随笔分类 - Javascript
摘要：The join() method joins all elements of an array into a string.var name = 'shane osbourne';var upper = name.split(' ') // [shane, osbourne].map(x => x...
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posted @ 2015-10-09 01:04
Zhentiw
摘要：For example there are two array of object and you want to print out each element, it is bad if you use two forEach method on each array:var people1 = ...
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posted @ 2015-10-09 00:37
Zhentiw
摘要：JSPM can handle installed packages, transpiling ES6, and bundling all from the command-line. This video gives a quick overview of install JSPM, instal...
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posted @ 2015-09-27 22:36
Zhentiw
摘要：Let's take a closer look at using Javascript's built in Array reduce function. Reduce is deceptively simple and when harnessed correctly can achieve v...
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posted @ 2015-09-02 14:51
Zhentiw
摘要：ESLint is a JavaScript linter (static analysis tool) that offers full support for ES6, JSX, and other modern tools via plugins. We walk through settin...
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posted @ 2015-08-28 03:57
Zhentiw
摘要：The very first thing to understand when we're talking about this-keyword is really understand what's the purpose of the this-keyword is, or why we eve
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摘要：Really the trick to flattening deeply nested structures is to just keep nesting map expressions until you have a variable or function argument, when i...
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posted @ 2015-08-12 16:46
Zhentiw
摘要：Refactoring is a great opportunity to learn and we have an existing Javascript function that islengthy, hard to understand, and overcomplicated. We'll...
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posted @ 2015-08-12 03:13
Zhentiw
摘要：Variable Hoisting// Variable Hoistingvar myVariable = 'Outer Value';var fn = function(){ alert(myVariable); var myVariable = 'New Local Value';};fn(...
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posted @ 2015-08-01 22:01
Zhentiw
摘要：Armed with themapandconcatAllfunctions, we can create fairly complex interactions in a simple way. We will use Observable to create a simple drag and ...
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posted @ 2015-06-30 21:37
Zhentiw
摘要：Like an array, Observable has a map method that allows us to transform a sequence into a new Observable.var Observable = Rx.Observable;//Create click ...
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posted @ 2015-06-25 04:55
Zhentiw
摘要：In this lesson we will get introduced to theObservabletype. An Observable is acollection that arrives over time. Observables can be used to model even...
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posted @ 2015-06-24 15:44
Zhentiw
摘要：Javascript modules are a design pattern that allow you to encapsulate your code into smaller self managing pieces. They help you separate your code, p...
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posted @ 2015-06-24 15:01
Zhentiw
摘要：This lesson shows how to refactor your old loops into using a simpler and more powerful lodash-style. We will start by looking at how many people trad...
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posted @ 2015-03-21 22:31
Zhentiw
摘要：In addition to flat Arrays, programmers must often deal with nested Arrays. For example let's say we have an Array of stock exchanges, each of which i
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posted @ 2015-03-21 22:23
Zhentiw
摘要：Both map and filter do not modify the array. Instead they return a new array of the results. Because both map and filter return Arrays, we can chain t
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posted @ 2015-03-21 22:16
Zhentiw
摘要：One very common operation in programming is to iterate through an Array's contents, apply a test function to each item, and create a new array contain
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posted @ 2015-03-21 22:12
Zhentiw
摘要：One very common operation in programming is to iterate through an Array's contents, apply a function to each item, and create a new array containing t
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posted @ 2015-03-21 22:06
Zhentiw
摘要：Most JavaScript developers are familiar with the for loop. One of the most common uses of the for loop is to iterate through the items in an array. In
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posted @ 2015-03-21 22:01
Zhentiw
摘要：Leaflet Demo $.getJSON('//jsbin.com/qogati/1.js', renderMap);function renderMap (geoData) { var map = L.map('map'); var osm = '//{s}.tiles.mapb...
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posted @ 2015-03-21 20:56
Zhentiw
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