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What does “program to interfaces, not implementations” mean?
...erfaces, which can be found also in languages without inheritance (Go from Google).
– Gabriel Ščerbák
Apr 23 '10 at 11:01
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
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cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器建立mongos 、config 、 shard1 、shard2、shard3 五个目录。...
Highlight all occurrence of a selected word?
...uestion, but if someone is interested in this feature, can check this code
http://vim.wikia.com/wiki/Auto_highlight_current_word_when_idle
" Highlight all instances of word under cursor, when idle.
" Useful when studying strange source code.
" Type z/ to toggle highlighting on/off.
nnoremap z/ :if ...
Seedable JavaScript random number generator
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One option is http://davidbau.com/seedrandom which is a seedable RC4-based Math.random() drop-in replacement with nice properties.
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Freeing up a TCP/IP port?
... fuser(1) command. For example, to see all of the processes listening for http requests on port 80 (run as root or use sudo):
# fuser 80/tcp
If you want to kill them, then just add the -k option.
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Objective-C formatting string for boolean?
...s for use with NSLog and [NSString stringWithFormat] are documented here:
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html
BOOL/bool/boolean are not even mentioned...
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Check orientation on Android phone
... on some devices you will get it wrong. We used that approach initially in http://apphance.com. Thanks to remote logging of Apphance we could see it on different devices and we saw that fragmentation plays its role here.
I saw weird cases: for example alternating portrait and square(?!) on HTC Desi...
PHP code to convert a MySQL query to CSV [closed]
...S TERMINATED BY "\n"
FROM my_table;
(the documentation for this is here: http://dev.mysql.com/doc/refman/5.0/en/select.html)
or:
$select = "SELECT * FROM table_name";
$export = mysql_query ( $select ) or die ( "Sql error : " . mysql_error( ) );
$fields = mysql_num_fields ( $export );
for ( $i...
Vim search and replace selected text
...eful to copying strings from the file to the search tool
" Based on this - http://peterodding.com/code/vim/profile/autoload/xolox/escape.vim
function! EscapeString (string)
let string=a:string
" Escape regex characters
let string = escape(string, '^$.*\/~[]')
" Escape the line endings
let ...
Make body have 100% of the browser height
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Setting body {min-height:100%} will give you scroll bars.
See demo at http://jsbin.com/aCaDahEK/2/edit?html,output .
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