lodash

问题 Does anyone have a working example of a (simple) ember-app project built using Ember-CLI that uses LoDash? (e.g.: I want to use lodash, _.someLodashFunc, in my Routes and Controllers). I haven't seen any thread / article on the web that gives clear, step-by-step explanation on how to do that. If possible with lodash v3.0.0 (and I'm using the latest ember-cli, v0.1.9). Thanks, Raka I found out how, you need to generate a custom build of lodash (the "lodash modern"). Use lodash-cli: https:/

问题 I would like to merge all objects in one array into one object, with a custom function. Using lodash's mergeWith works well: let a = [{a: [1,2]}, {a:[3,4]}, {a: [7,8]}] let b = mergeWith( a[0], ...a.slice(1), (objValue: any, srcValue: any) => { if (Array.isArray(objValue)) { return objValue.concat(srcValue); } }, ); console.log(b); // result: {a:[1,2,3,4,7,8]} This works fine but it seems wasteful to create an array copy just for that ( a.slice(1) ) - is there another way to pass that array

问题 I want to sort the following array of timestamps using lodash so the latest time stamp is first [3]. Code: let timestamps = ["2017-01-15T19:18:13.000Z", "2016-11-24T17:33:56.000Z", "2017-04-24T00:41:18.000Z", "2017-03-06T01:45:29.000Z", "2017-03-05T03:30:40.000Z"] const sorted = _.sortBy(timestamps); This does not work as i expect, i believe its sorting them but in asc order. 回答1: How to sort an array of timestamps using lodash This code is already sorting timestamps correctly using lodash:

问题 So I have an array of objects like that: var arr = [ {uid: 1, name: "bla", description: "cucu"}, {uid: 2, name: "smth else", description: "cucarecu"}, ] uid is unique id of the object in this array. I'm searching for the elegant way to modify the object if we have the object with the given uid, or add a new element, if the presented uid doesn't exist in the array. I imagine the function to be behave like that in js console: > addOrReplace(arr, {uid: 1, name: 'changed name', description:

问题 So I have an array of objects like that: var arr = [ {uid: 1, name: "bla", description: "cucu"}, {uid: 2, name: "smth else", description: "cucarecu"}, ] uid is unique id of the object in this array. I'm searching for the elegant way to modify the object if we have the object with the given uid, or add a new element, if the presented uid doesn't exist in the array. I imagine the function to be behave like that in js console: > addOrReplace(arr, {uid: 1, name: 'changed name', description:

问题 So I have an array of objects like that: var arr = [ {uid: 1, name: "bla", description: "cucu"}, {uid: 2, name: "smth else", description: "cucarecu"}, ] uid is unique id of the object in this array. I'm searching for the elegant way to modify the object if we have the object with the given uid, or add a new element, if the presented uid doesn't exist in the array. I imagine the function to be behave like that in js console: > addOrReplace(arr, {uid: 1, name: 'changed name', description:

问题 I am trying to add an item to "roles array" based on a condition. My json: [{ "unitId": "2", name: "elizabeth", roles: [{ "role": { "roleId": "2", roleName: "testing" } }, { "role": { "roleId": "5", roleName: "dev" } }] }, { "unitId": "3", name: "peter", roles: [{ "role": { "roleId": "1", roleName: "testing" } }, { "role": { "roleId": "2", roleName: "dev" } }] } ] let newRole = { "role":{"roleId" : "6", roleName: "BA"}} Expected result: After adding the newRole to the roles array. [{ "unitId"

问题 I am trying to add an item to "roles array" based on a condition. My json: [{ "unitId": "2", name: "elizabeth", roles: [{ "role": { "roleId": "2", roleName: "testing" } }, { "role": { "roleId": "5", roleName: "dev" } }] }, { "unitId": "3", name: "peter", roles: [{ "role": { "roleId": "1", roleName: "testing" } }, { "role": { "roleId": "2", roleName: "dev" } }] } ] let newRole = { "role":{"roleId" : "6", roleName: "BA"}} Expected result: After adding the newRole to the roles array. [{ "unitId"

问题 I am trying to add an item to "roles array" based on a condition. My json: [{ "unitId": "2", name: "elizabeth", roles: [{ "role": { "roleId": "2", roleName: "testing" } }, { "role": { "roleId": "5", roleName: "dev" } }] }, { "unitId": "3", name: "peter", roles: [{ "role": { "roleId": "1", roleName: "testing" } }, { "role": { "roleId": "2", roleName: "dev" } }] } ] let newRole = { "role":{"roleId" : "6", roleName: "BA"}} Expected result: After adding the newRole to the roles array. [{ "unitId"

问题 I'm trying to find the easiest way to take an array that has like information and create an array with sub array. The newly created parent array should also sum the values that are found in the sub-array. This is the equivalent of an SQL statement that uses sum/group by. This is the original array [ { 'userId':1, 'userName':'bob', 'category':'shoes', 'count':2 }, { 'userId':1, 'userName':'bob', 'category':'rocks', 'count':4 }, { 'userId':1, 'userName':'bob', 'category':'bags', 'count':3 }, {