lodash

Lodash一个一致性、模块化、高性能的 JavaScript 实用工具库

末鹿安然 提交于 2020-01-25 08:39:55
Lodash一个一致性、模块化、高性能的 JavaScript 实用工具库。 difference() Lodash中文文档 npm lodash-es Vue项目引入 npm i lodash - es import { cloneDeep , mergeWith , throttle , debounce , tail , set , get , transform , isEqual , isObject , pick , groupBy , camelCase } from 'lodash-es' export { cloneDeep , mergeWith , throttle , debounce , set , get , transform , isEqual , isObject , pick , groupBy , camelCase , } // mergeWith(object, sources, customizer) 它接受一个 customizer,调用以产生目标对象和来源对象属性的合并值。如果customizer 返回 undefined,将会由合并处理方法代替。 customizer调用与7个参数:(objValue, srcValue, key, object, source, stack)。 这方法会改变对象 object. // tail

Create an object based on the keys in array of objects

折月煮酒 提交于 2020-01-25 07:25:09
问题 I am having an array of objects and I want to create another object based on their keys. For example I am having an array as var arr = [{1: 36011, 2: 18320, 3: 36011, 4: 10570}, {1: 19754, 2: 6722, 3: 19754, 4: 6699}, {1: 15711, 2: 10039, 3: 15711, 4: 4172}] and I want my result array as var result = {1:[36011,19754,15711], 2:[18320,6722,10039],..} I was suggested to use lodash, I am new to this so I've tried using reduce var i = 1, new_arr = {}; _.reduce(arr, function(key, val){ new_arr[i++]

Get environment specific configuration from a JSON object using Lodash

六月ゝ 毕业季﹏ 提交于 2020-01-25 03:11:53
问题 Given that I have the following JSON object, dbConfig = { "db": "default", "default": { "defaultDB": "sqlite", "init": "init", "migrations": { "directory": "migrations", "tableName": "migrations" }, "pool": { "min": "2", "max": "10" }, "sqlite": { "client": "sqlite3", "connection": { "filename": "data/default/sqlitedb/test.db" } }, "oracle": { "client": "oracledb", "config": { "development": { "user": "test", "pass": "test", "db": "test" }, "production": { "user": "test", "pass": "test", "db"

Get environment specific configuration from a JSON object using Lodash

寵の児 提交于 2020-01-25 03:11:32
问题 Given that I have the following JSON object, dbConfig = { "db": "default", "default": { "defaultDB": "sqlite", "init": "init", "migrations": { "directory": "migrations", "tableName": "migrations" }, "pool": { "min": "2", "max": "10" }, "sqlite": { "client": "sqlite3", "connection": { "filename": "data/default/sqlitedb/test.db" } }, "oracle": { "client": "oracledb", "config": { "development": { "user": "test", "pass": "test", "db": "test" }, "production": { "user": "test", "pass": "test", "db"

Find a value in json object using lodash methods flatten and find

一世执手 提交于 2020-01-24 10:21:19
问题 Using lodash i want to find a team whose id is 3229. I tried following but it is not returning anything. var team = _.chain(data.teams) .flatten("divisionTeams") .find({"id":3229}) .value(); Here is my plunker code. http://plnkr.co/edit/UDwzRkX3zkYjyf8UwO7I For the Json data please see the file data.js in Plunker. Please note i cannot change the json data since i am calling a test api. 回答1: flatten doesn't take that argument, see docs. You need to either map or pluck the divisionTeams . _

Find a value in json object using lodash methods flatten and find

感情迁移 提交于 2020-01-24 10:21:06
问题 Using lodash i want to find a team whose id is 3229. I tried following but it is not returning anything. var team = _.chain(data.teams) .flatten("divisionTeams") .find({"id":3229}) .value(); Here is my plunker code. http://plnkr.co/edit/UDwzRkX3zkYjyf8UwO7I For the Json data please see the file data.js in Plunker. Please note i cannot change the json data since i am calling a test api. 回答1: flatten doesn't take that argument, see docs. You need to either map or pluck the divisionTeams . _

从GitHub存储库下载单个文件夹或目录

痴心易碎 提交于 2020-01-23 02:35:47
如何从 GitHub 上托管的远程Git存储库中仅下载特定文件夹或目录? 假设示例GitHub存储库位于此处: git@github.com:foobar/Test.git 其目录结构: Test/ ├── foo/ │ ├── a.py │ └── b.py └── bar/ ├── c.py └── d.py 我只想下载 foo 文件夹,而不克隆整个Test项目。 #1楼 这是SVN比Git更好的少数几个地方之一。 最后,我们倾向于以下三种选择: 使用wget从GitHub抓取数据(使用原始文件视图)。 让上游项目将所需的数据子集发布为构建工件。 放弃并使用完整的结帐。 在第一个版本中这是一个很大的成功,但是除非您获得大量流量,否则在后续版本中不会有太多麻烦。 #2楼 如果要下载的目录是一个单独的库,最好创建另一个git repo,然后再使用git子模块功能。 当然,您必须是您想要的初始回购的所有者 #3楼 对于通用git Repo: 如果要下载文件,而不是使用历史记录克隆存储库,则可以使用 git-archive 。 git-archive 创建git存储库的压缩zip或tar存档。 一些使它特别的东西: 您可以选择git存储库中要归档的文件或目录。 它不会在运行它的存储库中存档 .git/ 文件夹或任何未跟踪的文件。 您可以存档特定的分支,标记或提交。

模块系统(待更新)

我与影子孤独终老i 提交于 2020-01-23 00:17:01
如果你使用了 webpack (或在内部使用了 webpack 的 Vue CLI 3+),那么就可以使用 require.context 只全局注册这些非常通用的基础组件。这里有一份可以让你在应用入口文件(比如 src/main.js ) 中全局导入基础组件的示例代码: import Vue from 'vue' import upperFirst from 'lodash/upperFirsh' import camelCase from ‘lodash / camelCase’ const requireComponent = require . context ( // 其组件目录的相对路径 ‘ . / components’, // 是否查询器子目录 false , // 匹配基础组件文件名的正则表达式 / Base [ A - Z ] \w + \ . ( vue | js ) $ / , ) ; requireComponent . keys ( ) . forEach ( fileName => { // 获取组件配置 const componentConfig = requireComponent ( fileName ) ; // 获取组件的 PascalCase 命名 const componentName = upperFirst ( camelCase (

lodash for “select by object path”?

馋奶兔 提交于 2020-01-22 17:31:53
问题 Let's say I have this object (or an array of these objects): var person = { birth: { place: { country: 'USA' } } }; I thought there was a lodash function where I could pass in 'birth.place.country' and get back the value USA . Is there such a function in lodasdh 3.x, or am I Imagining this? 回答1: You could use the _.get function: _.get(person, 'birth.place.country', 'optionalDefaultValue'); lodash also provides a function called _.result that can also call functions. 回答2: Note: for an array of

lodash for “select by object path”?

笑着哭i 提交于 2020-01-22 17:31:04
问题 Let's say I have this object (or an array of these objects): var person = { birth: { place: { country: 'USA' } } }; I thought there was a lodash function where I could pass in 'birth.place.country' and get back the value USA . Is there such a function in lodasdh 3.x, or am I Imagining this? 回答1: You could use the _.get function: _.get(person, 'birth.place.country', 'optionalDefaultValue'); lodash also provides a function called _.result that can also call functions. 回答2: Note: for an array of