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Prevent dialog dismissal on screen rotation in Android
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The best way to avoid this problem nowadays is by using a DialogFragment.
Create a new class which extends DialogFragment. Override onCreateDialog and return your old Dialog or an AlertDialog.
Then you can show it with DialogFragment.show(fragmentManager, ta...
Rotating videos with FFmpeg
...os with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (excellent library, btw) but I'm stuck on FFmpeg now.
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Fundamental difference between Hashing and Encryption algorithms
...tates from all these iterations back together to form the resultant hash.
Now, if you wanted to decode the hash, you'd first need to figure out how to split the given hash into its iterated states (1 possibility for inputs smaller than the size of a chunk of data, many for larger inputs). Then you...
How to create GUID / UUID?
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UUIDs (Universally Unique IDentifier), also known as GUIDs (Globally Unique IDentifier), according to RFC 4122, are identifiers designed to provide certain uniqueness guarantees.
While it is possible to implement an RFC-compliant UUIDs in a few lines of JS (E.g. see @b...
Datetime equal or greater than today in MySQL
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SELECT * FROM myTable WHERE DATE(myDate) = DATE(NOW())
Read more:
http://www.tomjepson.co.uk/tutorials/36/mysql-select-where-date-today.html
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Node.js: How to send headers with form data using request module?
... opaque: 'opaque',
logintype: '1'
};
var formData = querystring.stringify(form);
var contentLength = formData.length;
request({
headers: {
'Content-Length': contentLength,
'Content-Type': 'application/x-www-form-urlencoded'
},
uri: 'http://myUrl',
body: formData,
...
What does the “@” symbol do in Powershell?
...eck out Jeffrey Snover's answer below... @ is more than just an array identifier.
– Eric Schoonover
Sep 15 '09 at 6:47
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Difference between
...at you can only read from it and you'll get a T or subclass of T.
super
Now consider List <? super T>.
The wildcard declaration of List<? super Integer> foo3 means that any of these are legal assignments:
List<? super Integer> foo3 = new ArrayList<Integer>(); // Integer...
为AppInventor2开发自己的拓展(Extension) - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
来源中文网文档：https://www.fun123.cn/reference/extensions/aix_dev.html
为什么需要开发拓展？App Inventor 2 是积木式在线安卓开发环境，利用拖拽式的方式实现代码块堆叠，从而完成相应的逻辑。上手很容易，但是由于代码块提供的功能...
PHP: How to remove all non printable characters in a string?
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7 bit ASCII?
If your Tardis just landed in 1963, and you just want the 7 bit printable ASCII chars, you can rip out everything from 0-31 and 127-255 with this:
$string = preg_replace('/[\x00-\x1F\x7F-\xFF]/', '', $string);
It matches a...