Sort array of objects based on string parameter

Question

I have the following array of objects:

 [ { "id" : 1, "pricePerDay" : 50, }, { "id" : 2, "pricePerDay" : 70 } ] 

Based on the user input from a i want to filter either ASC or DESC on the pricePerday. Obviously this would work with:

 this.products.sort((a, b) => parseFloat(b.pricePerDay) - parseFloat(a.pricePerDay)); 

BUT i have the variable filterType which now contains the string 'pricePerDay'. How can I use this variable to search the array of objects to properties that have the same key and sort this array based on that key?

Answer 1

this.products.sort((a, b) => parseFloat(b[filterType]) - parseFloat(a[filterType])); 

Does this answer your question?

Answer 2

You can change filterType to field that you want and acs to false if you want desc order

 const arr = [ { "id" : 1, "pricePerDay" : 50, }, { "id" : 2, "pricePerDay" : 70 } ] let filterType = 'pricePerDay' let asc = false const res = arr.sort((a, b) => { if (asc) { return parseFloat(a[filterType]) - parseFloat(b[filterType]) } else { return parseFloat(b[filterType]) - parseFloat(a[filterType]) } }); console.log(res)