diff --git a/README.md b/README.md
index 18c338e8087b..a4fe2b185143 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,6 @@ core.setImmediate(core.log, 42);                // => 42
   - [Dict](#dict)
   - [Partial application](#partial-application)
   - [Date formatting](#date-formatting)
-  - [Array](#array)
   - [Number](#number)
   - [Escaping characters](#escaping-characters)
   - [delay](#delay)
@@ -1036,7 +1035,6 @@ Module `core.dict`. Based on [TC39 discuss](https://github.com/rwaldron/tc39-not
   .keyOf(object, var) -> key
   .includes(object, var) -> bool
   .reduce(object, fn(memo, val, key, @), memo?) -> var
-  .turn(object, fn(memo, val, key, @), memo = new @) -> memo
 ```
 `Dict` create object without prototype from iterable or simple object. [Example](http://goo.gl/pnp8Vr):
 ```javascript
@@ -1102,7 +1100,7 @@ Dict.set(O, '__proto__', {w: 2});
 O['__proto__']; // => {w: 2}
 O['w'];         // => undefined
 ```
-Other methods of `Dict` module are static equialents of `Array.prototype` methods for dictionaries, [examples](http://goo.gl/yARYXR):
+Other methods of `Dict` module are static equialents of `Array.prototype` methods for dictionaries, [examples](http://goo.gl/xFi1RH):
 ```javascript
 var dict = {a: 1, b: 2, c: 3};
 
@@ -1157,13 +1155,6 @@ Dict.reduce(dict, function(memo, it){
 Dict.reduce(dict, function(memo, it){
   return memo + it;
 }, ''); // => '123'
-
-Dict.turn(dict, function(memo, it, key){
-  memo[key + key] = it;
-});     // => {aa: 1, bb: 2, cc: 3}
-Dict.turn(dict, function(memo, it, key){
-  it % 2 && memo.push(key + it);
-}, []); // => ['a1', 'c3']
 ```
 ### Partial application
 Module `core.function.part`.
@@ -1234,23 +1225,6 @@ new Date().format('M Y');              // => 'Ноябрь 2014'
   months: 'Январ:я|ь,Феврал:я|ь,Март:а|,Апрел:я|ь,Ма:я|й,Июн:я|ь,Июл:я|ь,Август:а|,Сентябр:я|ь,Октябр:я|ь,Ноябр:я|ь,Декабр:я|ь'
 });
 ```
-### Array
-Module `core.array.turn`.
-```javascript
-Array
-  #turn(fn(memo, val, index, @), memo = []) -> memo
-```
-Method `Array#turn` reduce array to object, [example](http://goo.gl/zZbvq7):
-```javascript
-[1, 2, 3, 4, 5].turn(function(memo, it){
-  memo['key' + it] = !!(it % 2);
-}, {}); // => {key1: true, key2: false, key3: true, key4: false, key5: true}
-
-[1, 2, 3, 4, 5, 6, 7, 8, 9].turn(function(memo, it){
-  it % 2 && memo.push(it * it);
-  if(memo.length == 3)return false;
-}); // => [1, 9, 25]
-```
 ### Number
 Modules `core.number.iterator`.
