How to get a specific value out of a JavaScript function?

Question

I have a simple code which returns the highest number value from an array.

const getMax = (data) => Object.entries(data).reduce((max, item) => max[1] > item[1] ? max : item);

var myData1 = { a: 1, b:2, c: 3};
var myData2 = { a: 4, b:2, c: 3};

console.log(getMax(myData1));
console.log(getMax(myData2));

Return result:

[ 'c', 3 ]
[ 'a', 4 ]

This whole function is important to run for other purposes, but please how would I specifically print the output of only first calculated value (so 'c' or 'a') and then print specifically output of the second value (so 3 or 4)?

Thank you.

Thanks Roberto. I don't know how to mark your comment as an aswer, but this is what I needed! — masch1na
– masch1na, Commented Jun 1, 2022 at 21:33
Why is this even a question? It returns an array, don't you know how to index array elements? — Barmar
– Barmar, Commented Jun 1, 2022 at 21:55

mykaf · Accepted Answer · 2022-06-01 21:34:29Z

1

A function can only return one value, whether simple or complex. You can store the complex value that a function returns, then use its individual simpler pieces:

const getMax = (data) => Object.entries(data).reduce((max, item) => max[1] > item[1] ? max : item);

var myData1 = { a: 1, b:2, c: 3};
var myData2 = { a: 4, b:2, c: 3};
var result1 = getMax(myData1);
var result2 = getMax(myData1);
var simple1_0 = result1[0];
var simple1_1 = result1[1];
var simple2_0 = result2[0];
var simple2_1 = result2[1];
console.log(simple1_0);
console.log(simple1_1);
console.log(simple2_0);
console.log(simple2_1);

answered Jun 1, 2022 at 21:34

mykaf

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