根据其他对象的array属性对对象数组进行排序的最快方法

Question

I've got two objects arrays and both of them have columnId property. I want to make the order of the first object's array same as the order of the second.

I've tried this:

filtered = visibleColumns.filter(function(v) {
            return filtered.includes(v.colId);
        });

where filtered is my result array and visibleColumns is array which order I need, but it doesn't work.

example of arrays:

 filtered = [{ colId:1, title: 'col1', size: 10 }, { colId:2, title: 'col2', size: 10 }]; visibleColumns = [{ colId:2, visible: true }, { colId:1, visible: true }]; 

Answer 1

You could create a Map object which maps each colId from visibleColumns to it's index in the array. Get the index for each colId while sorting filtered

 const filtered = [{ colId: 1, title: "col1", size: 10 }, { colId: 2, title: "col2", size: 10 }], visibleColumns = [{ colId: 2, visible: true }, { colId: 1, visible: true }]; const order = new Map(visibleColumns.map((o, i) => [o.colId, i])) filtered.sort((a, b) => order.get(a.colId) - order.get(b.colId)) console.log(filtered) 

Answer 2

You could create an object with the wanted order and take a default value for unknown id for sorting them to bottom.

 var filtered = [{ colId: 1, title: 'col1', size: 10 }, { colId: 2, title: 'col2', size: 10 }], visibleColumns = [{ colId: 2, visible: true }, { colId: 1, visible: true }], order = visibleColumns.reduce((o, { colId }, i) => (o[colId] = i + 1, o), {}); filtered.sort((a, b) => (order[a.colId] || Infinity) - (order[b.colId] || Infinity)); console.log(filtered); 

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