 ```javascript
diff --git a/build/build.ls b/build/build.ls
index 9245c2e6fbc1..ce6e1dbaf49a 100644
--- a/build/build.ls
+++ b/build/build.ls
@@ -55,7 +55,6 @@ list = <[
   core.delay
   core.function.part
   core.object
-  core.array.turn
   core.number.iterator
   core.string.escape-html
   core.date
diff --git a/build/index.js b/build/index.js
index ef47d34d9fae..364c9a6f0b43 100644
--- a/build/index.js
+++ b/build/index.js
@@ -4,7 +4,7 @@
   banner = require('./config').banner;
   ref$ = require('fs'), readFile = ref$.readFile, writeFile = ref$.writeFile, unlink = ref$.unlink;
   webpack = require('webpack');
-  list = ['es5', 'es6.symbol', 'es6.object.assign', 'es6.object.is', 'es6.object.set-prototype-of', 'es6.object.to-string', 'es6.object.statics-accept-primitives', 'es6.function.name', 'es6.function.has-instance', 'es6.number.constructor', 'es6.number.statics', 'es6.math', 'es6.string.from-code-point', 'es6.string.raw', 'es6.string.iterator', 'es6.string.code-point-at', 'es6.string.ends-with', 'es6.string.includes', 'es6.string.repeat', 'es6.string.starts-with', 'es6.array.from', 'es6.array.of', 'es6.array.iterator', 'es6.array.species', 'es6.array.copy-within', 'es6.array.fill', 'es6.array.find', 'es6.array.find-index', 'es6.regexp', 'es6.promise', 'es6.map', 'es6.set', 'es6.weak-map', 'es6.weak-set', 'es6.reflect', 'es7.array.includes', 'es7.string.at', 'es7.string.lpad', 'es7.string.rpad', 'es7.regexp.escape', 'es7.object.get-own-property-descriptors', 'es7.object.to-array', 'es7.map.to-json', 'es7.set.to-json', 'es7.observable', 'web.immediate', 'web.dom.iterable', 'web.timers', 'core.dict', 'core.iter-helpers', 'core.$for', 'core.delay', 'core.function.part', 'core.object', 'core.array.turn', 'core.number.iterator', 'core.string.escape-html', 'core.date', 'core.global', 'core.log', 'js.array.statics'];
+  list = ['es5', 'es6.symbol', 'es6.object.assign', 'es6.object.is', 'es6.object.set-prototype-of', 'es6.object.to-string', 'es6.object.statics-accept-primitives', 'es6.function.name', 'es6.function.has-instance', 'es6.number.constructor', 'es6.number.statics', 'es6.math', 'es6.string.from-code-point', 'es6.string.raw', 'es6.string.iterator', 'es6.string.code-point-at', 'es6.string.ends-with', 'es6.string.includes', 'es6.string.repeat', 'es6.string.starts-with', 'es6.array.from', 'es6.array.of', 'es6.array.iterator', 'es6.array.species', 'es6.array.copy-within', 'es6.array.fill', 'es6.array.find', 'es6.array.find-index', 'es6.regexp', 'es6.promise', 'es6.map', 'es6.set', 'es6.weak-map', 'es6.weak-set', 'es6.reflect', 'es7.array.includes', 'es7.string.at', 'es7.string.lpad', 'es7.string.rpad', 'es7.regexp.escape', 'es7.object.get-own-property-descriptors', 'es7.object.to-array', 'es7.map.to-json', 'es7.set.to-json', 'es7.observable', 'web.immediate', 'web.dom.iterable', 'web.timers', 'core.dict', 'core.iter-helpers', 'core.$for', 'core.delay', 'core.function.part', 'core.object', 'core.number.iterator', 'core.string.escape-html', 'core.date', 'core.global', 'core.log', 'js.array.statics'];
   experimental = ['es7.observable'];
   libraryBlacklist = ['es6.object.to-string', 'es6.function.name', 'es6.regexp', 'es6.number.constructor'];
   module.exports = function(arg$, next){
diff --git a/core/index.js b/core/index.js
index 60898f6d99cb..3a4e557bffe5 100644
--- a/core/index.js
+++ b/core/index.js
@@ -4,7 +4,6 @@ require('../modules/core.$for');
 require('../modules/core.delay');
 require('../modules/core.function.part');
 require('../modules/core.object');
-require('../modules/core.array.turn');
 require('../modules/core.number.iterator');
 require('../modules/core.string.escape-html');
 require('../modules/core.date');
diff --git a/fn/array/index.js b/fn/array/index.js
index 6a92ab31ef72..06d045d28397 100644
--- a/fn/array/index.js
+++ b/fn/array/index.js
@@ -9,5 +9,4 @@ require('../../modules/es6.array.find');
