Concise object filter to array of objects

March 24, 2022

I want to filter an objects key/value pairs to an array of objects by value, whats the most concise way to do this?

input data

{
    a: 0
    b: 0
    c: 2
    d: 1
}

output data based on any value that is not 0

[
{name:"c", value:2},
{name:"d", value:1}
]

>Solution :

here is a solution using filter and map on the object entries. First I filter out the entries without value 0 after that I map through the result array and return in the format you want

let a = {    a: 0,    b: 0,    c: 2,    d: 1}

let r = Object.entries(a).filter(([k,v]) => v!==0).map(([name,value])=>({name,value}))

console.log(r)

and a solution using reduce
here I’m checking if the value is 0 inside the loop and adding to the accumulator if it is not.

let a = {a: 0,b: 0,c: 2,d: 1}

let r = Object.entries(a).reduce((acc,[name,value]) => {
    if(value !==0)acc.push({name,value})
  return acc
},[])

console.log(r)