mongodb group and sort by count code example

Example 1: group by count dataframe

df.groupby(['col1', 'col2']).size().reset_index(name='counts')

Example 2: group by in javascript

let group = cars.reduce((r, a) => { console.log("a", a); console.log('r', r); r[a.make] = [...r[a.make] || [], a]; return r;}, {});console.log("group", group);