lodash

Lodash - '_' refers to a UMD global and lodash.js is not a module errors

匿名 (未验证) 提交于 2019-12-03 01:33:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: If I do nothing and add the type definition it works for jquery but lodash gets a '_' referes to a UMD global, but the current file is a module. Consider adding an import instead. If I try to import lodash with any combination of import call, I get lodash.js is not a module I tried to get help by asking a question here and it was closed because there was another answer for Angular (Angular 2). I really need a real answer so I'm re-posting with my own solutions, hoping someone will eventually help me understand this problem. In this case I am

How to use Lodash to merge two collections based on a key?

匿名 (未验证) 提交于 2019-12-03 01:23:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have two collections, and the objects have a common key "userId". As below: var _= require('lodash'); var a = [ { userId:"p1", item:1}, { userId:"p2", item:2}, { userId:"p3", item:4} ]; var b = [ { userId:"p1", profile:1}, { userId:"p2", profile:2} ]; I want to merge them based on "userId" to produce: [ { userId: 'p1', item: 1, profile: 1 }, { userId: 'p2', item: 2, profile:2 }, { userId: 'p3', item: 4 } ] I have these so far: var u = _.uniq(_.union(a, b), false, _.property('userId')); Which result in: [ { userId: 'p1', item: 1 }, { userId

cannot find module “lodash”

匿名 (未验证) 提交于 2019-12-03 01:18:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Today I tried to learn more about Google Web Starter Kit so I followed these instructions and after a lot of fight and problem I just tried to start a local server (the first task we’ll look at is: $ gulp serve .) and received this error: C:\gwsk>gulp serve Error: Cannot find module 'lodash' at Function.Module._resolveFilename (module.js:338:15) at Function.Module._load (module.js:280:25) at Module.require (module.js:364:17) at require (module.js:380:17) at Object. (C:\gwsk\node_modules\browser-sync\node_modules\portsc anner-plus\lib\index

Lodash unexpectedly injects itself into global when required in subdependency

匿名 (未验证) 提交于 2019-12-03 01:05:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: My app depends on a library foolib , library foolib has a dependency on lodash and requires it via var _ = require('lodash') Requiring foolib results in lodash attaching itself to the window I found that this was due to this: https://github.com/lodash/lodash/blob/45785a282442399cfca829aea496104003f773e2/dist/lodash.js#L17041-L17046 // Some AMD build optimizers, like r.js, check for condition patterns like: if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) { // Expose Lodash on the global object to prevent errors

Sort array with lodash by value (integer)

倖福魔咒の 提交于 2019-12-03 00:57:45
I'm really struggling on that but I cannot find a solution. I have an array and I want to sort it by value (all integers). I thought, well let's use lodash, there sure must be a handy function for that. Somehow I cannot figure out to do this though. So far I got this: myArray = [3, 4, 2, 9, 4, 2] I got a result if I used this code: myArray = _(myArray).sort(); But unfortunately the return value does not seem to be an array anymore. myArray.length is undefined after the sorting. I found thousands of examples of lodash sorting array but always via key. https://lodash.com/docs#sortBy Can somebody

Lodash title case (uppercase first letter of every word)

人走茶凉 提交于 2019-12-03 00:52:42
I'm looking through the lodash docs and other Stack Overflow questions - while there are several native JavaScript ways of accomplishing this task , is there a way I can convert a string to title case using purely lodash functions (or at least existing prototypal functions) so that I don't have to use a regular expression or define a new function? e.g. This string ShouLD be ALL in title CASe should become This String Should Be All In Title Case This can be done with a small modification of startCase : _.startCase(_.toLower(str)); console.log(_.startCase(_.toLower("This string ShouLD be ALL in

Importing lodash into app.ts file

匿名 (未验证) 提交于 2019-12-03 00:44:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 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({ packages: { app: { format: 'register',

webpack学习笔记(四) 自动编译

匿名 (未验证) 提交于 2019-12-03 00:00:02
我们每次修改代码之后,如果想要在浏览器中看到变化,都先要手动编译代码,这样未免有些麻烦 在 webpack 中,配置某些选项可以帮助我们在代码发生变化之后自动编译代码 首先我们搭建一个简单的项目,感受一下在不使用自动编译之前项目开发的状态 创建一个空文件夹 Demo ,作为项目的根目录,在该目录下运行如下命令安装项目所需依赖 > # 创建 package.json 文件 > npm init -y > # 安装 webpack > npm install --save-dev webpack > npm install --save-dev webpack-cli > # 安装 lodash > npm install --save lodash 然后我们在根目录下创建 dist 和 src 目录,并在相应的目录下创建相应的文件,最终的目录结构如下 Demo - package.json - package-lock.json - webpack.config.js + node_modules + src - index.js + dist - index.html webpack.config.js 文件内容,指定 webpack 的一些基本配置 const path = require('path'); module.exports = { entry: './src

[TypeScript] Type Definitions and Modules

匿名 (未验证) 提交于 2019-12-02 23:05:13
For example you are building your own module, the same as Lodash: my-lodash.d.ts declare module "lodash" { declare interface FirstFunction { (data: any[]) :any; } declare interface Lodash { first: FirstFunction; } export const _: Lodash: } Normally you can install @types for popluar 3rd-party libs, if you have to build your own, you need to remember export type defination aas well for Typescript.

Lodash: Constructing single object from many - Merging/overriding properties

馋奶兔 提交于 2019-12-02 22:27:52
Note: I filed this question under lodash as I'm pretty sure it can help me solve that problem nicely, but haven't put my finger on it just now I have an object describing different user roles and their permissions; I will have something like 10-15 roles defined "like this" ( this doesn't reflect the application code but the problem itself ): var role1 = { views: { v1: {access: true}, v2: {access: false}, v#: {access: false} } } var role2 = { views: { v1: {access: false}, v2: {access: true}, v3: {access: true}, } } The user connected will have multiple roles; In that example it could be ['role1