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How to make a background 20% transparent on Android
... ...
android:background="#CCFF0000" />
In the example, CC is the hexadecimal number for 255 * 0.8 = 204. Note that the first two hexadecimal digits are for the alpha channel. The format is #AARRGGBB, where AA is the alpha channel, RR is the red channel, GG is the green channel and BB is th...
Reminder - \r\n or \n\r?
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New line depends on your OS:
DOS & Windows: \r\n 0D0A (hex), 13,10 (decimal)
Unix & Mac OS X: \n, 0A, 10
Macintosh (OS 9): \r, 0D, 13
More details here: https://ccrma.stanford.edu/~craig/utility/flip/
When in doubt, use any freeware hex viewer/editor to see how a file enco...
How do you get a string from a MemoryStream?
...is can be a pitfall: It's not aware of byte order mark and might include a Hex 00 in the beginning of the string.00 3C 3F -> .<? in Hex Editor but in VS or Notepad++: <?. So you can't see the difference even if you compare the strings by eye, only a comparison tool or Hex editor will show t...
ActionBar text color
...tString(R.string.app_name) + "</font>"));
You can also use the red hex code #FF0000 instead of the word red. If you are having trouble with this, see Android Html.fromHtml(String) doesn't work for <font color='#'>text</font>.
Additionally, if you want to use a color resource, ...
How to generate random SHA1 hash to use as ID in node.js?
...oString();
crypto.createHash('sha1').update(current_date + random).digest('hex');
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Quickest way to convert a base 10 number to any base in .NET?
... binary = IntToString(42, new char[] { '0', '1' });
// convert to hexadecimal
string hex = IntToString(42,
new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'});
// convert to hexavigesimal (base ...
CSS3 Transparency + Gradient
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);
(src)
Apparently you can even do this in IE, using an odd "extended hex" syntax. The first pair (in the example 55) refers to the level of opacity:
/* approximately a 33% opacity on blue */
filter: progid:DXImageTransform.Microsoft.gradient(
startColorstr=#550000FF, endColorstr=#550000FF
)...
Collisions when generating UUIDs in JavaScript?
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node-uuid has a test harness that you can use to test the distribution of hex digits in that code. If that looks okay then it's not Math.random(), so then try substituting the UUID implementation you're using into the uuid() method there and see if you still get good results.
[Update: Just saw Ve...
What is the difference between encode/decode?
...somecodec) is meaningful for these values of somecodec:
base64
bz2
zlib
hex
quopri
rot13
string_escape
uu
I am not sure what decoding an already decoded unicode text is good for. Trying that with any encoding seems to always try to encode with the system's default encoding first.
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How to properly add cross-site request forgery (CSRF) token using PHP
...ion_start();
if (empty($_SESSION['token'])) {
$_SESSION['token'] = bin2hex(random_bytes(32));
}
$token = $_SESSION['token'];
Sidenote: One of my employer's open source projects is an initiative to backport random_bytes() and random_int() into PHP 5 projects. It's MIT licensed and available on ...