- 谷歌Android:
1google-chrome --user-agent="Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1"
- 苹果iPhone:
1google-chrome --user-agent="Mozilla/5.0 (iPad; U; CPU OS 3_2_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B500 Safari/531.21.10"
- 诺基亚N97:
1google-chrome --user-agent="Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/20.0.019; Profile/MIDP-2.1 Configuration/CLDC-1.1) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.18124"
Monthly Archive for September, 2010
1 2 3 4 5 6 7 8 9 10 11 12 | class Message: def __init__(self, aString): self.text = aString def printIt(self): print self.text m1 = Message("Hello world") m2 = Message("So long, it was short but sweet") note = [m1, m2] # put the objects in a list for msg in note: msg.printIt() # print each message in turn |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | <script type="text/javascript"> $(document).ready(function(){ $("#post-button").click(function(){ postcomment(); } ); }); function postcomment() { $.ajax({ type: "POST", url: "<?php echo $this->createUrl('game/play/post_comment') ?>", data: "content="+$("#comment-content").val(), success: function(msg){ //提交成功后的回调,msg变量是ok.php输出的内容。 alert("数据提交成功"); //如果有必要,可以把msg变量的值显示到某个DIV元素中 } }); } |
终于可以在GOOGLE MAP上看清晰看到川农的地图了,可惜不是2001时候那几年的样子了。还是可以怀念一下。We love google map.
View 四川农业大学 in a larger map
为了给高并发情况下的mysql进行更好的优化,有必要了解一下mysql查询更新时的锁表机制。
一、概述
MySQL有三种锁的级别:页级、表级、行级。
MyISAM和MEMORY存储引擎采用的是表级锁(table-level locking);BDB存储引擎采用的是页面锁(page-level
locking),但也支持表级锁;InnoDB存储引擎既支持行级锁(row-level locking),也支持表级锁,但默认情况下是采用行级锁。
Continue reading ‘MySQL锁表机制分析’
在复杂的商业社会,你想创业,不懂经济,不懂商业,不懂人情世故,不懂法律边沿,你只有勇气,只有梦想,只有天真,只有一场空。
这20部电影可以学到的商业社会必须的经济常识,以及每天都发生着的经济欺诈。 这20部电影都是英语(论坛)国家孩子在学习商业知识方面必须看的影片。其中包括哈佛商学院一直排第一位的Wall Street,还有沃顿商学院排第一位的Trading Place,以及斯坦福要求商科学生必须看的Boiler Room。 Continue reading ‘哈佛商学院和斯坦福要求学生必看的20部电影’
A friend of mine requested that i make a simple yet cool Vista style button tutorial for gimp, so here is what i came up with.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | [mysqld] user=mysql bind-address=127.0.0.1 datadir=/var/lib/mysql pid-file=/var/run/mysqld/mysqld.pid socket=/var/run/mysql/mysql.sock port=3306 tmpdir=/tmp language=/usr/share/mysql/english skip-external-locking query_cache_limit=64M query_cache_size=32M query_cache_type=1 max_connections=15 max_user_connections=300 interactive_timeout=100 wait_timeout=100 connect_timeout=10 thread_stack=128K thread_cache_size=128 myisam-recover=BACKUP key_buffer=64M join_buffer=1M max_allowed_packet=32M table_cache=512M sort_buffer_size=1M read_buffer_size=1M read_rnd_buffer_size=768K max_connect_errors=10 thread_concurrency=4 myisam_sort_buffer_size=32M skip-locking skip-bdb expire_logs_days=10 max_binlog_size=100M server-id=1 [mysql.server] user=mysql basedir=/usr [safe_mysqld] bind-address=127.0.0.1 err-log=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid open_files_limit=8192 SAFE_MYSQLD_OPTIONS=”–defaults-file=/etc/my.cnf –log-slow-queries=/var/log/slow-queries.log” [mysql] [isamchk] key_buffer=64M sort_buffer=64M read_buffer=16M write_buffer=16M [myisamchk] key_buffer=64M sort_buffer=64M read_buffer=16M write_buffer=16M [mysqlhotcopy] interactive-timeout max_heap_table_size = 64 M tmp_table_size = 64 M !includedir /etc/mysql/conf.d/ |
RAND() 函数是 MySQL 提供的产生随机数的函数。没有指定参数时,每次执行会返回 0-1 的浮点数:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | mysql> select rand(); +------------------+ | rand() | +------------------+ | 0.56110724207117 | +------------------+ 1 row in set (0.02 sec) mysql> select rand(); +-----------------+ | rand() | +-----------------+ | 0.3343874880433 | +-----------------+ 1 row in set (0.00 sec) |

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