JavaScript - Math.min() method example

The Math.min() function returns the smallest number from given numbers.

// ONLINE-RUNNER:browser;
var min = Math.min(2, 5);
console.log(min); // 2

console.log( Math.min(1) ); // 1
console.log( Math.min(1, 2) ); // 1
console.log( Math.min(1, 2, 3) ); // 1
console.log( Math.min(3, 25, -6, 0) ); // -6

console.log( Math.min(-5, -2, -7) ); // -7
console.log( Math.min(2, 1, NaN) ); // NaN
console.log( Math.min() ); // -Infinity

Math.min() function usage with an array in ES5 and ES6 example:

// ONLINE-RUNNER:browser;

var array = [7, 10, 5, 8];

// In ES5
console.log(Math.min.apply(Math, array)); // 5

// In ES6 - Spread Operator (...) has  been introduced 
console.log(Math.min(...array)); // 5
console.log(Math.min(100, ...array, 120, ...[151, 152])); // 5

1. Documentation

2. Getting min value from array examples

2.1. With Array reduce method example

This approach uses reduce method to find the minimum value inside an array. By making small modifications of Math.min(a, b) instruction we are able to find minimal value inside properties of a and b variables.

// ONLINE-RUNNER:browser;

var array = [1, 2, 3];

var result = array.reduce(function(a, b) {
    return Math.min(a, b);
});

console.log(result); // 1

2.2. Recurrent min method example

This approach uses recurrence to find the minimum value inside the array or nested arrays.

// ONLINE-RUNNER:browser;

function findMin() {
    function checkEntry(entry) {
        if (entry instanceof Array) {
            return findMin.apply(null, entry);
        }
        return entry;
    }
    if (arguments.length > 0) {
        var result = checkEntry(arguments[0]);
        for (var i = 1; i < arguments.length; ++i) {
            var value = checkEntry(arguments[i]);
            if (value < result) {
                result = value;
            }
        }
        return result;
    }
    return NaN;
}

console.log(findMin(1, 2, 3, [4, 5, 6],[7, 8, [9, 10]])); // 1

References

1. Maxima and minima - Wikipedia