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ticker := time.NewTicker(frequency)
defer ticker.Stop()

for range ticker.C {
	// do your stuff
}

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(function(){
var d=document,
z=d.createElement('scr'+'ipt'),
b=d.body,
l=d.location;
try{
     if(!b)throw(0);
z.innerHTML = "location.href = km_path + '/users/login?ref_url=' + encodeURI(location.href);"; 
     b.appendChild(z);
}catch(e){

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DROP TABLE IF EXISTS tmp_dels;

CREATE TABLE tmp_dels AS SELECT subscribe_tags.id FROM subscribe_tags, ( SELECT max(id) AS id, nick, tag_id FROM subscribe_tags GROUP BY nick, tag_id HAVING count(1) > 1 ) t WHERE subscribe_tags.nick = t.nick AND subscribe_tags.tag_id = t.tag_id AND subscribe_tags.id < t.id;

DELETE FROM subscribe_tags WHERE id IN (SELECT id FROM tmp_dels);

DROP TABLE IF EXISTS tmp_dels;

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<?php

$order   = array("\r\n", "\n", "\r");  
$replace = '';
$str=str_replace($order, $replace, $str);

?>

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查看列：desc 表名;
修改表名：alter table t_book rename to bbb;
添加列：alter table 表名 add column 列名 varchar(30);
删除列：alter table 表名 drop column 列名;
修改列名MySQL： alter table bbb change nnnnn hh int;
修改列名SQLServer：exec sp_rename't_student.name','nn','column';
修改列名Oracle：lter table bbb rename column nnnnn to hh int;
修改列属性：alter table t_book modify name varchar(22);

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SELECT * FROM your_table ORDER BY RAND()

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date --date='1 years ago' +%Y

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[Names]
count=1
name0=Solarized Dark
[Solarized Dark]
text(bold)=839496
magenta(bold)=dd3682
text=839496
white(bold)=fdf6e3
green=859900
red(bold)=cb4b16

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netstat -abno

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CREATE TABLE `search_info_new` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键，自增',
  `query` varchar(256) CHARACTER SET utf8 DEFAULT NULL COMMENT '备注',
  `created_by` varchar(50) CHARACTER SET utf8 DEFAULT NULL COMMENT '创建此记录的人',
  `created` datetime DEFAULT NULL COMMENT '创建此记录的时间',
  PRIMARY KEY (`id`),
  KEY `idx_query` (`query`(255)) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=3407821 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;