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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
...
);
(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
)...
水果vs蔬菜智能分类器 - EdgeML图像识别项目 · App Inventor 2 中文网
...术的优势包括：
隐私保护: 数据不需要上传到云端
低延迟: 本地处理，响应速度快
离线可用: 不需要网络连接
成本效益: 减少云端计算成本
开发环境准备
必需组件
PersonalImageClassifi...
Collisions when generating UUIDs in JavaScript?
...
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.
...
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 ...
How can one print a size_t variable portably using the printf family?
...u\n", x); // prints as unsigned decimal
printf("%zx\n", x); // prints as hex
printf("%zd\n", y); // prints as signed decimal
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Creating Unicode character from its number
...emember that the escape sequences in Java source code (the \u bits) are in HEX, so if you're trying to reproduce an escape sequence, you'll need something like int c = 0x2202.
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What is the difference between UTF-8 and Unicode?
...0xxxxxxx 7 007F hex (127)
110xxxxx 10xxxxxx (5+6)=11 07FF hex (2047)
1110xxxx 10xxxxxx 10xxxxxx (4+6+6)=16 FFFF hex (65535)
11110xxx 10xxxxxx 10xxxxxx 10xxxx...