Jonathan Jonathan - 27 days ago 10
Javascript Question

What is the location of x and y

What is the location of x and y in this array:

var a = [ [1,2], [x], [3, [y]] ];


I'm a bit confused about the syntax here.

Would it be:

a[1] = x and a[2][1] = y?


Or does the introduction of a new set of square brackets mean we instead have:

a[1][0] = x and a[2][1][0] = y?

Answer

let's find out together ;)

var a = [ [1,2], [x], [3,[y]]];

if you write that line by line:

var a = [
  [1,2],   // new array with index 0 containing 1 and 2 => a[0][0] = 1 and a[0][1] = 2
  [x],     // new array with index 1 containing x => a[1][0] = x
  [3,[y]]  // new array with index 2 containing 3 and array containing y a[2][0] = 3 a[2][1][0] = y 
];

in other words, x = a[1][0]

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