Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-02-07 18:07:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update reduce repeated code.

Browse Source 
Former-commit-id: 3412cde47a136dab5c241c67d1c29f2e676c38d1
This commit is contained in:
John-David Dalton
2012-09-29 03:13:45 -07:00
parent 42f58cbbb3
commit 40cf5c99ef
5 changed files with 254 additions and 272 deletions
Download Patch File Download Diff File Expand all files Collapse all files

187
lodash.js
View File

@@ -81,6 +81,7 @@
/* Native method shortcuts for methods with the same name as other `lodash` methods */
var nativeBind = reNative.test(nativeBind = slice.bind) && nativeBind,
nativeFloor = Math.floor,
nativeGetPrototypeOf = reNative.test(nativeGetPrototypeOf = Object.getPrototypeOf) && nativeGetPrototypeOf,
nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray,
nativeIsFinite = window.isFinite,
nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys,
@@ -452,24 +453,14 @@
var baseIteratorOptions = {
'args': 'collection, callback, thisArg',
'init': 'collection',
'top':
'if (!callback) {\n' +
' callback = identity\n' +
'} else if (thisArg !== undefined) {\n' +
' callback = bindCallback(callback, thisArg)\n' +
'}',
'top': 'callback = createCallback(callback, thisArg)',
'inLoop': 'if (callback(value, index, collection) === false) return result'
};
/** Reusable iterator options for `countBy`, `groupBy`, and `sortBy` */
var countByIteratorOptions = {
'init': '{}',
'top':
'if (typeof callback != \'function\') {\n' +
' callback = propertyCallback(callback)\n' +
'} else if (thisArg !== undefined) {\n' +
' callback = bindCallback(callback, thisArg)\n' +
'}',
'top': 'callback = createCallback(callback, thisArg)',
'inLoop':
'var prop = callback(value, index, collection);\n' +
'(hasOwnProperty.call(result, prop) ? result[prop]++ : result[prop] = 1)'
@@ -502,7 +493,7 @@
/** Reusable iterator options for `find`, `forEach`, `forIn`, and `forOwn` */
var forEachIteratorOptions = {
'top': 'if (thisArg !== undefined) callback = bindCallback(callback, thisArg)'
'top': 'callback = createCallback(callback, thisArg)'
};
/** Reusable iterator options for `forIn` and `forOwn` */
@@ -532,11 +523,8 @@
'init': '{}',
'top':
'var isFunc = typeof callback == \'function\';\n' +
'if (!isFunc) {\n' +
' var props = concat.apply(ArrayProto, arguments)\n' +
'} else if (thisArg !== undefined) {\n' +
' callback = bindCallback(callback, thisArg)\n' +
'}',
'callback = createCallback(callback, thisArg);\n' +
'if (!isFunc) var props = concat.apply(ArrayProto, arguments)',
'inLoop':
'if (isFunc\n' +
' ? !callback(value, index, object)\n' +
@@ -546,21 +534,6 @@
/*--------------------------------------------------------------------------*/
/**
* Creates a bound iterator function that, when called, invokes `func` with
* the `this` binding of `thisArg` and the arguments (value, index, object).
*
* @private
* @param {Function} func The function to bind.
* @param {Mixed} [thisArg] The `this` binding of `func`.
* @returns {Function} Returns the new bound function.
*/
function bindCallback(func, thisArg) {
return function(value, index, object) {
return func.call(thisArg, value, index, object);
};
}
/**
* Creates a function optimized for searching large arrays for a given `value`,
* starting at `fromIndex`, using strict equality for comparisons, i.e. `===`.
@@ -681,6 +654,31 @@
return bound;
}
/**
* Produces an iteration callback bound to an optional `thisArg`. If `func` is
* a property name, the callback will return the property value for a given element.
*
* @private
* @param {Function|String} [func=identity|property] The function called per
* iteration or property name to query.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Function} Returns a callback function.
