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?

Does this answer your question? Sort array of objects by string property value — Wyck
– Wyck, Commented Jul 14, 2021 at 15:18
@Wyck no, because in that example you know the key of the object property, in my case I need to search for this key based on the user input, which is the filterType variable — Bowis
– Bowis, Commented Jul 14, 2021 at 15:19
Are you looking for computed property names ? this.products.sort((a, b) => parseFloat(b[filterType]) - parseFloat(a[filterType])); — Tushar Shahi
– Tushar Shahi, Commented Jul 14, 2021 at 15:21

Sanket Shah · Accepted Answer · 2021-07-14 15:21:26Z

3

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

Does this answer your question?

answered Jul 14, 2021 at 15:21

Sanket Shah

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Comments

Nikola Pavicevic · Accepted Answer · 2022-05-21 06:53:26Z

1

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)

edited May 21, 2022 at 6:53

answered Jul 14, 2021 at 15:27

Nikola Pavicevic

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