lodash

Find number of occurences of string elements in an Array using lodash or underscore js

由 不想你离开。 提交于 2020-01-12 05:29:07
问题 I have an array in the following format: var array = [ { id: '555weibo' }, { id: '578weibo' }, { id: '111facebook' }, { id: '123facebook' }, { id: '145facebookpage' }, { id: '145facebookpage' }, { id: '766facebook' }, { id: '242facebook' }, { id: '432twitter' }, { id: '432exing' } ]; I need to find the number of occurrences of facebook , twitter , xing , and weibo inside that array. eg: { weibo: 2, facebook: 6, twitter: 1, xing: 1 } I've searched for a solution, but nothing seems to work. The

Find and replace value inside an array of objects javascript [duplicate]

由 孤者浪人 提交于 2020-01-12 03:54:04
问题 This question already has answers here : How to change value of object which is inside an array using JavaScript or jQuery? (19 answers) Closed 2 years ago . I have an array of objects: [ { "enabled": true, "deviceID": "eI2K-6iUvVw:APA" }, { "enabled": true, "deviceID": "e_Fhn7sWzXE:APA" }, { "enabled": true, "deviceID": "e65K-6RRvVw:APA" }] A POST request is coming in with the deviceID of eI2K-6iUvVw:APA , all i want to do is to iterate the array, find the deviceID and change the enabled

Javascript: Convert dot-delimited strings to nested object value

由 不想你离开。 提交于 2020-01-10 19:36:14
问题 I have a bunch of object attributes coming in as dot-delimited strings like "availability_meta.supplier.price" , and I need to assign a corresponding value to record['availability_meta']['supplier']['price'] and so on. Not everything is 3 levels deep: many are only 1 level deep and many are deeper than 3 levels. Is there a good way to assign this programmatically in Javascript? For example, I need: ["foo.bar.baz", 1] // --> record.foo.bar.baz = 1 ["qux.qaz", "abc"] // --> record.qux.qaz =

lodash用法系列2: 处理对象

由 泄露秘密 提交于 2020-01-10 12:23:21
Lodash用来操作对象和集合，比Underscore拥有更多的功能和更好的性能。 官网：https://lodash.com/ 引用：<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script> 安装：npm install lodash 首先通过npm安装lodash: npm i --save lodash 在js文件中引用lodash: var _ = require('lodash'); import * as _ from "lodash"; 转： 来源： https://www.cnblogs.com/ostrich-sunshine/p/11939946.html

lodash用法系列3: 使用函数

由 杀马特。学长 韩版系。学妹 提交于 2020-01-10 12:14:20
Lodash用来操作对象和集合，比Underscore拥有更多的功能和更好的性能。 官网：https://lodash.com/ 引用：<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script> 安装：npm install lodash 首先通过npm安装lodash: npm i --save lodash 在js文件中引用lodash: var _ = require('lodash'); import * as _ from "lodash"; 转： 来源： https://www.cnblogs.com/ostrich-sunshine/p/11939957.html

lodash用法系列5:链式

由 与世无争的帅哥 提交于 2020-01-10 11:51:53
Lodash用来操作对象和集合，比Underscore拥有更多的功能和更好的性能。 官网：https://lodash.com/ 引用：<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script> 安装：npm install lodash 首先通过npm安装lodash: npm i --save lodash 在js文件中引用lodash: var _ = require('lodash'); import * as _ from "lodash"; 转： 官网：https://lodash.com/ 引用：<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script> 安装：npm install lodash 首先通过npm安装lodash: npm i --save lodash 在js文件中引用lodash: var _ = require('lodash'); import * as _ from "lodash"; 转： 官网：https://lodash.com/ 引用：<script src="//cdnjs.cloudflare.com

lodadsh 问题集锦

由 自闭症网瘾萝莉.ら 提交于 2020-01-10 11:49:07
项目里用到了Lodash。感觉有些还是很好用。就自己开研究了下。 参考链接： Lodash 中文文档 首先说明 Lodash 就是一个工具库，有很多比较好用的方法可以帮助我们提高开发效率。 Lodash 通过降低 array、number、objects、string 等等的使用难度从而让 JavaScript 变得更简单。 Lodash 的模块化方法 非常适用于： 遍历 array、object 和 string 对值进行操作和检测 创建符合功能的函数 具体的 Lodash 提高效率这些我们就不提了，这里也只是现学现卖，关于提高执行效率在参考链接里有提到。我们这里只介绍使用了。 安装/引入 1. 页面直接通过 script 引入 <script type="text/javascript" src="https://cdn.jsdelivr.net/g/lodash@4(lodash.min.js+lodash.fp.min.js)"></script> 直接引入lodash.js是不行的，lodash/fp模块提供了更接近函数式编程的开发方式，其内部的函数经过包装。不过一般我们都是通过npm安装再通过module引入使用的。 2. 模块式引入 import * as _ from'lodash'; 3. AMD/CMD引入 require(['lodash'],function

using lodash to compare arrays (items existence without order)

由 房东的猫 提交于 2020-01-09 07:04:29
问题 I know I can do it using loops, but I am trying to find an elegant way of doing this: I have two arrays: var array1 = [['a', 'b'], ['b', 'c']]; var array2 = [['b', 'c'], ['a', 'b']]; I want to use lodash to confirm that the two are the same. By 'the same' I mean that there is no item in array1 that is not contained in array2. In terms of checking equality between these items: ['a', 'b'] == ['b', 'a'] or ['a', 'b'] == ['a', 'b'] both work since the letters will always be in order. Thanks in

How to do a deep comparison between 2 objects with lodash?

由 拈花ヽ惹草 提交于 2020-01-08 18:42:12
问题 I have 2 nested objects which are different and I need to know if they have difference in one of their nested properties. var a = {}; var b = {}; a.prop1 = 2; a.prop2 = { prop3: 2 }; b.prop1 = 2; b.prop2 = { prop3: 3 }; The object could be much more complex with more nested properties. But this one is a good example. I have the option to use recursive functions or something with lodash... 回答1: An easy and elegant solution is to use _.isEqual, which performs a deep comparison: var a = {}; var

How to do a deep comparison between 2 objects with lodash?

由 妖精的绣舞 提交于 2020-01-08 18:41:10
问题 I have 2 nested objects which are different and I need to know if they have difference in one of their nested properties. var a = {}; var b = {}; a.prop1 = 2; a.prop2 = { prop3: 2 }; b.prop1 = 2; b.prop2 = { prop3: 3 }; The object could be much more complex with more nested properties. But this one is a good example. I have the option to use recursive functions or something with lodash... 回答1: An easy and elegant solution is to use _.isEqual, which performs a deep comparison: var a = {}; var
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