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Remove toLength.

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John-David Dalton
2014-03-14 09:43:22 -07:00
parent 5d89fa3f07
commit 7a2f6ebfd5
1 changed files with 14 additions and 24 deletions
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38
lodash.js
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@@ -616,7 +616,11 @@
/** Used to restore the original `_` reference in `noConflict` */ /** Used to restore the original `_` reference in `noConflict` */
var oldDash = context._; var oldDash = context._;
/** Used as the maximum value returned by `toLength` */ /**
* Used as the maximum length an array-like object.
* See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
* for more details.
*/
var maxSafeInteger = Math.pow(2, 53) - 1; var maxSafeInteger = Math.pow(2, 53) - 1;
/** Used to resolve the internal [[Class]] of values */ /** Used to resolve the internal [[Class]] of values */
@@ -1343,8 +1347,7 @@
iterable = collection, iterable = collection,
length = collection ? collection.length : 0; length = collection ? collection.length : 0;
if (typeof length == 'number') { if (typeof length == 'number' && length > -1 && length <= maxSafeInteger) {
length = toLength(length);
if (support.unindexedChars && isString(iterable)) { if (support.unindexedChars && isString(iterable)) {
iterable = iterable.split(''); iterable = iterable.split('');
} }
@@ -1372,8 +1375,7 @@
var iterable = collection, var iterable = collection,
length = collection ? collection.length : 0; length = collection ? collection.length : 0;
if (typeof length == 'number') { if (typeof length == 'number' && length > -1 && length <= maxSafeInteger) {
length = toLength(length);
if (support.unindexedChars && isString(iterable)) { if (support.unindexedChars && isString(iterable)) {
iterable = iterable.split(''); iterable = iterable.split('');
} }
@@ -2205,20 +2207,6 @@
return result; return result;
} }
/**
* Converts `value` to an integer suitable for use as the length of an array-like
* object. See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
* for more details.
*
* @private
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
*/
function toLength(value) {
var result = +value || 0;
return result < 0 ? 0 : (result < maxSafeInteger ? result : maxSafeInteger);
}
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
/** /**
@@ -3573,10 +3561,10 @@
* // => true * // => true
*/ */
function contains(collection, target, fromIndex) { function contains(collection, target, fromIndex) {
var length = toLength(collection && collection.length); var length = collection ? collection.length : 0;
fromIndex = (typeof fromIndex == 'number' && +fromIndex) || 0; fromIndex = (typeof fromIndex == 'number' && +fromIndex) || 0;
if (length) { if (typeof length == 'number' && length > -1 && length <= maxSafeInteger) {
if (typeof collection == 'string' || !isArray(collection) && isString(collection)) { if (typeof collection == 'string' || !isArray(collection) && isString(collection)) {
if (fromIndex >= length) { if (fromIndex >= length) {
return false; return false;
@@ -4470,7 +4458,7 @@
collection = collection.split(''); collection = collection.split('');
} }
if (n == null || guard) { if (n == null || guard) {
var length = toLength(collection && collection.length); var length = collection ? collection.length : 0;
return length > 0 ? collection[baseRandom(0, length - 1)] : undefined; return length > 0 ? collection[baseRandom(0, length - 1)] : undefined;
} }
var result = shuffle(collection); var result = shuffle(collection);
@@ -4529,7 +4517,9 @@
*/ */
function size(collection) { function size(collection) {
var length = collection ? collection.length : 0; var length = collection ? collection.length : 0;
return typeof length == 'number' && length > -1 ? length : keys(collection).length; return (typeof length == 'number' && length > -1 && length <= maxSafeInteger)
? length
: keys(collection).length;
} }
/** /**
@@ -4690,7 +4680,7 @@
*/ */
function toArray(collection) { function toArray(collection) {
var length = collection && collection.length; var length = collection && collection.length;
if (typeof length == 'number' && length > -1) { if (typeof length == 'number' && length > -1 && length <= maxSafeInteger) {
return (support.unindexedChars && isString(collection)) return (support.unindexedChars && isString(collection))
? collection.split('') ? collection.split('')
: slice(collection); : slice(collection);