lodash group by multiple columns

Example groupBy and sum of a column using Lodash 4.17.4. I guess this is an alternative. Here is an updated version using lodash 4 and ES6. ACADEMIC CBSE Syllabus Learn Accounting Basics Auditing Course on Computer Concepts (CCC) Tutorial Learn Financial Accounting Learn Forex Trading Learn Statistics COMPUTER SCIENCE Adaptive Software Development Learn Agile Methodology Learn Agile Data Science Learn Artificial Intelligence Learn Computer Programming Inter Process Communication Learn C by Examples Learn … Grouping the players array: _.groupBy(players, "team");. Of course you can use this code multiple times. I found myself using the same array methods over and over to get this work done–Map, Filter and Reduce. Closed yesterday. February 6, 2018 It is not currently accepting answers. Many lodash methods are guarded to work as iteratees for methods like _.reduce, You can use chain to wrap an array, then call other Underscore functions on it. With toString there are several problems: Tibos: you're right, that's a bug waiting to happen. In the following example, the calendar grouping strategy is used with the Grid Layout to present a data set in a form of a calendar. It might not be a code solution, but right now you don't have any explanation for, Grouping elements in array by multiple properties. can anyone help me what's wrong in my code. Lately, I’ve been working on an exciting data visualization project for one of our clients. I have this sample data returned from an API. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Another way to do it is to use _lodash.groupBy or _lodash.keyBy: You will only have to write few lines of code to achieve same result: This will group your results by last name. multi-level-group-by.test.js. javascript – How to get relative image coordinate of this div? I believe in this way you will get shorter, more maintainable code with clear functions. It still looks a little ugly to me. I’m using Lodash’s _.groupBy to convert the data into an object I can use better. =). have them as columns). Creates an array of elements split into groups the length of size.If array can't be split evenly, the final chunk will be the remaining elements. Sort ascending vs. descending. ...that has multiple rows with the same name, title, and id, but different values for the 3 number columns (int_column, dec_column1, dec_column2). Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor. If I group this elements by lastname and age, I will get this result: After some experimentation, I came to the following solution: This solution works, but is this a right and best way? I am a Front-end Developer, graduate of Information Technology, and founder of w3tweaks.com. @AlexeyLebedev vey brilliant solution! The most useful part of lodash here is pick, which allows you to selectively slice out some properties of an object by name. Axis to be sorted. table.id table.datestamp table.field1 table.field2 There should be no duplicate record with the same field1 + 2 compound value in the last month. my code