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Two-way encryption: I need to store passwords that can be retrieved
...json).
After you have successfully encrypted using mcrypt, run it through base64_encode and then convert it to hex code. Once in hex code it's easy to transfer in a variety of ways.
$td = mcrypt_module_open('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RA...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...ain, but can be avoided by using dependency breaking idioms. In processors based on Intel Core micro-architecture, a number of instructions can help clear execution dependency when software uses these instruction to clear register content to zero. Break dependencies on portions of registers between ...
Maximum number of records in a MySQL database table
What is the upper limit of records for MySQL database table. I'm wondering about autoincrement field. What would happen if I add milions of records? How to handle this kind of situations?
Thx!
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Android OpenGL ES and 2D
...enGLE quick! It only took a few months and had a custom coordinate system based on the Cartesian coordinate system. I was able to render 3D object no camera using Augmented Reality techniques.
I started with only programming experience, with no OpenGL experience. I used Ray Wenderlich's tutori...
Could not load file or assembly Microsoft.SqlServer.management.sdk.sfc version 11.0.0.0
...ve installed MS SQL Server 2008 R2 and when I try to update model from database under EDMX file I am facing that error.
12 ...
how to use XPath with XDocument?
... 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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Failed to install Python Cryptography package with PIP and setup.py
... ships manylinux wheels. This means users with pip 8.1+ running on a glibc-based distribution (almost everything except Alpine Linux) and on x86/x86-64 no longer need a compiler or headers because you'll get a precompiled wheel automatically. With version 3.1 we now also ship aarch64 wheels (which r...
Objective-C and Swift URL encoding
...aractersInString:@" \"#%/:<>?@[\\]^`{|}"] invertedSet];
Creating a Base64
In the case of Base64 characterset:
NSCharacterSet *URLBase64CharacterSet = [[NSCharacterSet characterSetWithCharactersInString:@"/+=\n"] invertedSet];
For Swift 3.0:
var escapedString = originalString.addi...
libunwind链接时报错：undefined reference to `_Ux86_64_init_local\' - ...
libunwind链接时报错：undefined reference to `_Ux86_64_init_local'编译安装libunwind后，代码编译链接时报错：undefined reference to `_Ux86_64_init_local& 39;，链接选项加了 -lunwind，仍然报错。原因：编译出来的libunwind拆分成了很多个 编译安装libunwi...
sqlite database default time value 'now'
Is it possible in a sqlite database to craete a table that has a timestamp column that default to DATETIME('now') ?
7 Ans...