javascriptvariable-declaration

Var Declarations in Javascript

I don't understand var a = [], i here. How can a be declared as both an array and whatever i's type is?

    // Source: Javascript: The Good Parts, p. 63
    Array.dim = function (dimension, initial) {
         var a = [], i;
         for(i = 0; i< dimension; i +=1)
         {
            a[i] = initial;   
         }
        return a;
    }
Solution

  • it means declare both (separately) - not declare them to be equal

    same thing as:

    var a = [];
var i;