lodash

问题 I have an array with multiple objects. In this array each objects having two or more sub objects. I want to get together all sub objects into an array of data. How to do with javascript? var array1 = [ { "dfgasg24":{ name:"a", id:1 }, "dfgare24":{ name:"b", id:2 } }, { "wegasg24":{ name:"ab", id:76 }, "yugasg24":{ name:"bc", id:34 }, "yugasg26":{ name:"dc", id:45 } } ] The output which i want to be like this, var result = [ { name:"a", id:1 }, { name:"b", id:2 }, { name:"ab", id:76 }, { name:

问题 I have an array of objects like this - say testArray. I need to check that for each object in array, if any of the saveNumbers array is empty, my function should return false. My function is as follows: public checkSaveNumbers(): boolean { let result; if (this.testArray) { result = _.some(this.testArray, member => !member.saveNumbers.length); } console.log(result); } Here, result is showing true for my above object where we can see that the first element in the array has saveNumbers array

问题 var original = { "8": [{ "temp": { "a": 1 }, "algo_id": 1 }, { "temp": { "a": 2 }, "algo_id": 101 } ], "13": { "temp": { "temp1": [1, 2] }, "algo_id": 2 } }; const values = _.values(original); const temp = _.map(values, (v) => { if (_.isArray(v)) { return _.mapValues(_.keyBy(v, 'algo_id'), a => _.pick(a, 'temp')); } }); console.log(temp); .as-console-wrapper { top: 0; max-height: 100% !important; } <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

问题 is there any way to specify which array item to keep based on a key being non-empty. it seems uniq just keeps the first occurrence. e.g: var fruits = [ {'fruit': 'apples', 'location': '', 'quality': 'bad'}, {'fruit': 'apples', 'location': 'kitchen', 'quality': 'good'}, {'fruit': 'pears', 'location': 'kitchen', 'quality': 'excellent'}, {'fruit': 'oranges', 'location': 'kitchen', 'quality': ''} ]; console.log(_.uniq(fruits, 'fruit')); /* output is: Object { fruit="apples", quality="bad",

问题 I have an array which has different level of approvers. I need to combine the object of similar level and group them with the Name+counter. "APPROVERS": [ { "LEVEL": "L5", "EMAIL": "FTEST@TEST.COM", "FULLNAME": "FNAME", "POSITION": "FPOS", "SLA": "48", "STATUS": "INITIAL" }, { "LEVEL": "L4", "EMAIL": "JTEST@TEST.COM", "FULLNAME": "JNAME", "POSITION": "JPOS", "SLA": "48", "STATUS": "INITIAL" }, { "LEVEL": "L5", "EMAIL": "LTEST@TEST.COM", "FULLNAME": "LNAME", "POSITION": "GPOS", "SLA": "48",

问题 I have an array of strings which have been split like so: var searchValue = "600-800, 123, 180"; var groups = searchValue.split(","); // => ["600-800", " 123", " 180"] (so there is potentially whitespace around the items) and I would like to remove the whitespace. I know that I can use Array.prototype.map with String.prototype.trim , but I would like a solution specifically using Lodash. According to the docs, I should be able to say: _.map([' foo ', ' bar '], _.trim); and it will return [

问题 My team is evaluating switching some of our files to TypeScript from JavaScript, and we make extensive use of some custom mixin methods in our code. From doing some basic tests, it seems that while we can use _.mixin to create mixins as per the norm, we cannot reference them without getting a compilation error. Of course, we could put these references in the definition file, but I usually prefer not to modify that. Is there any way to do what we're looking for, or are we out of luck? 回答1: You

问题 I have a javascript variable a and a variable b that can have a value of 0 or 1. Can anyone suggest how I could code a function so b could depend on the value of a like this: When a changes from 0 to 1 - if a is 1 for more than 500ms then b is set to 1 When a changes from 1 to 0 - b is set to 0 immediately If there's a way to code this using a function then could that be attached to the variable a's setter ? 回答1: If you can, wrap the access with defineProperty : var obj = { _a: 1 }; Object

问题 var json = [{ "city": "California", "name": "Joe", "age": 17, "type",:"custom" }, { "city": "California", "name": "Bob", "age": 17, "type",:"predefined" }, { "city": "California", "name": "Bob", "age": 35, "type",:"custom" }, { "city": "Texas", "name": "Bob", "age": 35, "type",:"custom" }, { "city": "Florida", "name": "Bob", "age": 35, "type",:"predefined" }]; I have above array and i have to construct object, based on "type" value i.e "predefined" or "custom" as below updatedjson = {

问题 Is the lodash flow function a real compose function, or is it something that looks like one, but is optimized to run fast and sacrifices the flexibility I'd expect? I expected flow to return a function I could curry, but instead it gave back a function that uses Javascript's arguments keyword. So curry can't tell that there are pending arguments, and it just gets invoked immediately. Working intuitively enough: var add = function(x, y) { return x + y }; var exclam = function(x) { return x