CODEWITHSUNDEEP
javascriptarraysnumbersmax
Daniel Bowen
Daniel Bowen

Reputation: 51

Javascript max value of array and find where it is?

javascript question here...

I need to find the highest number in an array and then return where in the array this number is. It cannot be sorted as this needs to match up with a word in another array. Heres the array:

var array1 = dan, john, james, harry, mike;
var array2 = 66, 33, 85, 34, 45;

Basically the number must match up with the name its already with. If anyone has the answer I would be most happy :)

Thanks

Upvotes: 3

Views: 3676

Answers (4)

Chris
Chris

Reputation: 156

You can read your array into a loop. If the number read is higher than the previous one, store it into a variable, with a second variable for its index.

At the end you'll have the max of your array and its index.

Upvotes: 0

jcubic
jcubic

Reputation: 66490

here is search script:

var array1 = ['dan', 'john', 'james', 'harry', 'mike'];
var array2 = [66, 33, 85, 34, 45];
var max = array2.length-1;
for (var i=array2.length-1; i--;) {
   if (array2[i] > array[max]) {
      max = i;
   }
}
alert(array1[max]);

Upvotes: 2

PSR
PSR

Reputation: 40318

   var array1 = dan, john, james, harry, mike;


  Array.max = function( array ){
        return array1.indexOf(Math.max.apply( Math, array ));
    };

Upvotes: 0

jAndy
jAndy

Reputation: 236022

var array1    = [ 'dan', 'john', 'james', 'harry', 'mike' ],
    array2    = [ 66, 33, 85, 34, 45 ],
    maxPos    = Math.max.apply( null, array2 ),
    posInArr  = array2.indexOf( maxPos );

console.log( array1[ posInArr ] );  // 'james'

The above code demonstrates the usage of Math.max() and Array.prototype.indexOf() to get the highest number within array2 and then find the index of that number in that array.

Upvotes: 5

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