Get a random int, character from a string, item from an array, key or value from an object, or any value between two given ints.

random.js

function random(a, b) { 
    if(Array.isArray(a)){
        return a[random(a.length)];
    } 
    if (typeof a === "object") {
        var key = random(Object.keys(a)); 
        return b === "key" ? key : b === "both" ? {key:key,value:a[key]} : a[key];
    }
    if (typeof a === "string" && !!a) {
        return (a.toLowerCase() === "bool") ? (Math.floor(Math.random()*2) == 1) : random(a.split(''));
    }
    if (typeof a === "number"){
        if(typeof b === "number"){
            return random(b-a)+a;
        } 
        return Math.floor(Math.random()*a);
    }
    return false;
};
/*
random(10) -> 9
random(10) -> 3

random(0,100) -> 48
random(0,100) -> 77

random("bool") -> true
random("bool") -> false

random("abcdefg") -> "e"
random("abcdefg") -> "a"

random(["hello", "hi", "hey"]) -> "hi"
random(["hello", "hi", "hey"]) -> "hey"

random({name:"Seth", friend: "Dan"}) -> "Dan"
random({name:"Seth", friend: "Dan"}) -> "Seth"

random({name:"Seth", friend: "Dan"}, "key") -> "name"
random({name:"Seth", friend: "Dan"}, "key") -> "friend"

random({name:"Seth", friend: "Dan"}, "both") -> {key:"name",value:"Seth"}
random({name:"Seth", friend: "Dan"}, "both") -> {key:"friend",value:"Dan"}

random("") -> false
random(undefined) -> false
random(false) -> false
*/