lodash

1.为什么要引入webpack 网页中会有一些需要引入的常见的静态资源，比如：js、css、images、font,当网页中需要引入的静态资源多了，网页需要发送很多的二次请求，并且对于有依赖的关系的静态资源需要注意引用的时候的顺序，那么这些问题就可以用webpack来轻松解决。webpack可以实现资源的合并、打包、压缩处理复杂的依赖关系 2.什么是webpack Webpack可以看做是模块打包机：它做的事情就是分析你的项目结构，找到JavaScript模块以及其它的一些浏览器不能直接运行的拓展语言（Scss，TypeScript等），并将其转换和打包为合适的格式供浏览器使用。 Webpack的工作方式是：把你的项目当做一个整体，通过一个给定的主文件（如：index.js），Webpack将从这个文件开始找到你的项目的所有依赖文件，使用loaders处理它们，最后打包为一个（或多个）浏览器可识别的JavaScript文件。 3.准备 webpack是基于Node，务必安装Node,Node安装后自带npm（ Nodejs下的包管理器） 4.webpack使用 Webpack可以使用npm安装，新建一个空的练习文件夹，在终端中转到该文件夹后执行下述指令就可以完成安装。下面我们看下步骤 1.新建一个空的文件夹，初始化 npm npm init -y/

I created template in index.html to generate html-code with js, code below. My Webpack configuration also below. When I run it with webpack-dev-server, I get error: title is not defined. Somehow webpack tries to resolve 'title' by self, instead of delegate it to 'lodash/template'. Please help me fix code, I'm in despair(. import path from 'path'; import glob from 'glob'; import webpack from 'webpack'; import ExtractTextPlugin from 'extract-text-webpack-plugin'; import HtmlWebpackPlugin from 'html-webpack-plugin'; const inProduction = process.env.mode === 'production'; export default { entry: {

当你使用JavaScript进行编程的时候，你很可能需要经常重复写一些工具函数，尤其是处理字符串和对象。 即使ES6已经被标准化了，JavaScript开发者依然无法获得像Objective-C或Ruby那样多的语法糖。 因此，在JavaScript应用中仍然被重复的编写大量的工具函数。而本文将会为你带来的救星就是 Loadsh 。 本文将要介绍的是Loadash中的10个常用的工具函数，当然对于不同的工作，你很可能也会需要其他的工具函数， 本文仅作为一个入门Lodash的引子，完整的函数列表请参考Lodash的 API文档 。 本文使用的Lodash版本是 3.10.1 。 Statement 原文地址： http://colintoh.com/blog/lodash-10-javascript-utility-functions-stop-rewriting 循环N次 // 1. Basic for loop. for ( var i = 0 ; i < 5 ; i++) { // .... } // 2. Using Array's join and split methods Array .apply( null , Array ( 5 )). forEach ( function () { // ... }); // Lodash _.times( 5 ,

lodash有许多工具类函数，这里列举本人常用的几个。 合并数组 _.flattenDeep([1, [2, [3, [4]], 5]]); // => [1, 2, 3, 4, 5] 合并去重 _.union([2], [1, 2]); // => [2, 1] var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; _.unionWith(objects, others, _.isEqual); // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); // => [{ 'x': 1 }, { 'x': 2 }] 对象数组去重 _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); // => [{ 'x': 1 }, { 'x': 2 }] 排序 var users = [ { 'user': 'fred', 'age': 48 }, { 'user': 'barney',

I am trying to get max and min values of arrays values inside objects array which looks like this: [ { id: 1, enabled: false, layer: 'Mood', color: '#f16c63', points: [ {date: '2013-01-02', value: 20}, {date: '2013-02-02', value: 15}, {date: '2013-03-12', value: 24}, {date: '2013-03-23', value: 18}, {date: '2013-03-24', value: 22}, {date: '2013-04-09', value: 12}, {date: '2013-06-13', value: 16}, {date: '2013-06-14', value: 20}, ] }, { id: 2, enabled: true, layer: 'Performance', color: '#698bfc', points: [ {date: '2013-01-02', value: 15}, {date: '2013-02-02', value: 24}, {date: '2013-03-12',

var array1 = [{Age: 24, Name: "Test", StudentID: 101, Checked: false}, {Age:25, Name: "Test", StudentID: 102, Checked: false}]; var array2 = [{ID: 101}]; If any element in array1 has a property of StudentID that is equal to an ID property present in array2 I'd like to set the Checked property in array1 to true. Any tips? I'd like to do this without writing nested _.each statements. This is my first take; however, I believe _.some performs an interation anyway. _.each($scope.array1, function(element1) { if(_.some($scope.array2, { ID: element1.ID })) { element1.Checked = true; } }); Using lodash

I'm trying to use lodash in my angular2 project. $ npm install --save lodash $ npm install --save @types/lodash I got this warning messages from installing lodash And this one for the types I ignored those warning messages and continue. Now in my component, I added this line.. import * as _ from 'lodash'; when the app starts to compile I get this errors in my console: ERROR in [default] /path/to/project/node_modules/@types/lodash/index.d.ts:244:12 Duplicate identifier '_'. ERROR in [default] /path/to/project/node_modules/@types/lodash/index.d.ts:244:15 Cannot find namespace '_'. ERROR in

As you can see in the image below, I have some returned json data with three objects; each contains a clients id => data. exact_match : {104} match_4 : {104, 103} match_2 : {104, 103, 68} How can I "trim" or remove the duplicate objects based on previous ones? something like: exact_match : {104} match_4 : {103} match_2 : {68} I tried _.difference but did not work (Maybe because it is for arrays not objects?): var exact_match = data.exact_match, match_four_digits = _.difference(data.match_4, data.exact_match), match_two_digits = _.difference(data.match_2, data.exact_match, data.match_4), Any