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following lodash error on build 'Cannot find name 'Exclude''

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问题 I am getting following lodash error ERROR in node_modules/@types/lodash/common/object.d.ts(1689,12): error TS2304: Cannot find name 'Exclude'. node_modules/@types/lodash/common/object.d.ts(1766,12): error TS2304: Cannot find name 'Exclude'. node_modules/@types/lodash/common/object.d.ts(1842,34): error TS2304: Cannot find name 'Exclude'. 回答1: There are recent updates on lodash typings reference : https://www.npmjs.com/package/@types/lodash Last updated: Mon, 04 Mar 2019 22:42:42 GMT changing "

How can I debounce using async/await?

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问题 I have an input box. After the user has stopped typing, I want to perform an HTTP request and await the results. Here's a jsbin Since network requests aren't allowed on jsbin, I've used setTimeout() instead. var log = console.log.bind(console) var delayedResults = new Promise(function(resolve) { setTimeout(function(){ resolve('Wooo I am the result!') }, 3000); }); document.querySelector('input').addEventListener('input', _.debounce(async function(){ log('Doing search') var result = await

(_.merge in ES6/ES7)Object.assign without overriding undefined values

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问题 There is _.merge functionality in lodash. I want to achieve the same thing in ES6 or ES7. Having this snippet: Object.assign({}, {key: 2}, {key: undefined}) I want to receive {key: 2} . Currently I receive {key: undefined} This is NOT a deep merge. Is it possible? If yes then how to achieve that? 回答1: You can't achieve that with a straight usage of Object.assign , because each next object will rewrite the same keys for prev merge. The only way, to filter your incoming objects with some hand

How to compare each object in an array with each other. When found update the object with a new property

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问题 For example consider the following array with objects. var collection = [{name:'user1',phone:'203'}, {name:'user2',phone:'5050'}, {name:'user1',phone:'203'}] Now I want to compare the each object with each other and give the result as. var newCollection = {name:'user1',phone:'203', rowMatch:'true'}, {name:'user2',phone:'5050', rowMatch:'false'}, {name:'user1',phone:'203',rowMatch:'true'} So, I want the new collecition like this where it compares and updates with new property when object

Lodash merge including undefined values

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问题 I'm trying to use Lodash to merge object A into object B, but the trouble I am having is that object A has some undefined values and I want these to be copied over to object B. Lodash docs for _.merge() says: "Recursively merges own enumerable properties of the source object(s), that don't resolve to undefined into the destination object." Is there another function that can do this, or can it be easily overwritten? EDIT A: Sample input: A = { name: "Bob Smith", job: "Racing Driver", address:

Deep Merge using Lodash

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问题 I have two arrays of objects that contain addresses that have a label and an object for the actual address: var originalAddresses = [ { label: 'home', address: { city: 'London', zipCode: '12345' } }, { label: 'work', address: { city: 'New York', zipCode: '54321' } } ]; var updatedAddresses = [ { label: 'home', address: { city: 'London (Central)', country: 'UK' } }, { label: 'spain', address: { city: 'Madrid', zipCode: '55555' } } ]; Now I want to merge these arrays by label and compare the

Sort items in array by more then one field with lodash

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问题 How can I sort an array of objects by more then one field using lodash. So for an array like this: [ {a: 'a', b: 2}, {a: 'a', b: 1}, {a: 'b', b: 5}, {a: 'a', b: 3}, ] I would expect this result [ {a: 'a', b: 1}, {a: 'a', b: 2}, {a: 'a', b: 3}, {a: 'b', b: 5}, ] 回答1: This is much easier in a current version of lodash (2.4.1). You can just do this: var data = [ {a: 'a', b: 2}, {a: 'a', b: 1}, {a: 'b', b: 5}, {a: 'a', b: 3}, ]; data = _.sortBy(data, ["a", "b"]); //key point: Passing in an array

Merge objects on shared Key Value Pair with Lodash

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问题 I have two arrays of objects weather and power that I would like to merge on the shared property date . Is there a way to do this with lodash? const weather = [ { date: 2, weather: 2 }, { date: 1, weather: 1 }, { date: 3, weather: 3 } ]; const power = [ { date: 1, power: 10 }, { date: 2, power: 20 }]; const merged = _.merge(weather, power); // <- This does not work as hoped for The expected output contains only the objects that have a matching date field (so the date: 3 object from the

Filtering json object by key value

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问题 I am trying to filter a json object by a user input. The user will select a number out of a drop down then I wish to filter my data and return it to them (through a d3 map). So What I am looking to do is pretty simple I think - but I'm not too sure how to do it in javascript. I have a change function for the select list where the user is selecting the number to filter by like so: $scope.slideChange = function(data){ //filter $scope.myData here by data } The json looks like so (with only one

flatten javascript array of objects

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I have an array of object with hierarchical structure, something like this: [ {name: 'ParentOne', children: [ {name: 'ParentOneChildOne'}, {name: 'ParentOneChildTwo', children: [ {name: 'ParentOneChildTwoGrandChildOne'}, ]}, ]}, {name: 'ParentTwo', children: [ {name: 'ParentTwoChildOne', children: [ {name: 'ParentTwoChildOneGrandChildOne'}, {name: 'ParentTwoChildOneGrandChildTwo'} ]}, {name: 'ParentTwoChildTwo'} ]} ]; I want to flatten it: [ {name: 'ParentOne'}, {name: 'ParentOneChildOne'}, {name: 'ParentOneChildTwo'}, {name: 'ParentOneChildTwoGrandChildOne'}, {name: 'ParentTwo'}, {name: