lodash

问题 I'm using Lodash to search a nested array and want return the object if it finds a match. For each object, search for Bus 4. If found, return the object (in this case, school 'xyz'). var schools = [ { "id":1, "school":"abc", "bus":[ { "id":1, "name":"first bus" }, { "id":2, "name":"second bus" } ] }, { "id": 2, "school":"xyz", "bus":[ { "id":3, "name":"third bus" }, { "id":4, "name":"fourth bus" } ] } ] Here's what I have so far: _.forEach(schools, function(school){console.log(_.where(school

问题 If you have recently updated restangular through bower it will have installed the latest lodash - the new 4.0. However this is a problem as restangular/angular now throws the error - "_.contains() is not a function." How do you solve? 回答1: The solution is very simple - you need to tell restangular to use a lower version than the newest lodash - 3.10.0 Through bower.json "lodash": "~3.10.0" https://github.com/mgonto/restangular/issues/1298 回答2: If you have not specified the entry for lodash

问题 Component: import { Component, OnInit } from '@angular/core'; import { HttpClient } from '@angular/common/http'; import * as _ from 'lodash'; @Component({ selector: 'app-ore-table', templateUrl: './ore-table.component.html', styleUrls: ['./ore-table.component.less'] }) export class OreTableComponent implements OnInit { ores = '../assets/json/ores.json'; prices = 'https://esi.tech.ccp.is/latest/markets/prices/?datasource=tranquility'; oreArray: any; pricesArray: any; joinedArray: Array<any> =

问题 I am new to JSON and Postman. I believe I'm trying to do something very simple. I have created a GET request which will get a JSON response like the one below. In the example below I want to get the count of All "IsArchived" attributes in the response; The number of those attributes will vary from response to response. How can I do it? Thanks in advance { "Id": 1328, "Name": "AAA Test", "Owner": { "Id": 208, "Name": "The Boss" }, "FieldGroups": [ { "Id": "c81376f0-6ac3-4028-8d61-76a0f815dbf8"

问题 I wrote a customozer function to omit the undefined values of the object with cloneDeepWith . However on the immutable return, it is not digging in recursively. Here is my code: import { cloneDeepWith, pickBy, omit } from 'lodash'; const obj = { a0: true, b0: true, c0: undefined, obj1: { a1: true, b1: true, c1: undefined } }; cloneDeepWith(obj, value => { const objWithUndefinedValue = pickBy(obj, (value) => value === undefined); const keysWithUndefinedValue = Object.keys(objWithUndefinedValue

问题 I wrote the function below to return all keys in an object that match a specific pattern. It seems really round-about because there's no filter function in lodash for objects, when you use it all keys are lost. Is this the only way to filter an objects keys using lodash? export function keysThatMatch (pattern) { return (data) => { let x = _.chain(data) .mapValues((value, key) => { return [{ key: key, value: value }] }) .values() .filter(data => { return data[0].key.match(pattern) }) .zipWith

问题 I am using _.isEqual that compares 2 array of objects (ex:10 properties each object), and it is working fine. Now there are 2 properties (creation and deletion) that i need not to be a part of comparison. Example: var obj1 = {name: "James", age: 17, creation: "13-02-2016", deletion: "13-04-2016"} var obj2 = {name: "Maria", age: 17, creation: "13-02-2016", deletion: "13-04-2016"} // lodash method... _.isEqual(firstArray, secondArray) 回答1: You can use omit() to remove specific properties in an

问题 I used to write something like _.map(items, (item, index) => {}); with lodash. Usually I don't need index but sometimes it's useful. I'm migrating to Ramda now: R.map((item, index) => {}, items); index is undefined . Sure, I can create variable index in upper scope and increment it every time in map body but it's kinda wrong from FP point of view that Ramda stands for. So is there's any build in way of getting iteration index? 回答1: Check out addIndex: Creates a new list iteration function

问题 With the lodash library, I'd like to be able to pluck multiple values into a multi-dimensional array, along the lines of: var arr = [{ a: 2, b: 3, c: 4 }, { a: 1, b: 4, c: 2 }]; _.pluck(arr, ['a', 'c']) --> [[2, 4], [1, 2]] Is this possible? Thanks. 回答1: There is no pluck on multiple keys, but you can do this: _.map(['a', 'c'], function(path) { return _.pluck(arr, path); }); This will return values grouped by key. Edit: _.mpluck = function(collection, paths) { return _.zip( _.map(paths,

问题 I have component Comp1 and it's child Comp2 . The state of markers is set in the parent component to this object: var MARKER_ITEMS = { "item1" : { "cat" : "wow", "img" : "slide", "info" : "bike", "key" : "1" }, "item2" : { "cat" : "omg", "img" : "slide", "info" : "4x4", "key" : "2" } }; When I try to generate a Comp2 for each object with loadash _.map , the props get passed down as undefined. jsfiddle 回答1: Your code works but you're using the key name as a props. key is a special reserved