ドットつなぎのキーを使った連想配列を、深い階層の連想配列にする ref: http://qiita.com/kanemu@github/items/8d103877ddcefd0c0ebf

deepMapToMap.js

function deepMapToMap(map,tmpMap,suffixkey){
    if(suffixkey==null) suffixkey = '';
    if(tmpMap==null) tmpMap = {};
    for(var key in map){
        if(map[key].constructor.name==='Object'){
            deepMapToMap(map[key],tmpMap,suffixkey+key+'.');
        }else{
            tmpMap[suffixkey+key] = map[key];
        }
    }
    return tmpMap;
}

var map = {
  "kinpatch": {
    "name": "Tetsuya",
    "familyName": "Takeda"
  },
  "date": "2013-12-10"
};
var newMap = deepMapToMap(map);
console.log(JSON.stringify(newMap, undefined, 2));

mapToDeepMap.js

function makeMap(keyAry,value,tmpMap){
    var key = keyAry.shift();
    if(tmpMap[key]==null){
        tmpMap[key] = (keyAry.length)? makeMap(keyAry,value,{}): value;
    }else{
        if(tmpMap[key].constructor.name=='Object'){
            tmpMap[key] = makeMap(keyAry,value,tmpMap[key]);
        }
    }
    return tmpMap;
}

function mapToDeepMap(map){
    var newMap = {};
    for(var key in map){
        makeMap(key.split('.'),map[key],newMap);
    };
    return newMap;
}

var sampleMap = {
    "kinpatch.name":"Tetsuya",
    "kinpatch.familyName":"Takeda",
    "date":"2013-12-10"
};
var newMap = mapToDeepMap(sampleMap);
console.log(JSON.stringify(newMap, undefined, 2));