gistfile1.js

// Chrome pet peeve with console logging

var arr = [ ];
for (var i = 0; i < 3; i++) {
  arr.push(i);
  console.log('foo', arr);
}

/*
  Actual:
    (3) foo [0, 1, 2]
  
  Expected:
    foo [0]
    foo [0, 1]
    foo [0, 1, 2]
*/

From what I understand, collapsing occurs when statements are on the same line.

console.log(1); console.log(1) // shows "(2) 1"
// but
console.log(1);
console.log(1); // shows "1" followed by "1"

Ditto for when statements are in the loop (as they correspond to the same line number).

I don't know, man, still a little odd. Checkout that gist above. Also, try this (all one line):

var i=1,arr=[];arr.push(i);console.log(arr);arr.push(i);console.log(arr);