What is lambda?

Possible Duplicate: What is the difference between a 'closure' and a 'lambda'? Hello everyone! I'm a JavaScript developer. I know what is closure and how it works in JavaScript. But today I see a new noun "lambda". What is lambda? It appears to be relevant to closure in JavaScript. What's the difference between lambda and closure in JavaScript? Than

什么是lambda?

可能重复: '封'和'lambda'有什么区别? 大家好! 我是一名JavaScript开发人员。 我知道什么是闭包,以及它如何在JavaScript中工作。 但今天我看到一个新名词“lambda”。 什么是lambda? 它似乎与JavaScript中的关闭有关。 在JavaScript中lambda和closure有什么区别? 谢谢! 参考维基百科: 在数学逻辑和计算机科学中,lambda演算也被写为λ演算,是一个用于函数定义,函数应用和递归的形式化

JavaScript closures vs. anonymous functions

A friend of mine and I are currently discussing what is a closure in JS and what isn't. We just want to make sure we really understand it correctly. Let's take this example. We have a counting loop and want to print the counter variable on the console delayed. Therefore we use setTimeout and closures to capture the value of the counter variable to make sure that it will not print N t

JavaScript关闭与匿名函数

我和我的一位朋友正在讨论什么是JS的封闭,什么不是。 我们只是想确保我们确实正确地理解它。 我们来看一下这个例子。 我们有一个计数循环,并希望在控制台上打印计数器变量。 因此,我们使用setTimeout和闭包来捕获计数器变量的值,以确保它不会打印N次N值。 错误的解决方案,而闭合或接近闭合 ,以将任何东西: for(var i = 0; i < 10; i++) { setTimeout(function() { console.log(i); }, 1000); }

What is a lambda language?

I was reading "JavaScript: The Good Parts" and the author mentions that JavaScript is the first of the lambda languages to be launched. JavaScript's functions are first class objects with (mostly) lexical scoping. JavaScript is the first lambda language to go mainstream. Deep down, JavaScript has more in common with Lisp and Scheme than with Java. It is Lisp in C's clothing

什么是lambda语言?

我正在阅读“JavaScript:The Good Parts”,作者提到JavaScript是第一批要发布的lambda语言。 JavaScript的函数是带有(主要)词法作用域的第一类对象。 JavaScript是第一个成为主流的lambda语言 。 在深层次方面,JavaScript与Lisp和Scheme比Java更有共同之处。 它是C的服装中的Lisp。 这使JavaScript成为非常强大的语言。 我没有得到什么是lambda语言。 这种语言的属性是什么,它与Java,C,C ++和Php等语言有什么不同

How do I learn about "closures" usage?

From Wikipedia, the free encyclopedia: Closure (computer science) In computer science, a closure is a function that is evaluated in an environment containing one or more bound variables. When called, the function can access these variables. The explicit use of closures is associated with functional programming and with languages such as ML and Lisp. Constructs such as objects in other langua

我如何了解“封闭”使用情况?

维基百科,自由的百科全书: Closure(计算机科学) 在计算机科学中,闭包是一个在包含一个或多个绑定变量的环境中进行评估的函数。 被调用时,函数可以访问这些变量。 明确使用闭包与函数式编程和ML和Lisp等语言相关。 诸如其他语言中的对象的构造也可以用闭包来建模。 要在JavaScript中使用这个内容,有人能指出我如何适用这个例子吗? (使用来自jQuery的示例) function SetClassOnHover(className){ $("td").hov

Is there such a thing as a "Javascript context" in C#

This question already has an answer here: What are 'closures' in .NET? 11 answers The lambda created in method captures any variables referenced inside the lambda. See this article: https://blogs.msdn.microsoft.com/matt/2008/03/01/understanding-variable-capturing-in-c/

在C#中有没有这样的“Javascript上下文”

这个问题在这里已经有了答案: 什么是.NET中的“闭包”? 11个答案 在method创建的lambda捕获lambda内引用的任何变量。 看到这篇文章:https://blogs.msdn.microsoft.com/matt/2008/03/01/understanding-variable-capturing-in-c/

how to cross direct user with google analytics

After a user fills in my "new" user form on "example-one.com", the "create" controller creates the record in the db. Then it does a redirect_to to an external site "payment-checkout.com". I have setup the Google Analytics code on both sites. Google provides two functions _link and _linkByPost for use to use in any links or forms that go to your external

