i in array) {
%CreateDataProperty(deleted_elements, i - start_i, current);
}
}
} else {
var length = indices.length;
for (var k = 0; k < length; ++k) {
var key = indices[k];
if (key >= start_i) {
var current = array[key];
if (!IS_UNDEFINED(current)
关键词：Javascript伪数组是啥？javascript伪数组的容易介绍