 require('../../modules/es6.array.find-index');
 require('../../modules/es7.array.includes');
 require('../../modules/js.array.statics');
-require('../../modules/core.array.turn');
 module.exports = require('../../modules/$').core.Array;
\ No newline at end of file
diff --git a/index.js b/index.js
index 6b1cdb915a84..6338ce986223 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,6 @@ require('./modules/core.$for');
 require('./modules/core.delay');
 require('./modules/core.function.part');
 require('./modules/core.object');
-require('./modules/core.array.turn');
 require('./modules/core.number.iterator');
 require('./modules/core.string.escape-html');
 require('./modules/core.date');
diff --git a/library/core/index.js b/library/core/index.js
index 60898f6d99cb..3a4e557bffe5 100644
--- a/library/core/index.js
+++ b/library/core/index.js
@@ -4,7 +4,6 @@ require('../modules/core.$for');
 require('../modules/core.delay');
 require('../modules/core.function.part');
 require('../modules/core.object');
-require('../modules/core.array.turn');
 require('../modules/core.number.iterator');
 require('../modules/core.string.escape-html');
 require('../modules/core.date');
diff --git a/library/fn/array/index.js b/library/fn/array/index.js
index 6a92ab31ef72..06d045d28397 100644
--- a/library/fn/array/index.js
+++ b/library/fn/array/index.js
@@ -9,5 +9,4 @@ require('../../modules/es6.array.find');
 require('../../modules/es6.array.find-index');
 require('../../modules/es7.array.includes');
 require('../../modules/js.array.statics');
-require('../../modules/core.array.turn');
 module.exports = require('../../modules/$').core.Array;
\ No newline at end of file
diff --git a/library/index.js b/library/index.js
index 6b1cdb915a84..6338ce986223 100644
--- a/library/index.js
+++ b/library/index.js
@@ -5,7 +5,6 @@ require('./modules/core.$for');
 require('./modules/core.delay');
 require('./modules/core.function.part');
 require('./modules/core.object');
-require('./modules/core.array.turn');
 require('./modules/core.number.iterator');
 require('./modules/core.string.escape-html');
 require('./modules/core.date');
diff --git a/library/modules/core.dict.js b/library/modules/core.dict.js
index 78c6519fde66..9546ebe169d7 100644
--- a/library/modules/core.dict.js
+++ b/library/modules/core.dict.js
@@ -10,7 +10,8 @@ var $        = require('./$')
   , step     = $iter.step
   , getKeys  = $.getKeys
   , toObject = $.toObject
-  , has      = $.has;
+  , has      = $.has
+  , findKey  = createDictMethod(6);
 
 function Dict(iterable){
   var dict = $.create(null);
@@ -88,32 +89,36 @@ function createDictMethod(TYPE){
   };
 }
 
-// true  -> Dict.turn
-// false -> Dict.reduce
-function createDictReduce(IS_TURN){
-  return function(object, mapfn, init){
-    assert.fn(mapfn);
-    var O      = toObject(object)
-      , keys   = getKeys(O)
-      , length = keys.length
-      , i      = 0
-      , memo, key, result;
-    if(IS_TURN){
-      memo = init == undefined ? new (generic(this, Dict)) : Object(init);
-    } else if(arguments.length < 3){
-      assert(length, '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++])){
-      result = mapfn(memo, O[key], key, object);
-      if(IS_TURN){
-        if(result === false)break;
-      } else memo = result;
-    }
-    return memo;
-  };
+function reduce(object, mapfn, init){
+  assert.fn(mapfn);
+  var O      = toObject(object)
+    , keys   = getKeys(O)
+    , length = keys.length
+    , i      = 0
+    , memo, key;
+  if(arguments.length < 3){
+    assert(length, '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 isDict(it){
+  return $.isObject(it) && $.getProto(it) === Dict.prototype;
 }
-var findKey = createDictMethod(6);
 
 $def($def.G + $def.F, {Dict: Dict});
 
@@ -129,21 +134,11 @@ $def($def.S, 'Dict', {
   find:     createDictMethod(5),
   findKey:  findKey,
