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'use strict';
var ctx = require('./_ctx')
, $export = require('./_export')
, createDesc = require('./_property-desc')
, assign = require('./_object-assign')
, create = require('./_object-create')
, getPrototypeOf = require('./_object-gpo')
, getKeys = require('./_object-keys')
, dP = require('./_object-dp')
, keyOf = require('./_keyof')
, aFunction = require('./_a-function')
, forOf = require('./_for-of')
, isIterable = require('./core.is-iterable')
, $iterCreate = require('./_iter-create')
, step = require('./_iter-step')
, isObject = require('./_is-object')
, toIObject = require('./_to-iobject')
, DESCRIPTORS = require('./_descriptors')
, has = require('./_has');
// 0 -> Dict.forEach
// 1 -> Dict.map
// 2 -> Dict.filter
// 3 -> Dict.some
// 4 -> Dict.every
// 5 -> Dict.find
// 6 -> Dict.findKey
// 7 -> Dict.mapPairs
var createDictMethod = function(TYPE){
var IS_MAP = TYPE == 1
, IS_EVERY = TYPE == 4;
return function(object, callbackfn, that /* = undefined */){
var f = ctx(callbackfn, that, 3)
, O = toIObject(object)
, result = IS_MAP || TYPE == 7 || TYPE == 2
? new (typeof this == 'function' ? this : Dict) : undefined
, key, val, res;
for(key in O)if(has(O, key)){
val = O[key];
res = f(val, key, object);
if(TYPE){
if(IS_MAP)result[key] = res; // map
else if(res)switch(TYPE){
case 2: result[key] = val; break; // filter
case 3: return true; // some
case 5: return val; // find
case 6: return key; // findKey
case 7: result[res[0]] = res[1]; // mapPairs
} else if(IS_EVERY)return false; // every
}
}
return TYPE == 3 || IS_EVERY ? IS_EVERY : result;
};
};
var findKey = createDictMethod(6);
var createDictIter = function(kind){
return function(it){
return new DictIterator(it, kind);
};
};
var DictIterator = function(iterated, kind){
this._t = toIObject(iterated); // target
this._a = getKeys(iterated); // keys
this._i = 0; // next index
this._k = kind; // kind
};
$iterCreate(DictIterator, 'Dict', function(){
var that = this
, O = that._t
, keys = that._a
, kind = that._k
, key;
do {
if(that._i >= keys.length){
that._t = undefined;
return step(1);
}
} while(!has(O, key = keys[that._i++]));
if(kind == 'keys' )return step(0, key);
if(kind == 'values')return step(0, O[key]);
return step(0, [key, O[key]]);
});
function Dict(iterable){
var dict = create(null);
if(iterable != undefined){
if(isIterable(iterable)){
forOf(iterable, true, function(key, value){
dict[key] = value;
});
} else assign(dict, iterable);
}
return dict;
}
Dict.prototype = null;
function reduce(object, mapfn, init){
aFunction(mapfn);
var O = toIObject(object)
, keys = getKeys(O)
, length = keys.length
, i = 0
, memo, key;
if(arguments.length < 3){
if(!length)throw TypeError('Reduce of empty object with no initial value');
memo = O[keys[i++]];
} else memo = Object(init);
while(length > i)if(has(O, key = keys[i++])){
memo = mapfn(memo, O[key], key, object);
}
return memo;
}
function includes(object, el){
return (el == el ? keyOf(object, el) : findKey(object, function(it){
return it != it;
})) !== undefined;
}
function get(object, key){
if(has(object, key))return object[key];
}
function set(object, key, value){
if(DESCRIPTORS && key in Object)dP.f(object, key, createDesc(0, value));
else object[key] = value;
return object;
}
function isDict(it){
return isObject(it) && getPrototypeOf(it) === Dict.prototype;
}
$export($export.G + $export.F, {Dict: Dict});
$export($export.S, 'Dict', {
keys: createDictIter('keys'),
values: createDictIter('values'),
entries: createDictIter('entries'),
forEach: createDictMethod(0),
map: createDictMethod(1),
filter: createDictMethod(2),
some: createDictMethod(3),
every: createDictMethod(4),
find: createDictMethod(5),
findKey: findKey,
mapPairs: createDictMethod(7),
reduce: reduce,
keyOf: keyOf,
includes: includes,
has: has,
get: get,
set: set,
isDict: isDict
});
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