*/
function createCallback(func, thisArg) {
if (!func) {
return identity;
} else if (typeof func != 'function') {
return function(object) {
return object[func];
}
} else if (thisArg !== undefined) {
return function(value, index, object) {
return func.call(thisArg, value, index, object);
};
}
return func;
}
/**
* Creates compiled iteration functions. The iteration function will be created
* to iterate over only objects if the first argument of `options.args` is
@@ -767,19 +765,19 @@
}
// create the function factory
var factory = Function(
'arrayLikeClasses, ArrayProto, bind, bindCallback, compareAscending, concat, ' +
'arrayLikeClasses, ArrayProto, bind, compareAscending, concat, createCallback, ' +
'forIn, hasOwnProperty, identity, indexOf, isArguments, isArray, isFunction, ' +
'isPlainObject, objectClass, objectTypes, nativeKeys, propertyIsEnumerable, ' +
'propertyCallback, slice, stringClass, toString, undefined',
'slice, stringClass, toString, undefined',
'var callee = function(' + args + ') {\n' + iteratorTemplate(data) + '\n};\n' +
'return callee'
);
// return the compiled function
return factory(
arrayLikeClasses, ArrayProto, bind, bindCallback, compareAscending, concat,
arrayLikeClasses, ArrayProto, bind, compareAscending, concat, createCallback,
forIn, hasOwnProperty, identity, indexOf, isArguments, isArray, isFunction,
isPlainObject, objectClass, objectTypes, nativeKeys, propertyIsEnumerable,
propertyCallback, slice, stringClass, toString
slice, stringClass, toString
);
}
@@ -807,16 +805,12 @@
}
/**
* Creates a function that returns the `property` value of the given `object`.
* A no-operation function.
*
* @private
* @param {String} property The property to get the value of.
* @returns {Function} Returns the new function.
*/
function propertyCallback(property) {
return function(object) {
return object[property];
};
function noop() {
// no operation performed
}
/**
@@ -925,15 +919,15 @@
* _.isPlainObject({ 'name': 'moe', 'age': 40 });
* // => true
*/
var isPlainObject = objectTypes.__proto__ != ObjectProto ? isPlainFallback : function(value) {
if (!value) {
var isPlainObject = !nativeGetPrototypeOf ? isPlainFallback : function(value) {
if (!(value && typeof value == 'object')) {
return false;
}
var valueOf = value.valueOf,
objProto = typeof valueOf == 'function' && (objProto = valueOf.__proto__) && objProto.__proto__;
objProto = typeof valueOf == 'function' && (objProto = nativeGetPrototypeOf(valueOf)) && nativeGetPrototypeOf(objProto);
return objProto
? value == objProto || (value.__proto__ == objProto && !isArguments(value))
? value == objProto || (nativeGetPrototypeOf(value) == objProto && !isArguments(value))
: isPlainFallback(value);
};
@@ -1158,7 +1152,7 @@
* @category Objects
* @param {Object} object The object to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns `object`.
* @example
*
@@ -1190,7 +1184,7 @@
* @category Objects
* @param {Object} object The object to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns `object`.
* @example
*
@@ -1784,7 +1778,7 @@
* @param {Object} object The source object.
* @param {Function|String} callback|[prop1, prop2, ...] The properties to omit
* or the function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns an object without the omitted properties.
* @example
*
@@ -1831,7 +1825,7 @@
* @param {Object} object The source object.
* @param {Function|String} callback|[prop1, prop2, ...] The properties to pick
* or the function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns an object composed of the picked properties.
* @example
*
@@ -1854,7 +1848,7 @@
' if (prop in object) result[prop] = object[prop]\n' +
' }\n' +
'} else {\n' +
' if (thisArg !== undefined) callback = bindCallback(callback, thisArg)',
' callback = createCallback(callback, thisArg)',
'inLoop':
'if (callback(value, index, object)) result[index] = value',
'bottom': '}'
@@ -1926,7 +1920,7 @@
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function|String} callback|property The function called per iteration
* or property name to count by.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns the composed aggregate object.
* @example
*
@@ -1952,7 +1946,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Boolean} Returns `true` if all elements pass the callback check,
* else `false`.
* @example
@@ -1973,7 +1967,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a new array of elements that passed the callback check.
* @example
*
@@ -1994,7 +1988,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Mixed} Returns the element that passed the callback check,
* else `undefined`.
* @example
@@ -2019,7 +2013,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array|Object|String} Returns `collection`.
* @example
*
@@ -2044,7 +2038,7 @@
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function|String} callback|property The function called per iteration
* or property name to group by.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns the composed aggregate object.
* @example
*
@@ -2110,7 +2104,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a new array of the results of each `callback` execution.
* @example
*
@@ -2164,7 +2158,7 @@
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [accumulator] Initial value of the accumulator.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Mixed} Returns the accumulated value.
* @example
*
@@ -2176,7 +2170,7 @@
'init': 'accumulator',
'top':
'var noaccum = arguments.length < 3;\n' +
'if (thisArg !== undefined) callback = bindCallback(callback, thisArg)',
'callback = createCallback(callback, thisArg)',
'beforeLoop': {
'array': 'if (noaccum) result = iteratee[++index]'
},
@@ -2200,7 +2194,7 @@
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [accumulator] Initial value of the accumulator.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Mixed} Returns the accumulated value.
