lodash

lodash - Count duplicate and then remove them

由 拥有回忆 提交于 2019-12-01 14:05:51
I am trying to use lodash to first count how many duplicates are in an array of objects and the remove the duplicate (keeping the counter). The code I have so far seem to work, but I canìt figure out how to merge the two (sorry, new with lodash). Here's some code: var array = [ {id: 1, name: "test"}, {id: 2, name: "test 2"}, {id: 3, name: "test 3"}, {id: 4, name: "test 4"}, {id: 1, name: "test "}, {id: 2, name: "test 2"}, ] // This finds the duplicates and removes them result = _.uniqBy(array, 'id') // this counts how many duplicates are in the array count = _(result) .groupBy('id') .map(

lodash - Count duplicate and then remove them

由 ￡可爱￡侵袭症＋ 提交于 2019-12-01 12:31:23
问题 I am trying to use lodash to first count how many duplicates are in an array of objects and the remove the duplicate (keeping the counter). The code I have so far seem to work, but I canìt figure out how to merge the two (sorry, new with lodash). Here's some code: var array = [ {id: 1, name: "test"}, {id: 2, name: "test 2"}, {id: 3, name: "test 3"}, {id: 4, name: "test 4"}, {id: 1, name: "test "}, {id: 2, name: "test 2"}, ] // This finds the duplicates and removes them result = _.uniqBy(array

Merge array of complex objects by using Lodash

由 我怕爱的太早我们不能终老 提交于 2019-12-01 10:45:58
I'm new to Lodash and trying to solve this problem but could find a good way to do it. I have an array of objects return back from the database. The data is structured as below: var data = [{ index: 1, Aoo: "a1", Boo: 'b2', }, { index: 1, Aoo: "a2", Boo: 'b2', }, { index: 2, Aoo: "a3", Boo: 'b3', }]; I want to first group the objects by index, then group the attribute "Aoo" and "Boo" and put it in an array attribute called param . var result = [{ index: 1, param: [{ Aoo: 'A1', Boo: 'B1' },{ Aoo: 'A2', Boo: 'B2', }] }, { index: 2, param: [{ Aoo: 'A3', Boo: 'B3' }] } ] I can do it manually but I

Lodash in angular2, declare var_:any not working

由 陌路散爱 提交于 2019-12-01 08:04:51
问题 I am using lodash in my angular2 app. by using declare var _: any; i am doing lodash operation such as _.findIndex(...) . Now i am facing one issue. sometimes while loading page i am getting error as below EXCEPTION: ReferenceError: _ is not defined how to avoid this? As my assumption, lodash code is executed before declare var _: any; 回答1: In fact, it depends on the way to configure / include the lodash library into your HTML page: Include the lodash.js file into a script element . This way,

Merge array of complex objects by using Lodash

由 走远了吗. 提交于 2019-12-01 07:39:51
问题 I'm new to Lodash and trying to solve this problem but could find a good way to do it. I have an array of objects return back from the database. The data is structured as below: var data = [{ index: 1, Aoo: "a1", Boo: 'b2', }, { index: 1, Aoo: "a2", Boo: 'b2', }, { index: 2, Aoo: "a3", Boo: 'b3', }]; I want to first group the objects by index, then group the attribute "Aoo" and "Boo" and put it in an array attribute called param . var result = [{ index: 1, param: [{ Aoo: 'A1', Boo: 'B1' },{

How should the lodash flow function be typed in typescript?

由 若如初见. 提交于 2019-12-01 05:04:30
lodash.flow combines two or more functions. lodash.flow(double, addTwo) would return a function the would double and add two. How should this function be typed in typescript (the current definition just returns Function)? declare function flow<In, Intermediate, Out>(f1: (a1: In) => Intermediate, f2: (a1: Intermediate) => Out): (a1: In)=> Out works for two functions with the first having one input argument. I'm not sure how to extend the definition to work in all cases. My attempt can support mulitple functions if called like this: lodash.flow(f1, lodash.flow(f2, f3)) but am looking for lodash

Converting lodash _.uniqBy() to native javascript

由 元气小坏坏 提交于 2019-12-01 05:02:59
问题 Here in this snippet i am stuck as in _.uniqBy(array,iteratee) ,this iteratee can be a function or a string at the same time Where to put the condition to check uniqness on the property because itratee function can be anything var sourceArray = [ { id: 1, name: 'bob' }, { id: 1, name: 'bill' }, { id: 1, name: 'bill' } , {id: 2,name: 'silly'}, {id: 2,name: 'billy'}] function uniqBy (inputArray, callback) { return inputArray.filter(callback) } var inputFunc = function (item) { return item.name

Is it possible to precisely type _.invert in TypeScript?

由 岁酱吖の 提交于 2019-12-01 05:01:31
问题 In lodash, the _.invert function inverts an object's keys and values: var object = { 'a': 'x', 'b': 'y', 'c': 'z' }; _.invert(object); // => { 'x': 'a', 'y': 'b', 'z': 'c' } The lodash typings currently declare this to always return a string → string mapping: _.invert(object); // type is _.Dictionary<string> But sometimes, especially if you're using a const assertion, a more precise type would be appropriate: const o = { a: 'x', b: 'y', } as const; // type is { readonly a: "x"; readonly b: "y

Lodash remove items recursively

由 情到浓时终转凉″ 提交于 2019-12-01 04:26:39
Given this JSON object, how does lodash remove the reach value from the objects? { total: 350, SN1: { reach: 200, engagementRate: 1.35 }, SN2: { reach: 150, engagementRate: 1.19 } } I've been trying to iteratively remove() it but I always get an undefined object in return so I'm positive I'm doing it wrong. This is also the first time I'm using lodash, so that might be the actual problem. Can anyone help? _.transform() the object to another object, and while passing the values to the new object, check if the value is an object and if it has the 'reach' property, and if so use _.omit() to get a

Sort Json Array with LoDash

由 你离开我真会死。 提交于 2019-12-01 04:04:15
I have a JSON array whose general structure is like this: var json = [ { key: 'firstName', value: 'Bill' }, { key: 'lastName', value: 'Mans' }, { key: 'phone', value: '123.456.7890' } ]; In reality, there will be a lot more key/value pairs. Either way, I'm trying to sort this array by the key value using Lodash . Currently, I'm trying the following: _.map(_.sortBy(json, key), _.values); However, that causes an error that says: [ReferenceError: key is not defined] I suspect its because key is not wrapped in quotes as shown in the docs . Unfortunately, I do not actually have control over the
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