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RegEx to parse or validate Base64 data
Is it possible to use a RegEx to validate, or sanitize Base64 data? That's the simple question, but the factors that drive this question are what make it difficult.
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The most efficient way to implement an integer based power function pow(int, int)
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Exponentiation by squaring.
int ipow(int base, int exp)
{
int result = 1;
for (;;)
{
if (exp & 1)
result *= base;
exp >>= 1;
if (!exp)
break;
base *= base;
}
return result;
}
Th...
What is the effect of encoding an image in base64?
If I convert an image (jpg or png) to base64, then will it be bigger, or will it have the same size? How much greater will it be?
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Calling virtual functions inside constructors
...om derived classes hasn’t yet happened. Objects are constructed from the base up, “base before derived”.
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Destruction is done “derived class before base class”, so virtual functions behave as in constructors: Only the local definitions are used – and no calls are made to overriding ...
Why does a base64 encoded string have an = sign at the end
I know what base64 encoding is and how to calculate base64 encoding in C#, however I have seen several times that when I convert a string into base64, there is an = at the end.
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Http Basic Authentication in Java using HttpClient?
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Have you tried this (using HttpClient version 4):
String encoding = Base64Encoder.encode(user + ":" + pwd);
HttpPost httpPost = new HttpPost("http://host:post/test/login");
httpPost.setHeader(HttpHeaders.AUTHORIZATION, "Basic " + encoding);
System.out.println("executing request " + httpPost....
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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加密签名使用指导 · App Inventor 2 中文网
...数签名
案例三：AES 加密保存敏感数据
案例四：Base64 与 Basic 认证请求头
与服务器互通
Python 对应实现
Node.js 对应实现
常见问题
平台说明
完整 .aia 源码与操作指导 ...
How to solve error “Missing `secret_key_base` for 'production' environment” (Rails 4.1)
...icorn.log file I found this error message:
app error: Missing `secret_key_base` for 'production' environment, set this value in `config/secrets.yml` (RuntimeError)
After some research I found out that Rails 4.1 changed the way to manage the secret_key, so if you read the secrets.yml file located ...
C# 'is' operator performance
...he performance difference isn't worth considering the coding overhead.
My base and derived classes
class MyBaseClass
{
public enum ClassTypeEnum { A, B }
public ClassTypeEnum ClassType { get; protected set; }
}
class MyClassA : MyBaseClass
{
public MyClassA()
{
ClassType ...