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Use getLength to avoid an iOS JIT bug.

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jdalton
2015-04-01 21:26:05 -07:00
parent b28016bfeb
commit 4a8695caff
1 changed files with 16 additions and 13 deletions
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29
lodash.src.js
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@@ -742,7 +742,10 @@
/** Used to resolve the decompiled source of functions. */ /** Used to resolve the decompiled source of functions. */
var fnToString = Function.prototype.toString; var fnToString = Function.prototype.toString;
/** Used to the length of n-tuples for `_.unzip`. */ /**
* Used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
* in Safari on iOS 8.1 ARM64.
*/
var getLength = baseProperty('length'); var getLength = baseProperty('length');
/** Used to check objects for own properties. */ /** Used to check objects for own properties. */
@@ -2594,7 +2597,7 @@
if (isLength(srcValue.length) && (isArray(srcValue) || isTypedArray(srcValue))) { if (isLength(srcValue.length) && (isArray(srcValue) || isTypedArray(srcValue))) {
result = isArray(value) result = isArray(value)
? value ? value
: ((value && value.length) ? arrayCopy(value) : []); : (getLength(value) ? arrayCopy(value) : []);
} }
else if (isPlainObject(srcValue) || isArguments(srcValue)) { else if (isPlainObject(srcValue) || isArguments(srcValue)) {
result = isArguments(value) result = isArguments(value)
@@ -2803,7 +2806,7 @@
*/ */
function baseSortByOrder(collection, props, orders) { function baseSortByOrder(collection, props, orders) {
var index = -1, var index = -1,
length = collection.length, length = getLength(collection),
result = isLength(length) ? Array(length) : []; result = isLength(length) ? Array(length) : [];
baseEach(collection, function(value) { baseEach(collection, function(value) {
@@ -3245,7 +3248,7 @@
*/ */
function createBaseEach(eachFunc, fromRight) { function createBaseEach(eachFunc, fromRight) {
return function(collection, iteratee) { return function(collection, iteratee) {
var length = collection ? collection.length : 0; var length = collection ? getLength(collection) : 0;
if (!isLength(length)) { if (!isLength(length)) {
return eachFunc(collection, iteratee); return eachFunc(collection, iteratee);
} }
@@ -4228,7 +4231,7 @@
} }
var type = typeof index; var type = typeof index;
if (type == 'number') { if (type == 'number') {
var length = object.length, var length = getLength(object),
prereq = isLength(length) && isIndex(index, length); prereq = isLength(length) && isIndex(index, length);
} else { } else {
prereq = type == 'string' && index in object; prereq = type == 'string' && index in object;
@@ -4539,7 +4542,7 @@
if (value == null) { if (value == null) {
return []; return [];
} }
if (!isLength(value.length)) { if (!isLength(getLength(value))) {
return values(value); return values(value);
} }
if (lodash.support.unindexedChars && isString(value)) { if (lodash.support.unindexedChars && isString(value)) {
@@ -6225,7 +6228,7 @@
* // => ['barney', 'pebbles'] * // => ['barney', 'pebbles']
*/ */
var at = restParam(function(collection, props) { var at = restParam(function(collection, props) {
var length = collection ? collection.length : 0; var length = collection ? getLength(collection) : 0;
if (isLength(length)) { if (isLength(length)) {
collection = toIterable(collection); collection = toIterable(collection);
} }
@@ -6633,7 +6636,7 @@
* // => true * // => true
*/ */
function includes(collection, target, fromIndex, guard) { function includes(collection, target, fromIndex, guard) {
var length = collection ? collection.length : 0; var length = collection ? getLength(collection) : 0;
if (!isLength(length)) { if (!isLength(length)) {
collection = values(collection); collection = values(collection);
length = collection.length; length = collection.length;
@@ -6726,7 +6729,7 @@
var invoke = restParam(function(collection, methodName, args) { var invoke = restParam(function(collection, methodName, args) {
var index = -1, var index = -1,
isFunc = typeof methodName == 'function', isFunc = typeof methodName == 'function',
length = collection ? collection.length : 0, length = getLength(collection),
result = isLength(length) ? Array(length) : []; result = isLength(length) ? Array(length) : [];
baseEach(collection, function(value) { baseEach(collection, function(value) {
@@ -7086,7 +7089,7 @@
* // => 7 * // => 7
*/ */
function size(collection) { function size(collection) {
var length = collection ? collection.length : 0; var length = collection ? getLength(collection) : 0;
return isLength(length) ? length : keys(collection).length; return isLength(length) ? length : keys(collection).length;
} }
@@ -7204,7 +7207,7 @@
return []; return [];
} }
var index = -1, var index = -1,
length = collection.length, length = getLength(collection),
result = isLength(length) ? Array(length) : []; result = isLength(length) ? Array(length) : [];
if (thisArg && isIterateeCall(collection, iteratee, thisArg)) { if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
@@ -8600,7 +8603,7 @@
if (value == null) { if (value == null) {
return true; return true;
} }
var length = value.length; var length = getLength(value);
if (isLength(length) && (isArray(value) || isString(value) || isArguments(value) || if (isLength(length) && (isArray(value) || isString(value) || isArguments(value) ||
(isObjectLike(value) && isFunction(value.splice)))) { (isObjectLike(value) && isFunction(value.splice)))) {
return !length; return !length;
@@ -9071,7 +9074,7 @@
* // => [2, 3] * // => [2, 3]
*/ */
function toArray(value) { function toArray(value) {
var length = value ? value.length : 0; var length = value ? getLength(value) : 0;
if (!isLength(length)) { if (!isLength(length)) {
return values(value); return values(value);
} }