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When should I use Kruskal as opposed to Prim (and vice versa)?
...he net that explains the difference in a very straightforward way : http://www.thestudentroom.co.uk/showthread.php?t=232168.
Kruskal's algorithm will grow a solution from the cheapest edge by adding the next cheapest edge, provided that it doesn't create a cycle.
Prim's algorithm will grow a solu...
Two-way encryption: I need to store passwords that can be retrieved
...
The PHP function you are after is Mcrypt (http://www.php.net/manual/en/intro.mcrypt.php).
The example from the manual is slightly edited for this example):
<?php
$iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_R...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ogle i/o上的演讲《Transaction Across DataCenter》（视频： http://www.youtube.com/watch?v=srOgpXECblk）
前面，我们说过，要想让数据有高可用性，就需要冗余数据写多份。写多份的问题会带来一致性的问题，而一致性的问题又会带来性能问题...
What is the javascript MIME type for the type attribute of a script tag? [duplicate]
.../javascript. This appears in the HTML 4.0 specification, anyway.
http://www.w3.org/TR/REC-html40/interact/scripts.html
[EDIT] Funny how the RFC that standardized on application/javascript is 2 years old, but text/javascript is still more common. Is this yet another case of custom triumphing ove...
Can gcc output C code after preprocessing?
...ave to be 'cpp'.) There's an excellent description of this usage at http://www.cs.tut.fi/~jkorpela/html/cpre.html.
The "-traditional-cpp" preserves whitespace & tabs.
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continue processing php after sending http response
...nsiveCalulation = 1+1;
error_log($expensiveCalculation);
Source: https://www.php.net/manual/en/function.fastcgi-finish-request.php
PHP issue #68722: https://bugs.php.net/bug.php?id=68772
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What are “connecting characters” in Java identifiers?
...connecting characters. These are characters used to connect words.
http://www.fileformat.info/info/unicode/category/Pc/list.htm
U+005F _ LOW LINE
U+203F ‿ UNDERTIE
U+2040 ⁀ CHARACTER TIE
U+2054 ⁔ INVERTED UNDERTIE
U+FE33 ︳ PRESENTATION FORM FOR VERTICAL LOW LINE
U+FE34 ︴ PRESENTATION FOR...
I forgot the password I entered during postgres installation
...init.d/postgresql restart
Further Reading about that pg_hba file: http://www.postgresql.org/docs/9.1/static/auth-pg-hba-conf.html
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How can I create an object based on an interface file definition in TypeScript?
...was introduced for use in .tsx files
let a = {} as MyInterface;
https://www.typescriptlang.org/docs/handbook/jsx.html
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What is the good python3 equivalent for auto tuple unpacking in lambda?
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According to http://www.python.org/dev/peps/pep-3113/ tuple unpacking are gone, and 2to3 will translate them like so:
As tuple parameters are used by lambdas because of the single
expression limitation, they must also be supported. This is...