JS遍历数组及打印数组实例分析

// 遍历数组var dd = {'a' : '111111','b' : '222222','c' : '333333'}dd['d'] = ['444444','55555555'];// 遍历数组function scan_array(arr) {for(var key in arr) { // 这个是关键if(typeof(arr[key]) == 'array' || typeof(arr[key]) == 'object') {// 递归调用scan_array(arr[key]);} else {document.write(key + ' = ' + arr[key] + '<br>');}}}function successionPrint(str,num) {  num = parseInt(num);  var return_str = '';  for (var i = 1; i<=num; i++) {    return_str +=str;  }  return return_str;}function __debug(param, flag) {  if (!param || typeof(param) == 'number' || typeof(param) == 'string') {      return param;  }  var t = typeof(param) + '(/n';  flag = flag ? parseInt(flag) + 1 : 1;  for(var key in param) {    if(typeof(param[key]) == 'array' || typeof(param[key]) == 'object') {      var t_tmp = key + ' = ' + __debug(param[key],flag);      t += successionPrint('/t', flag) + t_tmp + '/n';    } else {        var t_tmp = key + ' = ' + param[key];        t += successionPrint('/t', flag) + t_tmp + '/n';      }    }  t = t + successionPrint('/t', flag-1) + ')';  return t;}function _debug(param) {  alert(__debug(param));}