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Fundamental difference between Hashing and Encryption algorithms
...ou're using HMAC, you sign a piece of data by taking a hash of the data concatenated with a known but not transmitted value (a secret value). So, you send the plain-text and the HMAC hash. Then, the receiver simply hashes the submitted data with the known value and checks to see if it matches the ...
C++ equivalent of java's instanceof
...
I would catch both at IOException level if they do not need to be handled diffently. If they need to be handled diffently, then I would add a catch block for each exception.
– mslot
Aug 12 '13 a...
How to write a scalable Tcp/Ip based server
... am in the design phase of writing a new Windows Service application that accepts TCP/IP connections for long running connections (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
...
Checkout another branch when there are uncommitted changes on the current branch
...times, and not other times?
The rule here is simple in one way, and complicated/hard-to-explain in another:
You may switch branches with uncommitted changes in the work-tree if and only if said switching does not require clobbering those changes.
That is—and please note that this is still simpl...
Create an index on a huge MySQL production table without table locking
...o="" where id = 41225\G'>/dev/null) 2>&1 | grep real;
done
) | cat -n &
PID=$!
sleep 0.05
echo "Index Update - START"
mysql -uroot website_development -e 'alter table users add index ddopsonfu (last_name, email, first_name, confirmation_token, current_sign_in_ip);'
echo "Index Update...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...ead_mutex_unlock(l)
#endif
测试代码如下：
/*
* benchmark.cc
*
* Created on: Aug 19, 2021
* Author: root
*/
#include "utility/TestCommand.h"
#include "tlsf.h"
#include <benchmark/benchmark.h>
void std_test() {
void* p = malloc(1024);
*(int*)p = 2134;
free...
Android studio: new project vs new module
...workspace". When creating a Module, two o the types offered are 1) application module and 2) android library module. #1 seems redundant to "new project" and #1 and #2 seem the same.
– user1679130
May 7 '15 at 19:59
...
NOT using repository pattern, use the ORM as is (EF)
... What is lacking however is the realization that LINQ strewn about an application instead of constrained to a consistent location creates the EF equivalent of SQL calls in codebehind pages. Every LINQ query is a potential maintenance point in an application, and the more there are (and the more wid...
Why does modern Perl avoid UTF-8 by default?
...latin,greek or some such. See uninames and tcgrep.
You almost always need access to the functions from the standard Unicode::Normalize module various types of decompositions. export PERL5OPTS=-MUnicode::Normalize=NFD,NFKD,NFC,NFKD, and then always run incoming stuff through NFD and outbound stuff f...
Using git repository as a database backend
...g a project that deals with structured document database. I have a tree of categories (~1000 categories, up to ~50 categories on each level), each category contains several thousands (up to, say, ~10000) of structured documents. Each document is several kilobytes of data in some structured form (I'd...