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Revert rename of baseSlice and add initArrayClone and initObjectClone.

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John-David Dalton
2014-08-08 09:28:16 -07:00
parent e54b8ead72
commit 476d85915b
1 changed files with 116 additions and 97 deletions
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213
lodash.js
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@@ -298,24 +298,6 @@
/*--------------------------------------------------------------------------*/
/**
* Creates a shallow clone of `array`.
*
* @private
* @param {Array} array The array to slice.
* @returns {Array} Returns the cloned array.
*/
function arrayClone(array) {
var index = -1,
length = array ? array.length : 0,
result = Array(length);
while (++index < length) {
result[index] = array[index];
}
return result;
}
/**
* The base implementation of `_.at` without support for strings and individual
* key arguments.
@@ -380,6 +362,25 @@
return -1;
}
/**
* The base implementation of `_.slice` without support for `start` and `end`
* arguments.
*
* @private
* @param {Array} array The array to slice.
* @returns {Array} Returns the slice of `array`.
*/
function baseSlice(array) {
var index = -1,
length = array ? array.length : 0,
result = Array(length);
while (++index < length) {
result[index] = array[index];
}
return result;
}
/**
* An implementation of `_.contains` for cache objects that mimics the return
* signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
@@ -1424,79 +1425,15 @@
if (typeof result != 'undefined') {
return result;
}
var isArr = isArray(value),
isShallow = !isDeep;
var isArr = isArray(value);
result = value;
if (isArr) {
result = isShallow ? arrayClone(value) : value.constructor(value.length);
// add array properties assigned by `RegExp#exec`
if (typeof value[0] == 'string' && hasOwnProperty.call(value, 'index')) {
result.index = value.index;
result.input = value.input;
}
if (isShallow) {
return result;
}
result = initArrayClone(value, isDeep);
} else if (isObject(value)) {
result = initObjectClone(value, isDeep);
value = (isDeep && toString.call(result) == objectClass) ? value : result;
}
else {
if (!isObject(value)) {
return value;
}
var className = toString.call(value);
if (!cloneableClasses[className] || (!support.nodeClass && isNode(value))) {
return value;
}
var isArgs = className == argsClass || (!support.argsClass && isArguments(value)),
isObj = !isArgs && className == objectClass;
if (isShallow && (isArgs || isObj)) {
result = baseAssign({}, value);
if (isObj) {
return result;
}
}
var Ctor = value.constructor;
if (className == objectClass && !(isFunction(Ctor) && (Ctor instanceof Ctor))) {
Ctor = Object;
}
if (isDeep && (isArgs || isObj)) {
result = new Ctor;
}
else {
switch (className) {
case arrayBufferClass:
return bufferClone(value);
case boolClass:
case dateClass:
return new Ctor(+value);
case float32Class: case float64Class:
case int8Class: case int16Class: case int32Class:
case uint8Class: case uint8ClampedClass: case uint16Class: case uint32Class:
// Safari 5 mobile incorrectly has `Object` as the constructor
if (Ctor instanceof Ctor) {
Ctor = ctorByClass[className];
}
var buffer = value.buffer;
return new Ctor(isDeep ? bufferClone(buffer) : buffer, value.byteOffset, value.length);
case numberClass:
case stringClass:
return new Ctor(value);
case regexpClass:
result = Ctor(value.source, reFlags.exec(value));
result.lastIndex = value.lastIndex;
return result;
}
}
}
if (isArgs) {
result.length = value.length;
}
if (isShallow) {
if (!isDeep || result === value) {
return result;
}
// check for circular references and return corresponding clone
@@ -2809,17 +2746,17 @@
var funcData = !isBindKey && func[EXPANDO];
if (funcData && funcData !== true) {
// shallow clone `funcData`
funcData = arrayClone(funcData);
funcData = baseSlice(funcData);
// clone partial left arguments
if (funcData[4]) {
funcData[4] = arrayClone(funcData[4]);
funcData[5] = arrayClone(funcData[5]);
funcData[4] = baseSlice(funcData[4]);
funcData[5] = baseSlice(funcData[5]);
}
// clone partial right arguments
if (funcData[6]) {
funcData[6] = arrayClone(funcData[6]);
funcData[7] = arrayClone(funcData[7]);
funcData[6] = baseSlice(funcData[6]);
funcData[7] = baseSlice(funcData[7]);
}
// set arity if provided
if (typeof arity == 'number') {
@@ -2893,6 +2830,88 @@
return collection ? result(collection, target, fromIndex) : result;
}
/**
* Initializes an array clone.
*
* @private
* @param {*} value The value to clone.
* @param {boolean} [isDeep=false] Specify a deep clone.
* @returns {*} Returns the initialized clone value.
*/
function initArrayClone(array, isDeep) {
var index = -1,
length = array.length,
result = array.constructor(length);
if (!isDeep) {
while (++index < length) {
result[index] = array[index];
}
}
// add array properties assigned by `RegExp#exec`
if (typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
result.index = array.index;
result.input = array.input;
}
return result;
}
/**
* Initializes an object clone.
*
* @private
* @param {*} value The value to clone.
* @param {boolean} [isDeep=false] Specify a deep clone.
* @returns {*} Returns the initialized clone value.
*/
function initObjectClone(object, isDeep) {
var className = toString.call(object);
if (!cloneableClasses[className] || (!support.nodeClass && isNode(object))) {
return object;
}
var Ctor = object.constructor,
isArgs = className == argsClass || (!support.argsClass && isArguments(object)),
isObj = className == objectClass;
if (isObj && !(isFunction(Ctor) && (Ctor instanceof Ctor))) {
Ctor = Object;
}
if (isArgs || isObj) {
var result = isDeep ? new Ctor : baseAssign(new Ctor, object);
if (isArgs) {
result.length = object.length;
}
return result;
}
switch (className) {
case arrayBufferClass:
return bufferClone(object);
case boolClass:
case dateClass:
return new Ctor(+object);
case float32Class: case float64Class:
case int8Class: case int16Class: case int32Class:
case uint8Class: case uint8ClampedClass: case uint16Class: case uint32Class:
// Safari 5 mobile incorrectly has `Object` as the constructor
if (Ctor instanceof Ctor) {
Ctor = ctorByClass[className];
}
var buffer = object.buffer;
return new Ctor(isDeep ? bufferClone(buffer) : buffer, object.byteOffset, object.length);
case numberClass:
case stringClass:
return new Ctor(object);
case regexpClass:
result = Ctor(object.source, reFlags.exec(object));
result.lastIndex = object.lastIndex;
}
return result;
}
/**
* Checks if `value` is an array-like object.
*
@@ -3932,7 +3951,7 @@
end += length;
}
if (end && end == length && !start) {
return arrayClone(array);
return baseSlice(array);
}
length = start > end ? 0 : (end - start);
@@ -5645,7 +5664,7 @@
if (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) {
return (support.unindexedChars && isString(collection))
? collection.split('')
: arrayClone(collection);
: baseSlice(collection);
}
return values(collection);
}
@@ -6658,7 +6677,7 @@
if (object == null) {
return object;
}
var args = arrayClone(arguments);
var args = baseSlice(arguments);
args.push(assignDefaults);
return assign.apply(undefined, args);
}