CODEWITHSUNDEEP
javascriptarraysmathapplymin
mutsx
mutsx

Reputation: 23

JS: find lowest/highest number from array within a specific range

I have an array with a few nums:

var arr = ["10","14","23","2","21","17","72","16","73","52"];

I know I can use Math.min.apply(Math, arr) to get from an array the lowest number or use Math.max.apply(Math,arr) for the maximum number, but now I want only the minimum or maximum number from the last 3 elements in the array.

Any suggestions how I could do this?

Upvotes: 0

Views: 1693

Answers (1)

Mr. Polywhirl
Mr. Polywhirl

Reputation: 48600

Using Array.prototype.slice(), you can extract a range of values within an array. This will allow you to only perform the min() and max() function on the values within the designated range.

The minmax() function below will return an object with min and max values.

function minmax(arr, begin, end) {
    arr = [].slice.apply(arr, [].slice.call(arguments, 1));
    return {
        'min' : Math.min.apply(Math, arr),
        'max' : Math.max.apply(Math, arr)
    }
}

var values = ["10","14","23","2","21","17","72","16","73","52"];
var result = minmax(values, -3);

document.body.innerHTML = JSON.stringify(result, undefined, '    ');
body {
  font-family: monospace;
  white-space: pre;
}

Upvotes: 2

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