qu1

var _data = {
  web_title : 'test_web_title',
  url : 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
  url_hash : '3335cf59a624847a6638ce19c2b98b02',
  comment_text : '<script>alert(123)</script>'
};
写一个算法，遍历_data，生成下面的结果.
Result:
{ web_title: 'test_web_title' }
-------
{ web_title: 'test_web_title',
  url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614' }
-------
{ web_title: 'test_web_title',
  url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
  url_hash: '3335cf59a624847a6638ce19c2b98b02' }
-------
{ web_title: 'test_web_title',
  url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
  url_hash: '3335cf59a624847a6638ce19c2b98b02',
  comment_text: '<script>alert(123)</script>' }
-------
{ url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614' }
-------
{ url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
  url_hash: '3335cf59a624847a6638ce19c2b98b02' }
-------
{ url: 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
  url_hash: '3335cf59a624847a6638ce19c2b98b02',
  comment_text: '<script>alert(123)</script>' }
-------
{ url_hash: '3335cf59a624847a6638ce19c2b98b02' }
-------
{ url_hash: '3335cf59a624847a6638ce19c2b98b02',
  comment_text: '<script>alert(123)</script>' }
-------
{ comment_text: '<script>alert(123)</script>' }
-------

  var _data = {
    web_title : 'test_web_title',
    url : 'http%3A%2F%2Fwww.demohour.com%2Fprojects%2F351614',
    url_hash : '3335cf59a624847a6638ce19c2b98b02',
    comment_text : '<script>alert(123)</script>'
  };
  var MAX = 4;
  for(var i=1; i<=MAX; i++){
    for(var j=i; j<=MAX; j++){
      var _post = {};
      var curt = 1;
      for(var key in _data){
        if(curt>=i && curt<=j){
          _post[key] = _data[key];
        }
        curt++;
      }
      console.log(_post);
      console.log('---------');
    }
  }