let vs const as default, your opinion ? about array-explorer HOT 3 CLOSED

Honestly, there is zero advantage to using let over var if one is using the variable properly because it only changes the scope. Using it properly means explicitly setting objects to null after they are used in circumstances where a timer is used in the same scope to the effect of consoling the browser with, "It's okay, this object is gone and will not be 'eval'ed anymore, so it can truely be freed." On the other hand, const can be used dangerously to prevent yourself from force GC-ing a variable. Observe:

const k = new Array(1024 * 1024 * 16);
for (let i=1024 * 1024 * 16; i; i--) k[i] = 0.1 - i; 
setTimeout(function(){
    // k has not yet been released from memory be it may still be yet used
}, 100, "e", "k", "a", "l", "v", "2");

As seen below:

const k = new Array(1024 * 1024 * 16);
for (let i=1024 * 1024 * 16; i; i--) k[i] = 0.1 - i; 
setTimeout(function(e, k, a, l, v, _2){
  window[e + v + a + l + _2]( "console.log(typeof " + k + ");" );
},  100, "e", "k", "a", "l", "v", "2");
setTimeout(function(e, k, a, l, v, _2){
  window[e + v + a + l + _2] =  window[e + v + a + l];
}, 20,  "e", "k", "a", "l", "v", "2");

Therefore, one must degrade themself to a self inflicted insanity of the human person which transgresses all human rights and violates all dignities endowed within the nature of man and javascript.

var k = new Array(1024 * 1024 * 16);
for (let i=1024 * 1024 * 16; i; i--) k[i] = 0.1 - i; 
setTimeout(function(e, k, a, l, v, _2){
  window[e + v + a + l + _2]( "console.log(typeof " + k + ");" );
},  100, "e", "k", "a", "l", "v", "2");
setTimeout(function(e, k, a, l, v, _2){
  window[e + v + a + l + _2] =  window[e + v + a + l];
}, 20,  "e", "k", "a", "l", "v", "2");
k = null; // necessary insanity thrust upon us by the common enemy living and walking amongst: OOP

from array-explorer.

@anonyco I'll know I mastered JavaScript when I'll understand your comment

from array-explorer.

IIRC (It's been a while since I made this), I used let because some of the methods mutate and so const wouldn't be permitted and I felt it was better to keep things consistent. I could have just let it be var I suppose. But that was the reasoning behind it. Open to more discussion about it.

from array-explorer.