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ArrayPrototype.js
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347 lines (280 loc) · 10.5 KB
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/*
* Copyright (C) 2014-2017 Apple Inc. All rights reserved.
* Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
function reduce(callback /*, initialValue */)
{
"use strict";
var array = @toObject(this, "Array.prototype.reduce requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.reduce callback must be a function");
var argumentCount = @argumentCount();
if (length === 0 && argumentCount < 2)
@throwTypeError("reduce of empty array with no initial value");
var accumulator, k = 0;
if (argumentCount > 1)
accumulator = @argument(1);
else {
while (k < length && !(k in array))
k += 1;
if (k >= length)
@throwTypeError("reduce of empty array with no initial value");
accumulator = array[k++];
}
while (k < length) {
if (k in array)
accumulator = callback.@call(@undefined, accumulator, array[k], k, array);
k += 1;
}
return accumulator;
}
function reduceRight(callback /*, initialValue */)
{
"use strict";
var array = @toObject(this, "Array.prototype.reduceRight requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.reduceRight callback must be a function");
var argumentCount = @argumentCount();
if (length === 0 && argumentCount < 2)
@throwTypeError("reduceRight of empty array with no initial value");
var accumulator, k = length - 1;
if (argumentCount > 1)
accumulator = @argument(1);
else {
while (k >= 0 && !(k in array))
k -= 1;
if (k < 0)
@throwTypeError("reduceRight of empty array with no initial value");
accumulator = array[k--];
}
while (k >= 0) {
if (k in array)
accumulator = callback.@call(@undefined, accumulator, array[k], k, array);
k -= 1;
}
return accumulator;
}
function every(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.every requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.every callback must be a function");
var thisArg = @argument(1);
for (var i = 0; i < length; i++) {
if (!(i in array))
continue;
if (!callback.@call(thisArg, array[i], i, array))
return false;
}
return true;
}
function forEach(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.forEach requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.forEach callback must be a function");
var thisArg = @argument(1);
for (var i = 0; i < length; i++) {
if (i in array)
callback.@call(thisArg, array[i], i, array);
}
}
@alwaysInline
function filter(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.filter requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.filter callback must be a function");
var thisArg = @argument(1);
var result = @newArrayWithSpecies(0, array);
var nextIndex = 0;
for (var i = 0; i < length; i++) {
if (!(i in array))
continue;
var current = array[i]
if (callback.@call(thisArg, current, i, array)) {
@putByValDirect(result, nextIndex, current);
++nextIndex;
}
}
return result;
}
function map(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.map requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.map callback must be a function");
var thisArg = @argument(1);
var result = @newArrayWithSpecies(length, array);
for (var i = 0; i < length; i++) {
if (!(i in array))
continue;
var mappedValue = callback.@call(thisArg, array[i], i, array);
@putByValDirect(result, i, mappedValue);
}
return result;
}
function some(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.some requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.some callback must be a function");
var thisArg = @argument(1);
for (var i = 0; i < length; i++) {
if (!(i in array))
continue;
if (callback.@call(thisArg, array[i], i, array))
return true;
}
return false;
}
function find(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.find requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.find callback must be a function");
var thisArg = @argument(1);
for (var i = 0; i < length; i++) {
var kValue = array[i];
if (callback.@call(thisArg, kValue, i, array))
return kValue;
}
return @undefined;
}
function findLast(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.findLast requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.findLast callback must be a function");
var thisArg = @argument(1);
for (var i = length - 1; i >= 0; i--) {
var element = array[i];
if (callback.@call(thisArg, element, i, array))
return element;
}
return @undefined;
}
function findIndex(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.findIndex requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.findIndex callback must be a function");
var thisArg = @argument(1);
for (var i = 0; i < length; i++) {
if (callback.@call(thisArg, array[i], i, array))
return i;
}
return -1;
}
function findLastIndex(callback /*, thisArg */)
{
"use strict";
var array = @toObject(this, "Array.prototype.findLastIndex requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.findLastIndex callback must be a function");
var thisArg = @argument(1);
for (var i = length - 1; i >= 0; i--) {
if (callback.@call(thisArg, array[i], i, array))
return i;
}
return -1;
}
@linkTimeConstant
function flatIntoArray(target, source, sourceLength, targetIndex, depth)
{
"use strict";
for (var sourceIndex = 0; sourceIndex < sourceLength; ++sourceIndex) {
if (sourceIndex in source) {
var element = source[sourceIndex];
if (depth > 0 && @isArray(element))
targetIndex = @flatIntoArray(target, element, @toLength(element.length), targetIndex, depth - 1);
else {
if (targetIndex >= @MAX_SAFE_INTEGER)
@throwTypeError("flatten array exceeds 2**53 - 1");
@putByValDirect(target, targetIndex, element);
++targetIndex;
}
}
}
return targetIndex;
}
@linkTimeConstant
function flatIntoArrayWithCallback(target, source, sourceLength, targetIndex, callback, thisArg)
{
"use strict";
for (var sourceIndex = 0; sourceIndex < sourceLength; ++sourceIndex) {
if (sourceIndex in source) {
var element = callback.@call(thisArg, source[sourceIndex], sourceIndex, source);
if (@isArray(element))
targetIndex = @flatIntoArray(target, element, @toLength(element.length), targetIndex, 0);
else {
if (targetIndex >= @MAX_SAFE_INTEGER)
@throwTypeError("flatten array exceeds 2**53 - 1");
@putByValDirect(target, targetIndex, element);
++targetIndex;
}
}
}
return target;
}
function flatMap(callback)
{
"use strict";
var array = @toObject(this, "Array.prototype.flatMap requires that |this| not be null or undefined");
var length = @toLength(array.length);
if (!@isCallable(callback))
@throwTypeError("Array.prototype.flatMap callback must be a function");
var thisArg = @argument(1);
var result = @newArrayWithSpecies(0, array);
return @flatIntoArrayWithCallback(result, array, length, 0, callback, thisArg);
}
function at(index)
{
"use strict";
var array = @toObject(this, "Array.prototype.at requires that |this| not be null or undefined");
var length = @toLength(array.length);
var k = @toIntegerOrInfinity(index);
if (k < 0)
k += length;
return (k >= 0 && k < length) ? array[k] : @undefined;
}
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