Exploring the concept of array manipulation in JavaScript brings us to an interesting scenario. Consider the array 'a' and the desire to swap the values of a[i] and a[a[i]] using destructuring assignment. Surprisingly, the code snippet intended for this purpose fails to produce the expected outcome:
a=[1,0]
[a[0],a[a[0]]]=[a[a[0]],a[0]]
console.log(a)//[1,0]
Curiously, substituting a[1] for a[a[0]] results in the desired swap. Why does this variation work as expected?
a=[1,0]
[a[0],a[1]]=[a[1],a[0]]
console.log(a)//[0,1]