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AES Encryption for an NSString on the iPhone
...ret = @"text to encrypt";
NSData *plain = [secret dataUsingEncoding:NSUTF8StringEncoding];
NSData *cipher = [plain AES256EncryptWithKey:key];
printf("%s\n", [[cipher description] UTF8String]);
plain = [cipher AES256DecryptWithKey:key];
printf("%s\n", [[plain description] UTF8St...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...语句提供了一种非常方便的处理方式。一个很好的例子是文件处理，你需要获取一个文件句柄，从文件中读取数据，然后关闭文件句柄。 Without the with statement, one would write something along the lines of: 如果不用with语句，代码如下：
f...
Read only the first line of a file?
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In Python 3 if the file is ascii or utf8 you don't have to specify the file encoding. And if it is not you should specify the encoding to codecs.open in Python 2 anyway.
– Evpok
Jul 19 '12 at 12:15
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How do I provide custom cast support for my class?
...ext, "world");
// Create EncodedString from System.String but use UTF8 which takes 1 byte per char for simple English text
var encodedStr = EncodedString.FromString(text, Encoding.UTF8);
var fileName = Path.GetTempFileName();
// Implicit conversion EncodedString --&...
UCenter实现各系统通信的原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...nter实现各系统通信的原理
1、用户登录bbs，通过logging.php文件中，使用函数uc_user_login验证，如果验证成功，将调用函数uc_user_synlogin（位于uc_client下的client.php文件中）， 在这个函数中调用 uc_api_post('user', 'synlogin', array('uid'=>$uid));...
Make a float only show two decimal places
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you need this float numTwoDecimalDigits = atof([s UTF8String]);
– loretoparisi
Nov 10 '13 at 19:00
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How to convert a string to utf-8 in Python
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,I am getting the following error: UnicodeDecodeError: 'utf8' codec can't decode byte 0xb0 in position 2: invalid start byte This is my code: ret=[] for line in csvReader: cline=[] for elm in line: unicodestr = unicode(elm, 'utf-8') ...
SSL certificate rejected trying to access GitHub over HTTPS behind firewall
...~/.ssh/id_rsa and cloning using git clone git@ssh.github.com:oharab/log4vba.git got it up and running in no time.
– oharab
Jul 14 '11 at 13:39
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PostgreSQL error 'Could not connect to server: No such file or directory'
... pg gem:*
$ brew install postgresql
$ initdb /usr/local/var/postgres -E utf8
To have launchd start postgresql at login run:
$ ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
Or start manually.
Install pg gem
$ gem install pg
I hope have helped
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OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...后，使用客户端怎么都登录不上去
一开始以为是配置文件的问题，把另外一台没升级过的配置文件sshd_config拷贝到本机，不行
寄出百度 http://bbs.51cto.com/thread-1098820-1.html
按照这个说法
修改配置文件后，发现还是不行...