// File: random.js
// Author: Dave Reed
//
// This file contains several routines for generating random values.
// Source code is available at http://www.prenhall.com/reed
//////////////////////////////////////////////////////////////////////

function RandomNum(low, high)
// Given : low <= high
// Returns : a random number in the range [low, high)
{
    return Math.random()*(high-low) + low;
}

function RandomInt(low, high)
// Given : low <= high
// Returns : a random integer in the range [low, high]
{
    return Math.floor(Math.random()*(high-low+1)) + low;
}

function RandomChar(str)
// Given : str is a nonempty string
// Returns: a random character from the string
{
    return str.charAt(RandomInt(0, str.length-1));
}

function RandomOneOf(list)
// Given : list is a nonempty list (array)
// Returns: a random item from the list
{
    return list[RandomInt(0, list.length-1)];
}