* @example
*
@@ -2237,7 +2231,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a new array of elements that did **not** pass the
* callback check.
* @example
@@ -2286,7 +2280,7 @@
* @category Collections
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Boolean} Returns `true` if any element passes the callback check,
* else `false`.
* @example
@@ -2311,7 +2305,7 @@
* @param {Array|Object|String} collection The collection to iterate over.
* @param {Function|String} callback|property The function called per iteration
* or property name to sort by.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a new array of sorted elements.
* @example
*
@@ -2693,7 +2687,7 @@
* @category Arrays
* @param {Array} array The array to iterate over.
* @param {Function} [callback] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Mixed} Returns the maximum value.
* @example
*
@@ -2708,16 +2702,12 @@
*/
function max(array, callback, thisArg) {
var current,
result,
computed = -Infinity,
index = -1,
length = array ? array.length : 0;
length = array ? array.length : 0,
result = computed;
if (!callback) {
callback = identity;
} else if (thisArg !== undefined) {
callback = bindCallback(callback, thisArg);
}
callback = createCallback(callback, thisArg);
while (++index < length) {
current = callback(array[index], index, array);
if (current > computed) {
@@ -2739,7 +2729,7 @@
* @category Arrays
* @param {Array} array The array to iterate over.
* @param {Function} [callback] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Mixed} Returns the minimum value.
* @example
*
@@ -2748,16 +2738,12 @@
*/
function min(array, callback, thisArg) {
var current,
result,
computed = Infinity,
index = -1,
length = array ? array.length : 0;
length = array ? array.length : 0,
result = computed;
if (!callback) {
callback = identity;
} else if (thisArg !== undefined) {
callback = bindCallback(callback, thisArg);
}
callback = createCallback(callback, thisArg);
while (++index < length) {
current = callback(array[index], index, array);
if (current < computed) {
@@ -2905,32 +2891,37 @@
* should be inserted into `array` in order to maintain the sort order of the
* sorted `array`. If `callback` is passed, it will be executed for `value` and
* each element in `array` to compute their sort ranking. The `callback` is
* bound to `thisArg` and invoked with one argument; (value).
* bound to `thisArg` and invoked with one argument; (value). The `callback`
* argument may also be the name of a property to order by.
*
* @static
* @memberOf _
* @category Arrays
* @param {Array} array The array to iterate over.
* @param {Mixed} value The value to evaluate.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Function|String} [callback=identity|property] The function called
* per iteration or property name to order by.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Number} Returns the index at which the value should be inserted
* into `array`.
* @example
*
* _.sortedIndex([20, 30, 40], 35);
* _.sortedIndex([20, 30, 50], 40);
* // => 2
*
* _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
* // => 2
*
* var dict = {
* 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'thirty-five': 35, 'fourty': 40 }
* 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
* };
*
* _.sortedIndex(['twenty', 'thirty', 'fourty'], 'thirty-five', function(word) {
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
* return dict.wordToNumber[word];
* });
* // => 2
*
* _.sortedIndex(['twenty', 'thirty', 'fourty'], 'thirty-five', function(word) {
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
* return this.wordToNumber[word];
* }, dict);
* // => 2
@@ -2940,13 +2931,7 @@
low = 0,
high = array.length;
if (!callback) {
callback = identity;
} else if (typeof callback != 'function') {
callback = propertyCallback(callback);
} else if (thisArg !== undefined) {
callback = bind(callback, thisArg);
}
callback = createCallback(callback, thisArg);
value = callback(value);
while (low < high) {
mid = (low + high) >>> 1;
@@ -2998,7 +2983,7 @@
* @param {Array} array The array to process.
* @param {Boolean} [isSorted=false] A flag to indicate that the `array` is already sorted.
* @param {Function} [callback=identity] The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a duplicate-value-free array.
* @example
*
@@ -3027,11 +3012,7 @@
callback = isSorted;
isSorted = false;
}
if (!callback) {
callback = identity;
} else if (thisArg !== undefined) {
callback = bindCallback(callback, thisArg);
}
callback = createCallback(callback, thisArg);
while (++index < length) {
computed = callback(array[index], index, array);
if (isSorted
@@ -3853,7 +3834,7 @@
* @category Utilities
* @param {Number} n The number of times to execute the callback.
* @param {Function} callback The function called per iteration.
* @param {Mixed} [thisArg] The `this` binding for the callback.
* @param {Mixed} [thisArg] The `this` binding of `callback`.
* @returns {Array} Returns a new array of the results of each `callback` execution.
* @example
*