We have the following code:
var strMethod = 'valueOf',
strProperty = 'length',
result;
When we execute the Snippet 1, result has a value of 1.
result = [44 + 22][strMethod]()[strProperty];
Because the precedence of operators, the execution workflow is: 44+22 -> returns 66 66 + [ ] -> returns [66] [66].valueOf() -> returns [66] [66].length -> returns 1
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When we execute the Snippet 2, result has a value of 0.
value = [44 + 22][strMethod][strProperty];
Because the precedence of operators and how native methods behaviours, the execution workflow is:
44+22 -> returns 66
66 + [ ] -> returns [66]
[66].valueOf -> returns function valueOf() { [native code] }
(function valueOf() { [native code] }).length -> returns 0
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