lodash

问题 I am using lodash to perform some filtering. I have this functions: filterByCardinalPoint = (key, value) => { const { passengersData } = this.props; console.log('passengersData', passengersData); return filter(passengersData, [key, value]); }; callFilter = () => { passengersGoingNorth = this.filterByCardinalPoint('cardinalpoint', 'N') .length; passengersGoingSouth = this.filterByCardinalPoint('cardinalpoint', 'S') .length; passengersGoingWest = this.filterByCardinalPoint('cardinalpoint', 'W')

问题 I have React-Redux container where a bunch of buttons are dynamically generated. Below them are Select All and Clear Selection buttons. When a button is clicked, it is sent to a method where it setState that the button is active and sends information about the selected button to an action that determines how things are rendered below the buttons. Anyway, when I select a button one at a time, it adds to the state and permits the selecting of multiple buttons. When I use Select All, it only

问题 This question already has answers here : lodash: Get duplicate values from an array (11 answers) Closed 3 years ago . I'm using lodash and I have an array: const arr = ['firstname', 'lastname', 'initials', 'initials']; I want a new array containing only the values that appear more than once (the duplicate values). It seems like this is something lodash might have a specific method for, but I can't see one. Something like: const dups = _.duplicates(arr); would be nice. I've got: // object with

问题 I am trying to create an array from an object in AngularJS to use for ui-bootstrap's typeahead. I am able to pluck a single value out of the object ('Batman') but I need to be able to combine several properties to create a new array element ('Batman (Wayne, Bruce)). I tried $scope.heroList = _.pluck($scope.heroes, 'name' + '(' + 'lname' + ', ' + 'fname' + ')' ); but got all nulls. Here is a plunker. I need a final array that looks like this: $scope.heroList = ['Batman (Wayne, Bruce]',

问题 I'm trying to use lodash with the syntax "import * as includes from 'lodash.includes';" so i don't need to install all lodash library and just the functions that I need. Everything works fine but aot. I build my library to use it in other project as a node_modules and when I do ng serve everything works fine but when doing ng serve --aot I got: "Module not found: Error: Can't resolve 'lodash.includes' in etc...". I could solve the problem by installing lodash in my library project and use it

问题 I was wondering what was the most concise way to get an array of a certain size, of unique random numbers. I get random numbers like this: times(4, () => random(30, 95)); However this is not unique. I can filter this with uniq but I need to gurantee length of 4 of array. And I want to do it the lodash way. Any ideas? 回答1: I know this isn't "the lodash way", but it guarantees uniqueness, and allows you to use the same arguments as you were using before. It also scales better than methods that

问题 I'm trying to discover best practices for building a library and looking through famous library code. I looked at lodash and saw that the build scripts all reference a lib directory that doesn't exist. If I clone this repository, how can it build if these files don't exist in the repository? 回答1: We used to use lodash-cli to modularize and bundle individual method packages. However, in v5 we'll stick to a single modular package. Reference 来源： https://stackoverflow.com/questions/46440450/how

问题 I'm banging my head against a well trying to do the following with lodash. I have an array of objects with more nested objects, which looks like this: [{ id: 123, name: 'John', summary1: { count: 3, sum: 10, }, summary2: { count: 10, sum: 20 }, }, ... ] I want to convert each element of this array into something like this: [{ id: 123, name: 'John', summary1_count: 3, summary1_sum: 10 summary2_count: 10, summary2_sum: 20, }, ... ] SO basically I want to "flatten" each element of the array, in

问题 The response from my http call is an array of company objects like this: response = [{ "name": "CompanyName1", "registrations": [ { "country": "en", "register": "registerType1", "amount": 2 }, { "country": "wa", "register": "registerType2", "amount": 1 },{ "country": "en", "register": "registerType1", "amount": 3 }, { "country": "sc", "register": "registerType3", "amount": 2 }, { "country": "wa", "register": "registerType3", "amount": 2 } ] }, { "name": "CompanyName2", "registrations": [ {

问题 I have 3 similar javascript objects. var gdp = { "city": city, "gdp": [], }; var income = { "city": city, "income": [], }; var uRate = { "city": city, "uRate": [], }; Where I have many cities (n=28), and [] is my data array of integers with uniform length for each: gdp, income, uRate . GOAL: Combine these into a single object for each city: var finalData = { "city": city, "gdp": [], "income": [], "uRate": [] } I've tried variations of the following. if ( ObjA.city == ObjB.city ) { Obj.city