使用线性值访问JavaScript多维数组

Question

How could I set a variable that I can read by using eval('productOptionTree' + '[0][1][0]') ?

(the '[0][1][0]' part comes from another variable)

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UPDATE it's an ugly question, but I couldn't find another way to do it. the only answer I could find is:

newVal = 4;

dim = '[0][1][0]';

eval('productOptionTree'+dim+' = ' +newVal);

Answer 1

You don't need eval to read the item. Just do:

var x = productOptionTree[product[0]][product[1]][product[2]];

As you are free of eval, you can now easily use the same way to set the item:

productOptionTree[product[0]][product[1]][product[2]] = 42;