Can I do this with JS array?

I want to create an array called currentArray, but I want its contents to be made up from a different array. Basically a copy. However, I want to affect which array is being copied into currentArray with a variable (int).

Here's what I mean:

function region(number)
{
        var regionArray1 = [1093, 1276, 436, 541];
        var regionArray2 = [563, 747, 310, 423, 744, 947, 601, 715];

        var currentArray = (regionArray+number)[]; 
}

---

number will be either 1 or 2. What is the correct way to do this, if I can? I've also 开发者_JAVA百科tried var currentArray = ("regionArray"+number)[]; but that doesn't seem to be the right way either.

---

The "best" way would be to make regionArray an array of arrays (or an Object of arrays):

function region(number)
{
    var regionArray = {
                        "1": [1093, 1276, 436, 541], 
                        "2": [563, 747, 310, 423, 744, 947, 601, 715]
                      };

    var currentArray = regionArray[number]; 
}

---

I would use a two dimensional array:

function region(number) {
    var regionArrays = [
        [1093, 1276, 436, 541],
        [563, 747, 310, 423, 744, 947, 601, 715]
    ];
    var currentArray = regionArrays[number - 1];

}

---

function region(i) {
    var regionArray = [
        [1093, 1276, 436, 541],
        [563, 747, 310, 423, 744, 947, 601, 715]
    ];

    var currentArray = regionArray[i];
}

---

You should use a switch/case. eval should not be used in cases where you know all the information that needs to be executed.

function region(n) {
    // define arrays ...
    switch(n) {
        case 1 : currentArray = regionArray1; break;
        case 2 : currentArray = regionArray3; break;
    }
}

If this extends to more than 2 you can have an array of arrays and simply assign currentArray = arrayChoices[n];

---

why not this :

function region(number)
{
        var regionArray = [];
        regionArray[0] = [1093, 1276, 436, 541];
        regionArray[1] = [563, 747, 310, 423, 744, 947, 601, 715];

        var currentArray = regionArray[ number ]; 
}