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What's the meaning of the PHP token name T_PAAMAYIM_NEKUDOTAYIM? [duplicate]

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问题 This question already has answers here : PHP expects T_PAAMAYIM_NEKUDOTAYIM? (8 answers) Closed 3 years ago . What's the story behind the :: 's sometimes token name T_PAAMAYIM_NEKUDOTAYIM I'm mainly interested in knowing if This is an abbreviation for something else. This is a phrase in a language other than English, and if so what's the language and what's a rough translation. This is some obscure-to-me programming term. Drunk developers. 回答1: From the PHP docs: Paamayim Nekudotayim would,

What does exclamation point stand for in HTML in constructs like DOCTYPE and comments?

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I am curious about the syntax of the doctype and comment tags... Why the exclamation point? What is it called, what does it mean/do? I have read through the HTML syntax spec and found no real explanation other than Any case-insensitive match for the string <!DOCTYPE . Cite: http://www.w3.org/TR/html-markup/syntax.html#doctype-syntax In SGML, which is what HTML was nominally based on, up to and including HTML 4.01, the exclamation mark is part of the construct <! , which is the reference concrete syntax for mdo, markup declaration open. Markup declarations are not markup elements but,

JS History

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JS History window.history 对象包含浏览器的历史。 Window History window.history 对象在编写时可不使用 window 这个前缀。为了保护用户隐私，对 JavaScript 访问该对象的方法做出了限制。一些方法： history.back() - 与在浏览器点击后退按钮相同 history.forward() - 与在浏览器中点击按钮向前相同 Window History Back history.back() 方法加载历史列表中的前一个 URL。这与在浏览器中点击后退按钮是相同的：在页面上创建后退按钮： <html> <head> <script> function goBack() { window.history.back() } </script> </head> <body> <input type="button" value="Back" onclick="goBack()"> </body> </html> Window History Forward history forward() 方法加载历史列表中的下一个 URL。这与在浏览器中点击前进按钮是相同的：在页面上创建一个向前的按钮： <html> <head> <script> function goForward() { window

Moving files lose history in TFS 2013

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I'm using VS2013 Update 4 with TFS 2013 Update 4. In Source Control Explorer, whenever I move a file from one folder to another I can see that the file's history is preserved in the new location. However, that history is gone when I check-in the pending changes. The same thing happens when I try to run "tf move" command. So, how can you move a file in TFS and still keep the file's history? When a file is renamed correctly, the History is not "Gone", it's associated to the "old name" instead. A rename that is done the right way (tracked as a rename and not as an delete+add) has a drilldown

Vue-Router中History模式

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目录 history路由官方示例 Express中间件客户端兜底404 示例代码托管在： http://www.github.com/dashnowords/blogs 博客园地址：《大史住在大前端》原创博文目录华为云社区地址：【你要的前端打怪升级指南】 history路由 history 模式是指使用HTML5的 historyAPI 实现客户端路由的模式，它的典型表现就是去除了 hash 模式中url路径中的 # 。对于前端路由基本原理还不了解的读者可以看这篇博文【javascript基础修炼(6)——前端路由的基本原理】。在使用 Vue-Router 时开启 history 模式非常容易，只需要在实例化路由时传入 mode:'history' 配置项即可，但缺少服务端支持时，基于 historyAPI 的路由无法从url地址栏直接访问指定页面，这个很容易理解，因为url地址栏里输入后回车相当于发送了一次 GET 请求，那么不带 # 的路由路径就和普通的 API 接口是一样的，既然服务端并没有定义这样的接口，那直接访问时出现404页面就很正常了。官方示例官方提供了很多处理这种场景的方式，以 node.js 版本的处理方案为例： const http = require('http') const fs = require('fs') const

How to cope with refreshing page with JS History API pushState

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A small website I was creating (more like fiddling) uses AJAX to load each page. Previously I was changing the hash of the url, this worked great but was ugly, and the user could refresh the page, and it would stay on the same page. Now I have switched to using pushState in the JS History API, which looks much better, and the back and forward work, but refreshing does not. For example: Going to: http://example.com/page2 goes to a 404 as there is no real page called page 2. But if I click on the button which uses the pushState method to change the url, it works as it should. How can allow

Is the deferred/promise concept in JavaScript a new one or is it a traditional part of functional programming?

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I really like the idea of jQuery's deferred/promise pattern or paradigm but sometimes I have trouble wrapping my aging brain around the finer points or specific implementation details. In fact recently I've found that the deferred/promise pattern/paradigm seems to predate jQuery and is also in at least these other JavaScript libraries/frameworks: Deferred github Q homepage task.js homepage when.js github wire.js github , presentation YUI gallery-deferred module I've probably missed some, included stuff that's really part of one of the others, and made other mistakes in that list... Please edit

What is “pass-by-name” and how does it work exactly?

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I've check wikipedia, and googled but I still can't wrap my mind around how pass-by-name works in ALGOL 60. I found a good explanation at Pass-By-Name Parameter Passing . Essentially, the body of a function is interpreted at call time after textually substituting the actual parameters into the function body. In this sense the evaluation method is similar to that of C preprocessor macros. By substituting the actual parameters into the function body, the function body can both read and write the given parameters. In this sense the evaluation method is similar to pass-by-reference. The difference

dva与create-react-app的结合使用

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　　dva与我们的create-react-app创建的两款脚手架是我们写react项目的两款优秀框架，之前一种使用create-react-app这款脚手架进行开发。然后这个框架美中不足的是redux方面着实令人书写麻烦然而dva框架就对其进行了封装改良使其看起来vuex相似度十分高下面给大家介绍下用这两个框架结合起来开发的步骤吧　　首先利用create-react-app生成一个脚手架然后下载一个dva和history包接着把脚手架生成的src全部删掉用我们自己的项目目录进行开发　　首先建立一个index.js文件夹作为我们项目的主入口 1 import dva from "dva"; 2 import App from "./App" 3 4 //注意这种引入方式已经报销在控制台会报警告 5 // import createHistory from 'history/createBrowserHistory'; 6 7 //这种为history路由展示方式 8 //const createHistory=require("history").createBrowserHistory 9 10 //这种为hash路由展示方式 11 const createHistory=require("history").createHashHistory 12 13

Could operator overloading have worked without references?

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问题 According to Bjarne Stroustrup, references were introduced into C++ to support operator overloading: References were introduced primarily to support operator overloading. C passes every function argument by value, and where passing an object by value would be inefficient or inappropriate the user can pass a pointer. This strategy doesn't work where operator overloading is used. In that case, notational convenience is essential because users cannot be expected to insert address-of operators if

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