   mapPairs: createDictMethod(7),
-  reduce:   createDictReduce(false),
-  turn:     createDictReduce(true),
+  reduce:   reduce,
   keyOf:    keyOf,
-  includes: function(object, el){
-    return (el == el ? keyOf(object, el) : findKey(object, function(it){
-      return it != it;
-    })) !== undefined;
-  },
-  // Has / get / set own property
-  has: has,
-  get: function(object, key){
-    if(has(object, key))return object[key];
-  },
-  set: $.def,
-  isDict: function(it){
-    return $.isObject(it) && $.getProto(it) === Dict.prototype;
-  }
+  includes: includes,
+  has:      has,
+  get:      get,
+  set:      $.def,
+  isDict:   isDict
 });
\ No newline at end of file
diff --git a/library/modules/js.array.statics.js b/library/modules/js.array.statics.js
index 8efc2ca68a03..c67d3192da6c 100644
--- a/library/modules/js.array.statics.js
+++ b/library/modules/js.array.statics.js
@@ -12,5 +12,5 @@ function setStatics(keys, length){
 setStatics('pop,reverse,shift,keys,values,entries', 1);
 setStatics('indexOf,every,some,forEach,map,filter,find,findIndex,includes', 3);
 setStatics('join,slice,concat,push,splice,unshift,sort,lastIndexOf,' +
-           'reduce,reduceRight,copyWithin,fill,turn');
+           'reduce,reduceRight,copyWithin,fill');
 $def($def.S, 'Array', statics);
\ No newline at end of file
diff --git a/modules/core.dict.js b/modules/core.dict.js
index 78c6519fde66..9546ebe169d7 100644
--- a/modules/core.dict.js
+++ b/modules/core.dict.js
@@ -10,7 +10,8 @@ var $        = require('./$')
   , step     = $iter.step
   , getKeys  = $.getKeys
   , toObject = $.toObject
-  , has      = $.has;
+  , has      = $.has
+  , findKey  = createDictMethod(6);
 
 function Dict(iterable){
   var dict = $.create(null);
@@ -88,32 +89,36 @@ function createDictMethod(TYPE){
   };
 }
 
-// true  -> Dict.turn
-// false -> Dict.reduce
-function createDictReduce(IS_TURN){
-  return function(object, mapfn, init){
-    assert.fn(mapfn);
-    var O      = toObject(object)
-      , keys   = getKeys(O)
-      , length = keys.length
-      , i      = 0
-      , memo, key, result;
-    if(IS_TURN){
-      memo = init == undefined ? new (generic(this, Dict)) : Object(init);
-    } else if(arguments.length < 3){
-      assert(length, '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++])){
-      result = mapfn(memo, O[key], key, object);
-      if(IS_TURN){
-        if(result === false)break;
-      } else memo = result;
-    }
-    return memo;
-  };
+function reduce(object, mapfn, init){
+  assert.fn(mapfn);
+  var O      = toObject(object)
+    , keys   = getKeys(O)
+    , length = keys.length
+    , i      = 0
+    , memo, key;
+  if(arguments.length < 3){
+    assert(length, '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 isDict(it){
+  return $.isObject(it) && $.getProto(it) === Dict.prototype;
 }
-var findKey = createDictMethod(6);
 
 $def($def.G + $def.F, {Dict: Dict});
 
@@ -129,21 +134,11 @@ $def($def.S, 'Dict', {
   find:     createDictMethod(5),
   findKey:  findKey,
   mapPairs: createDictMethod(7),
-  reduce:   createDictReduce(false),
-  turn:     createDictReduce(true),
+  reduce:   reduce,
   keyOf:    keyOf,
-  includes: function(object, el){
-    return (el == el ? keyOf(object, el) : findKey(object, function(it){
-      return it != it;
-    })) !== undefined;
-  },
-  // Has / get / set own property
-  has: has,
-  get: function(object, key){
-    if(has(object, key))return object[key];
-  },
-  set: $.def,
-  isDict: function(it){
-    return $.isObject(it) && $.getProto(it) === Dict.prototype;
-  }
+  includes: includes,
+  has:      has,
+  get:      get,
+  set:      $.def,
+  isDict:   isDict
 });
\ No newline at end of file
diff --git a/modules/js.array.statics.js b/modules/js.array.statics.js
index 8efc2ca68a03..c67d3192da6c 100644
--- a/modules/js.array.statics.js
