lodash

问题 My Json result from the API is as below Json result: "Issues": [{ "Id": null, "Key": null, "Values": [{ "Key": "Display Name", "Value": "Rya" }, { "Key": "UserName", "Value": "RH" }, { "Key": "Count", "Value": "350" } ] }, { "Id": null, "Key": null, "Values": [{ "Key": "Display Name", "Value": "Mike" }, { "Key": "UserName", "Value": "ML" }, { "Key": "Count", "Value": "90" } ] } ] I did a mapping by doing as below- .Issues.map(o => o.Values.reduce((acc, { Key, Value }) => (acc[Key] = Value,

问题 I am trying to merge two arrays into one. First one has default configuration and the second one has actual one. I found very similar problem here, but in my specific case it does not work. Default configuration: [ { configurationOption: 'X provisioning', platform: 'X', value: true }, { configurationOption: 'Y provisioning', platform: 'Y', value: true }, { configurationOption: 'Z provisioning', platform: 'Z', value: true } ] Actual configuration: [ { platform: 'X', value: false }, { platform:

问题 My existing array is as below: "Issues": [{ "Id": null, "Key": null, "Values": [{ "Key": "Display Name", "Value": "Rya" }, { "Key": "UserName", "Value": "RH" }, { "Key": "Count", "Value": "350" }] }, { "Id": null, "Key": null, "Values": [{ "Key": "Display Name", "Value": "Mike" }, { "Key": "UserName", "Value": "ML" }, { "Key": "Count", "Value": "90" }] }] My desired array: [{ name: 'Rya', value: 350 }, { name: 'Mike', value: 90 }] What I tried: Data.Issues.map(o=> o.Values.reduce((acc, {Key,

问题 I have following dataset: const input = [ { x: 1, y: 3 }, { y: 2, f: 7 }, { x: 2, z: 4 } ]; I need to sum all the array elements to get following result: const output = { f: 7, x: 3, y: 5, z: 4 }; I don't know the parameters names so we should not sore it anywhere. What is the shortest way to merge (sum properties) all the objects from the input array into one ? There is possibility to use ES6 features and lodash. 回答1: I guess this is the shortest possible solution: const input = [ { x: 1, y:

问题 I have nessted JSON look like this [ {arrivalTime: "10:30 PM" availableSeats: 23 boardingPoints: [{id: "3882" location: "abc" time: "02:30PM"},{id: "3882" location: "xyz" time: "02:30PM"}] busType: "Scania Metrolink" operatorName:"sham" commPCT: 8 departureTime: "1:15 PM" droppingPoints: [{id: "3882" location: "dex" time: "02:30PM"},{id: "3882" location: "afg" time: "02:30PM"}] }, {arrivalTime: "10:30 PM" availableSeats: 23 boardingPoints: [{id: "3882" location: "def" time: "02:30PM"},{id:

问题 I am trying to filter by child elements in lodash. I use firebase, which generates random keys for objects. The data structure here is like: contact: { name: My Name, events: { -fdhu9euwf9hud: { eventName: day 1 courseId: -3jfe2j09ej } -efdshkfhhiufd: { eventName: day 2 courseId: -3jfe2j09ej } -fh9238fh9duf2: { eventName: day 1 courseId: -dvh89wdfhoiw } } } I am trying to find all people (and events) that belong to a certain course which will be passed in as searchCourseID. I just don't know

问题 I am having a hell of a time finding an answer to this one. I would like to have a hash in JavaScript, like so: const hash = { a: 'A', c: 'C', b: 'B' } and I would like to sort the object by the value , such that it might become: const hash = { a: 'A', b: 'B', c: 'C', } now, I realize that POJSOs don't guarantee the order of their keys, so I was thinking of using immutableJS or some object that will guarantee the order of the keys in the hash. so I am looking for something like: var newHash =

问题 This is the basic JavaScript for loop I'm trying to replace: for (var i=0; i<tickers.length; i++) { if (tickers[i].ticker === selectedTicker) { selectTicker('portfolio', tickers[i]); break; } } Here is the lodash version _.times((tickers.length), function() { if (tickers[i].ticker === selectedTicker) { selectTicker('portfolio', tickers[i]); return; } }); Obviously this errors out currently, because there is no [i] variable set in the lodash version. The lodash version is much more readable

问题 I have array with following structure: var topics = [ { "id": 1, "name": "topic title 1", "sub_categories": [ { "id": 1, "name": "category title 1", "indicators": [ { "id": 1, "name": "indicator 1", "sub_category_id": 1 }, { "id": 7, "name": "indicator 7 - foo", "sub_category_id": 1 } ] }, { "id": 6, "name": "category title 6", "indicators": [ { "id": 8, "name": "indicator 8", "sub_category_id": 6 } ] } ] }, { "id": 2, "name": "topic title 2", "sub_categories": [ { "id": 2, "name": "category

问题 I'm currently using the following: for (var i = 0; i < x.length; i++) if (x[i].id === userId) return x[i].name; This returns the user name. Is there a more efficient way to do this using Lo-Dash? Note that the id is unique so if found there's no need to check more. 回答1: Is there a more efficient way to do this using _lodash? No. You can't get much more efficient than a plain old native for loop. But you can do it in less code with lodash. You can use _.where (note that it returns a new array,