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01.Math.js
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01.Math.js
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/* * * * * * * * * * * * * * * * * * * * * *
* PALEO JS PT 1: THE MATH OBJECT *
* * * * * * * * * * * * * * * * * * * * * */
// The Math object has all sorts of useful methods that JavaScript
// programmers use every day, like `Math.sqrt` (square root) or
// `Math.random` (generates random number). But we're going paleo
// so you'll have to implement them manually.
/** MATH.ABS **/
// Our first function simply returns the absolute value of a number.
// To get you in the swing of things, I implemented it for you.
var abs = function(number) {
return number < 0 ? -number : number;
};
/** MATH.FLOOR **/
// This useful function takes a number and rounds it drops any decimal
// values by rounding down to the nearest integer.
// Example Usage:
// Math.floor(3.5); --> returns 3
var floor = function(number) {
};
/** MATH.POW **/
// JavaScript doesn't have an exponent operator, so you need `Math.pow`
// to raise a number to a power. Too bad you can't use that. The good
// news is you don't have to handle fractional exponents, only integers.
// Example Usage:
// Math.pow(2, 4); --> returns 16
var pow = function(base, exponent) {
};
/** MATH.MAX **/
// Normally this compares any number of numbers and returns the largest.
// Let's take it easy for now and make a version that just compares two.
// Example Usage:
// Math.max(17, 9); --> returns 17
var max = function(x, y) {
};
/** MATH.MIN **/
// I bet you can guess what this one is suppossed to do. This time, use
// the `arguments` keyword so that you can compare any number of inputs.
// Example Usage:
// Math.min(5, 7, 35, -7, 22); --> returns -7
var min = function() {
};