如何使直接用户与谷歌分析

用户在“example-one.com”填写我的“新”用户表单后,“创建”控制器在db中创建记录。 然后它执行redirect_to到外部网站“payment-checkout.com”。 我已在这两个网站上设置了Google Analytics代码。 Google提供两种功能_link和_linkByPost,用于在任何链接或表单中使用您的外部域。 问题是用户被视图外的控制器操作重定向,我不能使用这两个javascript函数传递相关的GA信息 - 我该怎么做? 谁能帮忙? _link工作的方式是将Goo

Losing hover when animating with jQuery (without moving mouse)

I have this row of thumbnails that I am animating with jQuery. Each of these thumbnails has a hover and active class. They work fine but when I animate the list, the new thumbnail under the mousecursor does not apply the hover? I have to move the mouse a little bit after each click? It's kinda difficult to exaplain.. I have made a fiddle here: http://jsfiddle.net/nZGYA/ When you star

在使用jQuery进行动画时丢失悬停(不移动鼠标)

我有用jQuery制作动画的这一行缩略图。 每个缩略图都有一个悬停和活动类。 它们工作正常,但是当我为列表设置动画时,mousecursor下的新缩略图不适用悬停? 每次点击后我必须移动鼠标一点点? 这是有点难以exaplain ..我在这里做了一个小提琴:http://jsfiddle.net/nZGYA/ 当你在没有移动鼠标的情况下开始点击拇指3后,你会看到我的意思...... 它在FireFox,NOT Safari,Chrome,IE等中工作正常。 我能做些什么吗?

jQuery.ajax() and sending boolean request arguments

$.ajax({ url : uri, type : 'post', data : {someBooleanVar1: false, subVar: {someBooleanVar2: true}} }); The problem is that on server someBooleanVar1 and someBooleanVar2 will be received as strings "false" and "true", but not as "0" and "1". Is there any way to automatically convert boolean arguments to "1" and "0"? 有一个固定版

jQuery.ajax()并发送布尔请求参数

$.ajax({ url : uri, type : 'post', data : {someBooleanVar1: false, subVar: {someBooleanVar2: true}} }); 问题是,在服务器上someBooleanVar1和someBooleanVar2将被接收为字符串“false”和“true”,但不是“0”和“1”。 有没有办法自动将布尔参数转换为“1”和“0”? 有一个固定版本的@jcubic答案: function convertBoolToNum(obj) { $.each(obj, function(i) { if (typeof obj[i] == 'object') {

Get URL array variables in javascript/jquery

I've got a bunch of parameters being passed to a page by URL variables. The URL looks sort of like: file.aspx?category[]=1&category[]=7&category[]=3&id=8az Using the jQuery getUrlParam extension I can get url variables very easily, but rather than returning category as an array (which is what I want) it gets returned as null. Is there a way for me to read these into a javas

在javascript / jquery中获取URL数组变量

我有一堆参数被URL变量传递给页面。 该URL看起来有点像: file.aspx?类别[] = 1&类别[] = 7&类别[] = 3&ID = 8az 使用jQuery getUrlParam扩展我可以非常容易地获得url变量,但不是将数组作为数组返回(这是我想要的),它返回为null。 有没有一种方法可以让我将它们读入JavaScript数组中? 不应该是: file.aspx?category=1&category=7&category=3 我之前指出这个问题:使用jQuery获取QueryString值 - 但正

How can I force clients to refresh JavaScript files?

We are currently working in a private beta and so are still in the process of making fairly rapid changes, although obviously as usage is starting to ramp up, we will be slowing down this process. That being said, one issue we are running into is that after we push out an update with new JavaScript files, the client browsers still use the cached version of the file and they do not see the update

我如何强制客户端刷新JavaScript文件?

我们目前正在进行一次私人测试,因此它们仍在进行相当快速的变化,但显然随着使用量的增加,我们将放慢这一过程。 话虽如此,我们遇到的一个问题是,当我们推出新的JavaScript文件的更新后,客户端浏览器仍然使用缓存版本的文件,但他们没有看到更新。 显然,在支持调用中,我们可以简单地通知他们执行ctrlF5刷新,以确保他们从服务器获取最新文件,但在此之前处理此问题将更可取。 我们目前的想法是简单地将版本号附加到Jav