lodash

webpack-开发-使用 source map

由 只愿长相守 提交于 2020-01-17 03:51:48
1.环境准备和命令 npm init -y npm install --save-dev webpack npm install --save-dev webpack-cli npm install --save lodash npm install --save-dev html-webpack-plugin npm install clean-webpack-plugin --save-dev npm run build 2.目录 3.代码文件 dist/index.html(这个文件是自动生成的) <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Output Management</title> </head> <body> <script type="text/javascript" src="app.bundle.js"></script> <script type="text/javascript" src="print.bundle.js"></script> </body> </html> src/index.js import _ from 'lodash'; import printMe from './print.js'; function component() { var

npm学习（三）之如何安装本地包、更新本地安装的包、卸载本地安装的包

由 僤鯓⒐⒋嵵緔 提交于 2020-01-16 06:40:49
如何安装本地包 有两种方式用来安装 npm 包：本地安装和全局安装。至于选择哪种方式来安装，取决于我们如何使用这个包。 如果你自己的模块依赖于某个包，并通过 Node.js 的 require 加载，那么你应该选择本地安装，这种方式也是 npm install 命令的默认行为。 如果你想将包作为一个命令行工具，（比如 grunt CLI），那么你应该选择 全局安装 。 想要了解更多关于 install 命令行的行为，可以查看 CLI 文档 。 安装一个包 安装 可以使用下面的命令来安装一个包： npm install <package_name> 上述命令执行之后将会在当前的目录下创建一个 node_modules 的目录（如果不存在的话），然后将下载的包保存到这个目录下。 测试： 为了确认 npm install 是正常工作的，可以检查 node_modules 目录是否存在，并且里面是否含有你安装的包的文件夹。 实例： 安装一个叫做 lodash 的包。安装成功之后，如果 node_modules 目录下存在一个名为 lodash 的文件夹，则说明成功安装了这个包。 Microsoft Windows: C:\ npm install lodash C:\ dir node_modules #=> lodash macOS, Ubuntu, Debian > npm

_.merge clones sub-documents instead of updating

由 对着背影说爱祢 提交于 2020-01-15 09:16:36
问题 In my Angular fullstack project I try to update a project adding a new sub-document to it. When checking my req.body before merging it all looks as it should. However after the merge the updated document has added a new sub-document as it should, the only problem is that this new document is a clone of an already existing one, instead of the one it should have been. the _.merge is from lodash the code: console.log(''); console.log('notes before merging : ', entry.notes); console.log('');

_.merge clones sub-documents instead of updating

由 前提是你 提交于 2020-01-15 09:14:55
问题 In my Angular fullstack project I try to update a project adding a new sub-document to it. When checking my req.body before merging it all looks as it should. However after the merge the updated document has added a new sub-document as it should, the only problem is that this new document is a clone of an already existing one, instead of the one it should have been. the _.merge is from lodash the code: console.log(''); console.log('notes before merging : ', entry.notes); console.log('');

How to find common properties between JavaScript objects

由 雨燕双飞 提交于 2020-01-14 12:39:28
问题 What is the best/most efficient way to find the common/different properties of an array of objects. I need to identify the set of properties that exists in all objects and all have the same value(the common). Preferably I would also like to get an array with all other properties (the diff). I have searched for an efficient library/function that can do it. But didn't find anything. So I tried on my own. Consider this array of JS objects: var objects = [{ id: '2j2w4f', color: 'red', height: 20,

How to use filter array of objects by 2 conditions with an arrow function in js? [duplicate]

由 ≯℡__Kan透↙ 提交于 2020-01-14 07:01:21
问题 This question already has answers here : Filter array of objects by multiple properties and values (3 answers) Closed 11 months ago . Suppose I have an array like: const items=[{ "taskType": "type2", "taskName": "two", "id": "19d0da63-dfd0-4c00-a13a-cc822fc81298" }, { "taskType": "type1", "taskName": "two", "id": "c5385595-2104-409d-a676-c1b57346f63e" }] I want to have an arrow (filter) function that returns all items except for where taskType=type2 and taskName=two. So in this case it just

Importing lodash into app.ts file

由 巧了我就是萌 提交于 2020-01-14 05:32:06
问题 I am trying lodash uniqBy function to filter in my Angular 2 application. But, I am getting error in import statement import * as _ from 'lodash'; . I tried import _ from 'lodash'; , import _ from 'lodash/lodash'; , import * as _ from 'lodash/lodash'; also, but getting the same error i.e. Cannot find module 'lodash' . After checking angular2 failing lodash import, and Importing lodash into angular2 + typescript application, I mapped lodash to my system.config like so <script> System.config({

lodash/underscore; compare two objects and remove duplicates

由 白昼怎懂夜的黑 提交于 2020-01-13 11:24:26
问题 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,

check if key exists in object with lodash

由 拈花ヽ惹草 提交于 2020-01-13 08:28:10
问题 I need help with lodash cause i dont understand functional programming and lodash is very helpfull with object/arrays operations. I need to search objects inside object and return true if key exists. I've setup a jsfiddle. Apreciate your help. var dependsOn={ "Cadastro": { "RHID": "RHID" }, "Agregados":{ "CD_DOC":"CD_DOC" } "Documentos":{ "RHID":"CD_DOC" } } var field='RHID' alert(_.contains(_.keys(dependsOn), field)) https://jsfiddle.net/88gwp87k/ 回答1: Try this. it's simple _.has(dependsOn,

Lodash map and return unique

由 狂风中的少年 提交于 2020-01-12 06:32:51
问题 I have a lodash variable; var usernames = _.map(data, 'usernames'); which produces the following; [ "joebloggs", "joebloggs", "simongarfunkel", "chrispine", "billgates", "billgates" ] How could I adjust the lodash statement so that it only returns an array of unique values? e.g. var username = _.map(data, 'usernames').uniq(); 回答1: Many ways, but uniq() isn't a method on array, it's a lodash method. _.uniq(_.map(data, 'usernames')) Or: _.chain(data).map('usernames').uniq().value() (The second
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