+++ b/modules/js.array.statics.js
@@ -12,5 +12,5 @@ function setStatics(keys, length){
 setStatics('pop,reverse,shift,keys,values,entries', 1);
 setStatics('indexOf,every,some,forEach,map,filter,find,findIndex,includes', 3);
 setStatics('join,slice,concat,push,splice,unshift,sort,lastIndexOf,' +
-           'reduce,reduceRight,copyWithin,fill,turn');
+           'reduce,reduceRight,copyWithin,fill');
 $def($def.S, 'Array', statics);
\ No newline at end of file
diff --git a/tests/commonjs.ls b/tests/commonjs.ls
index 65c167c8be7d..50908d221f87 100644
--- a/tests/commonjs.ls
+++ b/tests/commonjs.ls
@@ -40,7 +40,6 @@ for P in <[.. ../library]>
   ok Array.isArray require("#P/fn/array/of") \q \w \e
   ok \next of require("#P/fn/array/values")([])
   ok require("#P/fn/array/includes")([1 2 3], 2)
-  ok require("#P/fn/array/turn")([1, 2, 3], (-> it.q++), {q: 0}).q is 3
   ok typeof require("#P/fn/array/concat") is \function
   ok typeof require("#P/fn/array/every") is \function
   ok typeof require("#P/fn/array/filter") is \function
@@ -193,7 +192,6 @@ for P in <[.. ../library]>
   ok \setImmediate of require("#P/web")
   ok typeof require("#P/core/$for") is \function
   ok require("#P/core/_")
-  ok \turn of require("#P/core/array")
   ok \format of require("#P/core/date")
   ok typeof require("#P/core/delay") is \function
   ok typeof require("#P/core/dict") is \function
diff --git a/tests/tests-library.js b/tests/tests-library.js
index 622be0d20ffa..c21c25b0a163 100644
--- a/tests/tests-library.js
+++ b/tests/tests-library.js
@@ -141,32 +141,6 @@
   });
 }).call(this);
 
-// Generated by LiveScript 1.3.1
-(function(){
-  var isFunction, turn, toString$ = {}.toString;
-  QUnit.module('core-js Array#turn');
-  isFunction = function(it){
-    return toString$.call(it).slice(8, -1) === 'Function';
-  };
-  turn = core.Array.turn;
-  test('*', function(){
-    var arr, obj;
-    ok(isFunction(turn), 'Is function');
-    turn(arr = [1], function(memo, val, key, that){
-      deepEqual([], memo, 'Default memo is array');
-      ok(val === 1, 'First argumert is value');
-      ok(key === 0, 'Second argumert is index');
-      return ok(that === arr, 'Third argumert is array');
-    });
-    turn([1], function(memo){
-      return ok(memo === obj, 'Can reduce to exist object');
-    }, obj = {});
-    deepEqual([3, 2, 1], turn([1, 2, 3], function(memo, it){
-      return memo.unshift(it);
-    }), 'Reduce to object and return it');
-  });
-}).call(this);
-
 // Generated by LiveScript 1.3.1
 (function(){
   var isFunction, toString$ = {}.toString;
@@ -557,35 +531,6 @@
       return toString$.call(it).slice(8, -1) === 'String';
     }));
   });
-  test('.turn', function(){
-    var turn, obj;
-    turn = Dict.turn;
-    ok(isFunction(turn), 'Is function');
-    turn(obj = {
-      q: 1
-    }, function(memo, val, key, that){
-      deepEqual(memo, Dict());
-      ok(val === 1);
-      ok(key === 'q');
-      return ok(that === obj);
-    });
-    turn({
-      q: 1
-    }, function(it){
-      return ok(it === obj);
-    }, obj = {});
-    deepEqual(turn({
-      q: 1,
-      w: 2,
-      e: 3
-    }, function(memo, it){
-      return memo[it] = it;
-    }), Dict({
-      1: 1,
-      2: 2,
-      3: 3
-    }));
-  });
   test('.includes', function(){
     var includes, dict, o;
     includes = Dict.includes;
@@ -4836,7 +4781,7 @@
   slice = Array.prototype.slice;
   test('are functions', function(){
     var i$, x$, ref$, len$;
-    for (i$ = 0, len$ = (ref$ = ['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'slice', 'sort', 'splice', 'unshift', 'indexOf', 'lastIndexOf', 'every', 'some', 'forEach', 'map', 'filter', 'reduce', 'reduceRight', 'copyWithin', 'fill', 'find', 'findIndex', 'keys', 'values', 'entries', 'turn', 'includes']).length; i$ < len$; ++i$) {
