如何根据传递给函数的参数更改变量名？

Question

I have a function called nameGenerator() that takes a variable, category , as a parameter.

Before this function is defined, I have two "pairs" of wordlist arrays: djentWords1 and djentWords2 , and then hardcoreWords1 and hardcoreWords2 .

nameGenerator() defines the following variables:

1. firstNum and secondNum
2. firstWord and secondWord
3. bandName

The function generates two random numbers ( firstNum and secondNum ) between 0 and the length of either djentWords1 & djentWords2 , or hardcoreWords1 & hardcoreWords2 . My question is: can I pass nameGenerator() a parameter like "djent" or "hardcore", and based on that parameter, have it use the appropriate array length to generate the random number? Here's the function as-is:

//First category: djent
var djentWords1 = ["Aman", "Soul", "Cloud", "Calculate", "Pythagoran"];
var djentWords2 = ["NaaKi", "Circlet", "Cykul", "Consciousness", "Daaka"];

//Second category: hardcore
var hardcoreWords1 = ["SMASH", "RAGE", "LIFE", "THESE", "FIRST", "BRASS", "LAST"];
var hardcoreWords2 = ["FIST", "FIGHTER", "BREAKER", "SMASHER", "RUINER", "DAYS", "CHANCE"];


function nameGenerator (category){
    //Randomize
    var firstNum = Math.floor(Math.random() * categoryWords1.length); //categoryWords1 would either be djentWords1 or hardcoreWords1, based on the parameter passed to the function
    var secondNum = Math.floor(Math.random() * categoryWords2.length); //categoryWords2 would either be djentWords2 or hardcoreWords2, based on the parameter passed to the function
    var firstWord = categoryWords1[firstNum]; //firstWord = the word whose position corresponds to the first randomly-generated number
    var secondWord = categoryWords2[secondNum]; //secondWord = the word whose position corresponds to the second randomly-generated number
    var bandName = firstWord + secondWord;
}

Thanks in advance - and hopefully this wasn't too confusing. All help is greatly appreciated.

Answer 1

Why not use an object (associative array)?

var words = {
    djent: [
        ["Aman","Soul","..."],
        ["NaaKi","Circlet","..."]
    ],
    hardcore: [
        ["..."],
        ["..."]
    ]
};
function nameGenerator(category) {
    var bandName = words[category][0][Math.floor(Math.random()*words[category][0].length)]
       + words[category][1][Math.floor(Math.random()*words[category][1].length)];
    return bandName;
}

Answer 2

you need to declare those variables as array attribute. try this :

var djent = {
    words1 : ["Aman", "Soul", "Cloud", "Calculate", "Pythagoran"],
    words2 : ["NaaKi", "Circlet", "Cykul", "Consciousness", "Daaka"]
}
var hardcore = {
    words1 : ["SMASH", "RAGE", "LIFE", "THESE", "FIRST", "BRASS", "LAST"],
    words2 : ["FIST", "FIGHTER", "BREAKER", "SMASHER", "RUINER", "DAYS", "CHANCE"]
}

function nameGenerator (category){
    var firstNum = Math.floor(Math.random() * window[category].words1.length)
       , secondNum = Math.floor(Math.random() * window[category].words2.length)
       , firstWord = window[category].words1[firstNum]
       , secondWord = window[category].words2[secondNum]
       , bandName = firstWord + secondWord;
    return bandName;
}