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filter multidimensional array javascript

var arr = [[7,3], [7,3], [3,8], [7,3], [7,3], [1,2]];

arr.map(JSON.stringify).reverse().filter((e, i, a) => a.indexOf(e, i+1) === -1).reverse().map(JSON.parse) // [[7,3], [3,8], [1,2]]
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