+    for (i$ = 0, len$ = (ref$ = ['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'slice', 'sort', 'splice', 'unshift', 'indexOf', 'lastIndexOf', 'every', 'some', 'forEach', 'map', 'filter', 'reduce', 'reduceRight', 'copyWithin', 'fill', 'find', 'findIndex', 'keys', 'values', 'entries', 'includes']).length; i$ < len$; ++i$) {
       x$ = ref$[i$];
       ok(isFunction(core.Array[x$]), "Array." + x$ + " is function");
     }
@@ -5389,37 +5334,6 @@
       done: true
     });
   });
-  test('.turn', function(){
-    var turn, al, obj;
-    turn = core.Array.turn;
-    turn(al = function(){
-      return arguments;
-    }(1), function(memo, val, key, that){
-      deepEqual([], memo);
-      ok(val === 1);
-      ok(key === 0);
-      return ok(that === al);
-    });
-    turn(al = '1', function(memo, val, key, that){
-      deepEqual([], memo);
-      ok(val === '1');
-      ok(key === 0);
-      return ok(that == al);
-    });
-    turn(function(){
-      return arguments;
-    }(1), function(it){
-      return ok(it === obj);
-    }, obj = {});
-    deepEqual([3, 2, 1], turn(function(){
-      return arguments;
-    }(1, 2, 3), function(memo, it){
-      return memo.unshift(it);
-    }));
-    deepEqual(['3', '2', '1'], turn('123', function(memo, it){
-      return memo.unshift(it);
-    }));
-  });
   test('.includes', function(){
     var includes, args, o, str;
     includes = core.Array.includes;
diff --git a/tests/tests-library/core.array.turn.ls b/tests/tests-library/core.array.turn.ls
deleted file mode 100644
index 0d15c7b0f778..000000000000
--- a/tests/tests-library/core.array.turn.ls
+++ /dev/null
@@ -1,14 +0,0 @@
-QUnit.module 'core-js Array#turn'
-isFunction = -> typeof! it is \Function
-{turn} = core.Array
-test '*' !->
-  ok isFunction(turn), 'Is function'
-  turn arr = [1], (memo, val, key, that)->
-    deepEqual [] memo, 'Default memo is array'
-    ok val  is 1, 'First argumert is value'
-    ok key  is 0, 'Second argumert is index'
-    ok that is arr, 'Third argumert is array' 
-  turn [1], (memo)->
-    ok memo is obj, 'Can reduce to exist object'
-  , obj = {}
-  deepEqual [3 2 1], turn([1 2 3], (memo, it)-> memo.unshift it), 'Reduce to object and return it'
\ No newline at end of file
diff --git a/tests/tests-library/core.dict.ls b/tests/tests-library/core.dict.ls
index 0f9340f088d4..b01e11bf1076 100644
--- a/tests/tests-library/core.dict.ls
+++ b/tests/tests-library/core.dict.ls
@@ -144,18 +144,6 @@ test '.some' !->
   , ctx = {}
   ok not some {q:1 w:2 e:3} -> typeof! it is \String
   ok some {q:1 w:\2 e:3} -> typeof! it is \String
-test '.turn' !->
-  {turn} = Dict
-  ok isFunction(turn), 'Is function'
-  turn (obj = q: 1), (memo, val, key, that)->
-    deepEqual memo, Dict!
-    ok val  is 1
-    ok key  is \q
-    ok that is obj
-  turn {q:1} ->
-    ok it   is obj
-  , obj = {}
-  deepEqual turn({q:1 w:2 e:3} (memo, it)-> memo[it] = it), Dict {1:1 2:2 3:3}
 test '.includes' !->
   {includes} = Dict
   ok isFunction(includes), 'Is function'
diff --git a/tests/tests-library/js.array.statics.ls b/tests/tests-library/js.array.statics.ls
index 228e57ef4e79..1c40a577b53f 100644
--- a/tests/tests-library/js.array.statics.ls
+++ b/tests/tests-library/js.array.statics.ls
@@ -5,7 +5,7 @@ eq = strictEqual
 isFunction = -> typeof! it is \Function
 {slice} = Array::
 test 'are functions' !->
-  for <[concat join pop push reverse shift slice sort splice unshift indexOf lastIndexOf every some forEach map filter reduce reduceRight copyWithin fill find findIndex keys values entries turn includes]>
+  for <[concat join pop push reverse shift slice sort splice unshift indexOf lastIndexOf every some forEach map filter reduce reduceRight copyWithin fill find findIndex keys values entries includes]>
     ok isFunction(core.Array[..]), "Array.#{..} is function"
 test '.join' !->
   {join} = core.Array
@@ -242,23 +242,6 @@ test '.entries' !->
