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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ing App Inventor extensions to implement multitouch: Rotation detector
A demo app with rotation detector extension component
How to build rotation detector extension
App Inventor does not have multitouch capabilities built in. Adding multitouch is a popular request, and MIT App Inventor might e...
What is uint_fast32_t and why should it be used instead of the regular int and uint32_t?
...so:
Exotic architectures the standards committees care about.
My opinion-based pragmatic view of integer types in C and C++.
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Turn a simple socket into an SSL socket
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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When to use NSInteger vs. int
...lve this case by using the type NSInteger which serves as an int or a long based on the compile/runtime environemnt.
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Decoding and verifying JWT token using System.IdentityModel.Tokens.Jwt
...rity tokens.
The class has a ReadToken(String) method that will take your base64 encoded JWT string and returns a SecurityToken which represents the JWT.
The SecurityTokenHandler also has a ValidateToken(SecurityToken) method which takes your SecurityToken and creates a ReadOnlyCollection<Claim...
Are types like uint32, int32, uint64, int64 defined in any stdlib header?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Convert seconds to Hour:Minute:Second
... 8525;
echo gmdate('H:i:s', $seconds);
# 02:22:05
See: gmdate()
Run the Demo
Convert seconds to format by 'foot' no limit* :
$seconds = 8525;
$H = floor($seconds / 3600);
$i = ($seconds / 60) % 60;
$s = $seconds % 60;
echo sprintf("%02d:%02d:%02d", $H, $i, $s);
# 02:22:05
See: floor(), spri...
How to hash some string with sha256 in Java?
...binary data, and if you want to represent that in a string, you should use base64 or hex... don't try to use the String(byte[], String) constructor.
e.g.
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] hash = digest.digest(text.getBytes(StandardCharsets.UTF_8));
...
Secure random token in Node.js
...e method crypto.randomBytes that generates a random Buffer. However, the base64 encoding in node is not url-safe, it includes / and + instead of - and _ . Therefore, the easiest way to generate such token I've found is
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Code for decoding/encoding a modified base64 URL
I want to base64 encode data to put it in a URL and then decode it within my HttpHandler.
5 Answers
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