Javascript の for文のメモ

//01
var i,
    max,
    arr = ['a', 'b', 'c'];

for (i = 0; i < arr.length; i++) {
  console.log(arr[i]);
}
//-> a
//-> b
//-> c

//02
for (i = 0, max = arr.length; i < max; i++) {
  console.log(arr[i]);
}
//-> a
//-> b
//-> c

//03
for (i = arr.length; i--;) {
  console.log(arr[i]);
}
//-> c
//-> b
//-> a