   deepEqual iter2.next!, {value: [1 \w], done: no}
   deepEqual iter2.next!, {value: [2 \e], done: no}
   deepEqual iter2.next!, {value: void, done: on}
-test '.turn' !->
-  {turn} = core.Array
-  turn (al = (->&)(1)), (memo, val, key, that)->
-    deepEqual [] memo
-    ok val  is 1
-    ok key  is 0
-    ok that is al
-  turn (al = \1), (memo, val, key, that)->
-    deepEqual [] memo
-    ok val is \1
-    ok key is 0
-    ok that ~= al
-  turn (->&)(1), ->
-    ok it is obj
-  , obj = {}
-  deepEqual [3 2 1], turn (->&)(1 2 3), ((memo, it)-> memo.unshift it)
-  deepEqual [\3 \2 \1], turn \123, ((memo, it)-> memo.unshift it)
 test '.includes' !->
   {includes} = core.Array
   ok isFunction(includes), 'Is function'
diff --git a/tests/tests.js b/tests/tests.js
index 75e82c3ac64e..beedbab16600 100644
--- a/tests/tests.js
+++ b/tests/tests.js
@@ -140,32 +140,6 @@
   });
 }).call(this);
 
-// Generated by LiveScript 1.3.1
-(function(){
-  var isFunction, toString$ = {}.toString;
-  QUnit.module('core-js Array#turn');
-  isFunction = function(it){
-    return toString$.call(it).slice(8, -1) === 'Function';
-  };
-  test('*', function(){
-    var arr, obj;
-    ok(isFunction(Array.prototype.turn), 'Is function');
-    (arr = [1]).turn(function(memo, val, key, that){
-      deepEqual([], memo, 'Default memo is array');
-      ok(val === 1, 'First argumert is value');
-      ok(key === 0, 'Second argumert is index');
-      return ok(that === arr, 'Third argumert is array');
-    });
-    [1].turn(function(memo){
-      return ok(memo === obj, 'Can reduce to exist object');
-    }, obj = {});
-    deepEqual([3, 2, 1], [1, 2, 3].turn(function(memo, it){
-      return memo.unshift(it);
-    }), 'Reduce to object and return it');
-    ok('turn' in Array.prototype[Symbol.unscopables], 'In Array#@@unscopables');
-  });
-}).call(this);
-
 // Generated by LiveScript 1.3.1
 (function(){
   var isFunction, toString$ = {}.toString;
@@ -552,35 +526,6 @@
       return toString$.call(it).slice(8, -1) === 'String';
     }));
   });
-  test('.turn', function(){
-    var turn, obj;
-    turn = Dict.turn;
-    ok(isFunction(turn), 'Is function');
-    turn(obj = {
-      q: 1
-    }, function(memo, val, key, that){
-      deepEqual(memo, Dict());
-      ok(val === 1);
-      ok(key === 'q');
-      return ok(that === obj);
-    });
-    turn({
-      q: 1
-    }, function(it){
-      return ok(it === obj);
-    }, obj = {});
-    deepEqual(turn({
-      q: 1,
-      w: 2,
-      e: 3
-    }, function(memo, it){
-      return memo[it] = it;
-    }), Dict({
-      1: 1,
-      2: 2,
-      3: 3
-    }));
-  });
   test('.includes', function(){
     var includes, dict, o;
     includes = Dict.includes;
@@ -5310,7 +5255,7 @@
   slice = Array.prototype.slice;
   test('are functions', function(){
     var i$, x$, ref$, len$;
-    for (i$ = 0, len$ = (ref$ = ['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'slice', 'sort', 'splice', 'unshift', 'indexOf', 'lastIndexOf', 'every', 'some', 'forEach', 'map', 'filter', 'reduce', 'reduceRight', 'copyWithin', 'fill', 'find', 'findIndex', 'keys', 'values', 'entries', 'turn', 'includes']).length; i$ < len$; ++i$) {
+    for (i$ = 0, len$ = (ref$ = ['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'slice', 'sort', 'splice', 'unshift', 'indexOf', 'lastIndexOf', 'every', 'some', 'forEach', 'map', 'filter', 'reduce', 'reduceRight', 'copyWithin', 'fill', 'find', 'findIndex', 'keys', 'values', 'entries', 'includes']).length; i$ < len$; ++i$) {
       x$ = ref$[i$];
       ok(isFunction(Array[x$]), "Array." + x$ + " is function");
     }
@@ -5863,37 +5808,6 @@
       done: true
     });
   });
-  test('.turn', function(){
-    var turn, al, obj;
-    turn = Array.turn;
-    turn(al = function(){
-      return arguments;
-    }(1), function(memo, val, key, that){
-      deepEqual([], memo);
-      ok(val === 1);
