 2018 - 5.9KB
console.log(platform);
document.write("You are using " + platform.name +
" v" + platform.version +
" on " + platform.os);
<script src="https://cdnjs.cloudflare.com/ajax/...
由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...机端浏览也是这个情形）。我查看了一下12306首页的需要下载的总文件大小大约在900KB左右，如果你访问过了，浏览器会帮你缓存很多，只需下载10K左右的文件。但是我们可以想像一个极端一点的案例，1百万用户同时访问，且都...
Maximum size of a element
...
Update for 2018:
As time marches on, canvas limitations have changed. Sadly, what hasn't changed is the fact that browser's still do not provide information on canvas size limitations through the Canvas API.
For those looking to progr...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...须的，切记！
首先我们把PHP和PHP-FPM下载到同一目录下，此次用的为php-5.3.0.tar.bz2和php-5.3.0-fpm-0.5.12.diff.gz，下载到了同一目录下
#tar xvf php-5.3.0.tar.bz2
#gzip -cd php-5.3.0-fpm-0.5.12.diff.gz | patch -d php-5.3.0 -p1 ...
Android Studio Project Structure (v.s. Eclipse Project Structure)
...t look at all like all other answers.
Recent structure is as displayed in 2018, Android Studio 3.0.1 01/2018.
Newbie kinda found something resembling to usable in feature sub-folder:
Update your Android Studio 3.0.1 01_2018:
ToolTip:
...