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前端加载超大图片(100M以上)实现秒开解决方案 - 知乎 https://zhuanlan.zhihu.com/p/615286222
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posted @ 2017-02-17 12:32
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posted @ 2017-02-17 12:20
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时间消耗 耗时 import timefrom datetime import datetimelimit_ms = 10000start = datetime.now()time.sleep(1.234)end = datetime.now()duration = end - startms =
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posted @ 2017-02-17 02:35
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使用 JavaScript,HTML 和 CSS 构建跨平台的桌面应用程序 流程模型 | Electron https://www.electronjs.org/zh/docs/latest/tutorial/process-model 流程模型 Electron 继承了来自 Chromium 的多
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posted @ 2017-02-17 01:01
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推荐算法架构 :召回(1) - 知乎 https://zhuanlan.zhihu.com/p/475120402 推荐算法架构 :召回(1) 召回模块面对几百上千万的推荐池物料规模,候选集十分庞大。由于后续有排序模块作为保障,故不需要十分准确,但必须保证不要遗漏和低延迟。目前主要通过多路召回来实现
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posted @ 2017-02-16 23:14
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Linux inotify功能及实现原理 https://mp.weixin.qq.com/s?src=11×tamp=1642038821&ver=3555&signature=L1s3NlAcI-rPNc-9ZZgBMdagfIIslFJVblDmz5lydogzw1fimX9Ij*k
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posted @ 2017-02-16 23:11
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posted @ 2017-02-16 22:49
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w 0-订单表为2张:非拼团、拼团; 1-拼团类型表,拼团维度:人数、周期、单品或组合、折扣; 评团创建表:上类型表共拼团创建人选择; 团成员表:上创建表中共新成员选择; 商品录入表:独立表,仅商品价格、名字、描述等基本信息。 顾客页面端需要3次join才能进行拼团信息的展示、参团、开团、下单,对其
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posted @ 2017-02-16 22:40
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实践: 1) 首先,可以先查看一下数据库现在的sql_mode的值,sql语句为: select version(), @@sql_mode; 获取结果可能如下,不同的设置查询出来的有区别: 然后可以使用如下语句,去设置自己需要的sql_mode. SET sql_mode=(SELECT REPL
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posted @ 2017-02-16 15:32
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https://docs.djangoproject.com/en/2.2/ref/contrib/ contrib packages Django aims to follow Python’s “batteries included” philosophy. It ships with a va
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posted @ 2017-02-16 14:06
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w数组的元素排序,不同编程语言的算法。 w耗时、耗内存。 情景: 一张grab表,行时时新增中;每次按一定条件取出一定行,遍历每行,对单表单行数据进行处理分析,分析后再更新是否分析二元值标识字段。 若采用外部脚本分析,如php,暂时不考虑存储过程,同时认为只有一个分析脚本在运行,无并发分析,则需要获
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posted @ 2017-02-16 13:11
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w TypeError : Cannot set property 'innerHTML' of nullTypeError : Cannot set property 'value' of null通过id或其他部分属性查找元素改变页面值时,如在点击中event.target.getAttribu
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posted @ 2017-02-15 13:44
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Python | super() function with multilevel inheritance - GeeksforGeeks https://www.geeksforgeeks.org/python-super-function-with-multilevel-inheritance/
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posted @ 2017-02-14 17:50
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https://docs.djangoproject.com/en/2.2/topics/pagination/ Paginator objects¶ The Paginator class has this constructor: class Paginator(object_list, per
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posted @ 2017-02-14 17:42
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http://www.world-english.org/boys_names-j-l.htm w http://ename.dict.cn/list/male/F/4 http://babynames.net/all/starts-with/d?page=2
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posted @ 2017-02-14 15:51
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w HTTP The Definitive Guide Cookies themselves are not believed to be a tremendous security risk, because they can be disabled and because much of the
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posted @ 2017-02-14 11:31
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w HTTP The Definitive Guide 11.6.9 Cookies and Caching You have to be careful when caching documents that are involved with cookie transactions. You d
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posted @ 2017-02-14 11:29
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w HTTP The Definitive Guide Cookies can be used to track users as they make multiple transactions to a web site. E-commerce web sites use session cook
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posted @ 2017-02-14 11:26
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w https://www.zhihu.com/question/35307626 w 0-客户端(附加用户信息)首次请求服务端 》服务端生成session(有唯一性)、session_id,cookie(可能含有用户名、登录密码、浏览历史),并且设定cookie的生命周期、适用域名、适用域名下的路
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posted @ 2017-02-14 11:20
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HTTP The Definitive Guide Cookies are the best current way to identify users and allow persistent sessions. They don't suffer many of the problems of
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posted @ 2017-02-14 11:16
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w本地存储数据2种形式。 http://superuser.com/questions/292952/chrome-cookies-folder-in-windows-7 chrome://settings/cookies Settings > Show Advanced Settings > Pr
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posted @ 2017-02-14 10:54
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w在每个URL后面都附加一个用户特有的标识码。 HTTP The Definitive Guide Some web sites keep track of user identity by generating special versions of each URL for each user.