-      ok(key === 0);
-      return ok(that === al);
-    });
-    turn(al = '1', function(memo, val, key, that){
-      deepEqual([], memo);
-      ok(val === '1');
-      ok(key === 0);
-      return ok(that == al);
-    });
-    turn(function(){
-      return arguments;
-    }(1), function(it){
-      return ok(it === obj);
-    }, obj = {});
-    deepEqual([3, 2, 1], turn(function(){
-      return arguments;
-    }(1, 2, 3), function(memo, it){
-      return memo.unshift(it);
-    }));
-    deepEqual(['3', '2', '1'], turn('123', function(memo, it){
-      return memo.unshift(it);
-    }));
-  });
   test('.includes', function(){
     var includes, args, o, str;
     includes = Array.includes;
diff --git a/tests/tests/core.array.turn.ls b/tests/tests/core.array.turn.ls
deleted file mode 100644
index 69b4249ade54..000000000000
--- a/tests/tests/core.array.turn.ls
+++ /dev/null
@@ -1,14 +0,0 @@
-QUnit.module 'core-js Array#turn'
-isFunction = -> typeof! it is \Function
-test '*' !->
-  ok isFunction(Array::turn), 'Is function'
-  (arr = [1])turn (memo, val, key, that)->
-    deepEqual [] memo, 'Default memo is array'
-    ok val  is 1, 'First argumert is value'
-    ok key  is 0, 'Second argumert is index'
-    ok that is arr, 'Third argumert is array' 
-  [1]turn (memo)->
-    ok memo is obj, 'Can reduce to exist object'
-  , obj = {}
-  deepEqual [3 2 1] [1 2 3]turn((memo, it)-> memo.unshift it), 'Reduce to object and return it'
-  ok \turn of Array::[Symbol.unscopables], 'In Array#@@unscopables'
\ No newline at end of file
diff --git a/tests/tests/core.dict.ls b/tests/tests/core.dict.ls
index d53b4b76575b..64976d4b1620 100644
--- a/tests/tests/core.dict.ls
+++ b/tests/tests/core.dict.ls
@@ -144,18 +144,6 @@ test '.some' !->
   , ctx = {}
   ok not some {q:1 w:2 e:3} -> typeof! it is \String
   ok some {q:1 w:\2 e:3} -> typeof! it is \String
-test '.turn' !->
-  {turn} = Dict
-  ok isFunction(turn), 'Is function'
-  turn (obj = q: 1), (memo, val, key, that)->
-    deepEqual memo, Dict!
-    ok val  is 1
-    ok key  is \q
-    ok that is obj
-  turn {q:1} ->
-    ok it   is obj
-  , obj = {}
-  deepEqual turn({q:1 w:2 e:3} (memo, it)-> memo[it] = it), Dict {1:1 2:2 3:3}
 test '.includes' !->
   {includes} = Dict
   ok isFunction(includes), 'Is function'
diff --git a/tests/tests/js.array.statics.ls b/tests/tests/js.array.statics.ls
index 57827de708f3..29f410c42a13 100644
--- a/tests/tests/js.array.statics.ls
+++ b/tests/tests/js.array.statics.ls
@@ -2,7 +2,7 @@ QUnit.module 'Array statics'
 isFunction = -> typeof! it is \Function
 {slice} = Array::
 test 'are functions' !->
-  for <[concat join pop push reverse shift slice sort splice unshift indexOf lastIndexOf every some forEach map filter reduce reduceRight copyWithin fill find findIndex keys values entries turn includes]>
+  for <[concat join pop push reverse shift slice sort splice unshift indexOf lastIndexOf every some forEach map filter reduce reduceRight copyWithin fill find findIndex keys values entries includes]>
     ok isFunction(Array[..]), "Array.#{..} is function"
 test '.join' !->
   {join} = Array
@@ -239,23 +239,6 @@ test '.entries' !->
   deepEqual iter2.next!, {value: [1 \w], done: no}
   deepEqual iter2.next!, {value: [2 \e], done: no}
   deepEqual iter2.next!, {value: void, done: on}
-test '.turn' !->
-  {turn} = Array
-  turn (al = (->&)(1)), (memo, val, key, that)->
-    deepEqual [] memo
-    ok val  is 1
-    ok key  is 0
-    ok that is al
-  turn (al = \1), (memo, val, key, that)->
-    deepEqual [] memo
-    ok val is \1
-    ok key is 0
-    ok that ~= al
-  turn (->&)(1), ->
-    ok it is obj
-  , obj = {}
-  deepEqual [3 2 1], turn (->&)(1 2 3), ((memo, it)-> memo.unshift it)
-  deepEqual [\3 \2 \1], turn \123, ((memo, it)-> memo.unshift it)
 test '.includes' !->
   {includes} = Array
   ok isFunction(includes), 'Is function'