深拷贝

deepCopy.js

function deepCopy(p, c) {
  c = c || {};
  for (var i in p) {
    if (p.hasOwnProperty(i)) {
      if (typeof p[i] === 'object') {
        c[i] = Array.isArray(p[i]) ? [] : {};
        deepCopy(p[i], c[i]);
      } else {
        c[i] = p[i];
      }
    }
  }
  return c;
}