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posted @ 2017-02-14 10:40
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w用HTTP认证首部注册用户名。 HTTP The Definitive Guide Rather than passively trying to guess the identity of a user from his IP address, a web server can explicit
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posted @ 2017-02-14 10:36
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HTTP The Definitive Guide Early web pioneers tried using the IP address of the client as a form of identification. This scheme works if each user has
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posted @ 2017-02-14 10:31
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用户信息通过HTTP头部承载:不能实现用户唯一性标识。 w HTTP The Definitive Guide Table 11-1 shows the seven HTTP request headers that most commonly carry information about the
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posted @ 2017-02-14 10:27
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w服务器要知道和谁在交谈。 HTTP The Definitive Guide Web servers may talk to thousands of different clients simultaneously. These servers often need to keep track
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posted @ 2017-02-14 10:04
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0-服务器识别用户的目的:服务器存有不同用户的信息,而对这些信息,服务器自身、网站开发管理者、网站访问者会对其读写; 1-暂且存入服务器数据库,购物车分为2种表:购物车入车表和购物车下单表; 2-单个客户的购物车是只有一个,状态具有单一时刻,或者说,当前唯一性,其中入车表一个客户的一种商品数量大于1
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posted @ 2017-02-14 09:59
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posted @ 2017-02-14 01:23
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w调用函数次数的计算。 JavaScript: The Good Parts 4.15. Memoization Functions can use objects to remember the results of previous operations, making it possible
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posted @ 2017-02-14 00:10
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posted @ 2017-02-13 18:08
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posted @ 2017-02-13 16:47
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借助cookie,cookie是js和php互相传值的纽带。
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posted @ 2017-02-13 16:29
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posted @ 2017-02-13 12:32
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http://stackoverflow.com/questions/143847/best-way-to-find-if-an-item-is-in-a-javascript-array Best way to find if an item is in a JavaScript array? [
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posted @ 2017-02-13 11:49
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w 将数据库的不同数值寄存到自定义的不同属性上,避免通过寄存到同一id属性上的字符串处理。
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posted @ 2017-02-13 11:46
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HTTP: The Definitive Guide 17.3.2 Content-Negotiation Header Quality Values The HTTP protocol defines quality values to allow clients to list multiple
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posted @ 2017-02-13 11:28
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w交给客户端浏览器js处理,减少向服务器的提交字节、精简处理逻辑。
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posted @ 2017-02-13 09:54
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w拼写多一个空格导致。 http://stackoverflow.com/questions/16100543/uncaught-typeerror-cannot-set-property-value-of-null
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posted @ 2017-02-13 09:51
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w作用域控制变量的可见范围。 JavaScript: The Good Parts Instead of initializing myObject with an object literal, we will initialize myObject by calling a function t
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posted @ 2017-02-12 23:35
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w单图,绕开了显示的兼容性。 http://res.m.suning.com/project/JoinGo/intro.html http://res.m.suning.com/project/JoinGo/assets/images/group/fullpage.png http://res.su
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posted @ 2017-02-12 19:16
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