push() won't work as expected in reduce()

Question

Why doesn\'t a.push(b) work in my Array.reduce()? a=a.push(b) where b is a string, turns a to an integer.?!

Answer 1

Please note that this structure you provide is not clear enough

I would use instead an array of objects each having a name and a frecuency

var frequencies = [{name : "mats", frecuency : 1},
                   {name : "john", frecuency: 3},
                   {name : "johan", frecuency: 2},
                   {name : "jacob", frecuency: 3}];

Then you can use a filter operation and map to get what you need

var max = Math.max.apply(Math, frequencies.map(function(o){return o.frecuency;}));
var maxElems = frequencies.filter(function(a){return a.frecuency == max}).map(function(a){return a.name;});

maxElems will give you the names of the people with higher frecuency