lodash

问题 JSPerf says the native for loop is the fastest of all similar loop implementations. However, I tried a simple example here -https://jsbin.com/kivesopeqi/edit?html,js,output where _.each is way faster than the native for loop. Can someone help me understand why? Or point out something wrong with my example? 回答1: First you have to have to make sure that you don't compare apples and oranges. When I try the code, jsbin will stop the code in the middle because it thinks that there is an infinite

问题 While integrating google maps using angular-google-maps 2.3.1 with lodash 4.3.0 (Custom Build) , I am getting this error. From some links I got to know they have some issues in latest version but I am not able to find the exact reason behind this issue. 回答1: As I post in a comment, I had the same problem and I solved it downgrading lodash until version 3.8.0 . Not sure why version 4.x doesn't work properly at the moment. 来源： https://stackoverflow.com/questions/35298931/typeerror-includes-is

问题 Question, is _.fill(Array(4), []) equal to [[], [], [], []] ? Because _.isEqual(_.fill(Array(4), []), [[], [], [], []]) is true var test = [[], [], [], []]; test[0].push(1); console.log(test[0]); test[1].push(2); console.log(test[1]); test[2].push(3); console.log(test[2]); test[3].push(4); console.log(test[3]); returns [1] [2] [3] [4] which is I wanted, but var test = _.fill(Array(4), []); test[0].push(1); console.log(test[0]); test[1].push(2); console.log(test[1]); test[2].push(3); console

问题 I have the following collection: "items": [{ "id": 1, "title": "Montrachet", "imageUrl": "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg", "imageUrls": [ "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg", "http://media.riepenau.com/wines/17973_b.jpg", "http://lorempixel.com/400/400/food/3" ], "properties": [ {"description" : "Kırmızı Şaraplar Desc"}, {"region" :"Bordeaux"}, {"age": "16"}, {"producer" :"Kayra"}, {"grapeType":

问题 How to sort object of objects asc and desc using Lodash? For example i want to sort it by 'r' or 'd'. This is how my object looks like: 回答1: Place internal objects in array and use function sortBy() var users = [ { 'user': 'fred', 'age': 48 }, { 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }, { 'user': 'barney', 'age': 34 } ]; _.sortBy(users, function(o) { return o.user; }); // → objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]] console.log(users.reverse()

问题 I have some jquery in my view file where I want to take all of the values of the individual fields with the name, discoverySource . The solution thanks to some help from a stack user was to use the lodash module and then map the array into individual values to be appropriately used for my sequelize BulkCreate function. With my current post setup, the .map method correctly creates individual rows in my db based on the amount of fields filled in, but for some reason the values aren't being

问题 my goal is to be able to copy data from a table row to another table row. if the data from 2015 has not changed from 2016 the user needs a quick way of copying the values into the 2016 input fields. the models are dynamically created for these forms. the data you see in this image is assigned to a section. the input models are name 'price_min + section_id', price_max + section_id' , etc... the history model does not have the section_id added to the end of the model names. so there needs to be

问题 I have the following array of objects that I need to filter by _id using an array of _id values. var objects = [{ _account: "YzzrzBrO9OSzo6BXwAvVuL5dmMKMqkhOoEqeo", _id: "055z5gzVyVfzlBnEOqYvcoLL1ZgOWJhkrWMkv2" }, { _account: "YzzrzBrO9OSzo6BXwAvVuL5dmMKMqkhOoEqeo", _id: "LvvrvyrOGOS2e5yE0Bdki45Y1ndVlgfoZ2zoOp" }, { _account: "mjj9jp92z2fD1mLlpQYZI1gAd4q4LwTKmBNLz", _id: "rEEwENwnznCQvkm61wRziKlMRPqaYztnR4vn61" }, { _account: "AaaraZrLqLfzRYoAPlb6ujPELWVW4dTK4eJWj", _id:

问题 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.6/lodash.min.js"></script> <script> var topicData = []; //some data here var topicList = topicData.map((d) => { return d.topic; }) _.uniq(topicList); //not work, still the old array </script> I wonder whether I import the library wrong or something else. Any help is appreciated. 回答1: uniq returns a new array instead of mutating the existing one. From the docs: Creates a duplicate-free version of an array, using SameValueZero

问题 I have an array of complicated objects and arrays in javascript such as: var array = [ { "simpleProp": "some value" }, { "booleanProp": false }, { "arrayProp": [ { "prop1": "value1" }, { "prop2": { "prop22": "value22", "prop23": "value23" } }, { "prop3": "value3" }, { "booleanProp": true } ] } ]; I have to know if there is a property with defined value in my array, such as: function some(array, property, value) { //some logic here // return boolean }; That is, for my source array the result