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Hash String via SHA-256 in Java
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@BrendanLong Now, How to retrieval digest to String again?
– Sajad
Oct 22 '13 at 19:22
1
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What is the best way to concatenate two vectors?
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@Gman: That's a fair point since we know that the source is also a vector (where iterator distance has O(1) complexity). Still, the performance guarantees of insert are something to be mindful of when you can often do better by planning ahead.
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Min/Max-value validators in asp.net mvc
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Great answer. I would modify the error message a bit: "Enter a value greater than or equal to " is a more (grammatically-speaking) correct error message.
– Tieson T.
Jul 26 '12 at 0:04
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How do I ignore files in Subversion?
...ectory.
svn status
> 0 unversioned files # ...but now the file is ignored!
cd subdirectory # now open a subdirectory.
echo "foo" > "ignoreThis.txt" # create another file named "ignoreThis.txt".
svn status
> ? ./subdirecto...
Manually raising (throwing) an exception in Python
... How do I manually throw/raise an exception in Python?
Use the most specific Exception constructor that semantically fits your issue.
Be specific in your message, e.g.:
raise ValueError('A very specific bad thing happened.')
Don't raise generic exceptions
Avoid raising a generic Exception....
#1071 - Specified key was too long; max key length is 1000 bytes
...suming that the strings are all present; that is, that they are all there. If some are null, it will throw off your calculations and underreport short strings. You want to use count([field_name]) instead of count(*).
– D Mac
Jun 17 '18 at 18:59
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python assert with and without parenthesis
...ing (SyntaxWarning: assertion is always true, perhaps remove parentheses?) if you ran it through a full interpreter, not through IDLE. Because assert is a keyword and not a function, you are actually passing in a tuple as the first argument and leaving off the second argument.
Recall that non-empt...
Can a C# lambda expression have more than one statement?
...Where(i =>
{
bool result;
if (i == "THIS")
result = true;
else if (i == "THAT")
result = true;
else
result = false;
return result;
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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...线程从缓冲区中取出消息
MessageBuffer.h
//MessageBuffer.h
#ifndef _MESSAGE_BUF_INCLUDE_
#define _MESSAGE_BUF_INCLUDE_
#include <pthread.h>
#define MESSAGE_COUNT 16
#define MESSAGE_LENGTH 2048
class MessageBuffer{
private:
pthread_mutex_t mutex;//访问缓冲的互斥量
pt...
How to put a delay on AngularJS instant search?
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UPDATE
Now it's easier than ever (Angular 1.3), just add a debounce option on the model.
<input type="text" ng-model="searchStr" ng-model-options="{debounce: 1000}">
Updated plunker:
http://plnkr.co/edit/4V13gK
Documentatio...