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Ensure _.min and _.max can be used as the callback of _.map. [closes #379]

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This commit is contained in:
John-David Dalton
2013-10-29 09:32:40 -07:00
parent 3fa2e7e12e
commit ac8f8d0dd6
8 changed files with 156 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
dist/lodash.compat.js vendored
View File

@@ -2900,6 +2900,7 @@
if (!isObject(object)) {
return object;
}
// allows working with `_.reduce` and `_.reduceRight` without using
// their `index` and `collection` arguments
if (typeof args[2] != 'number') {
@@ -3779,7 +3780,12 @@
var computed = -Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3790,7 +3796,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -3849,7 +3855,12 @@
var computed = Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3860,7 +3871,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -4034,8 +4045,8 @@
* @category Collections
* @param {Array|Object|string} collection The collection to sample.
* @param {number} [n] The number of elements to sample.
* @param- {Object} [guard] Allows working with functions, like `_.map`,
* without using their `key` and `object` arguments as sources.
* @param- {Object} [guard] Allows working with functions like `_.map`
* without using their `index` arguments as `n`.
* @returns {Array} Returns the random sample(s) of `collection`.
* @example
*
@@ -4577,7 +4588,7 @@
// juggle arguments
if (typeof isShallow != 'boolean' && isShallow != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isShallow] === array) ? isShallow : null;
callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
isShallow = false;
}
if (callback != null) {
@@ -4931,7 +4942,7 @@
end = start;
start = 0;
}
// use `Array(length)` so engines, like Chakra and V8, avoid slower modes
// use `Array(length)` so engines like Chakra and V8 avoid slower modes
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
var index = -1,
length = nativeMax(0, ceil((end - start) / (step || 1))),
@@ -5192,7 +5203,7 @@
// juggle arguments
if (typeof isSorted != 'boolean' && isSorted != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isSorted] === array) ? isSorted : null;
callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
isSorted = false;
}
if (callback != null) {
@@ -6842,7 +6853,7 @@
// expose Lo-Dash
var _ = runInContext();
// some AMD build optimizers, like r.js, check for condition patterns like the following:
// some AMD build optimizers like r.js check for condition patterns like the following:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lo-Dash to the global object even when an AMD loader is present in
// case Lo-Dash was injected by a third-party script and not intended to be

31
dist/lodash.compat.min.js vendored
View File

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31
dist/lodash.js vendored
View File

@@ -2560,6 +2560,7 @@
if (!isObject(object)) {
return object;
}
// allows working with `_.reduce` and `_.reduceRight` without using
// their `index` and `collection` arguments
if (typeof args[2] != 'number') {
@@ -3432,7 +3433,12 @@
var computed = -Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3443,7 +3449,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -3502,7 +3508,12 @@
var computed = Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3513,7 +3524,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -3699,8 +3710,8 @@
* @category Collections
* @param {Array|Object|string} collection The collection to sample.
* @param {number} [n] The number of elements to sample.
* @param- {Object} [guard] Allows working with functions, like `_.map`,
* without using their `key` and `object` arguments as sources.
* @param- {Object} [guard] Allows working with functions like `_.map`
* without using their `index` arguments as `n`.
* @returns {Array} Returns the random sample(s) of `collection`.
* @example
*
@@ -4238,7 +4249,7 @@
// juggle arguments
if (typeof isShallow != 'boolean' && isShallow != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isShallow] === array) ? isShallow : null;
callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
isShallow = false;
}
if (callback != null) {
@@ -4592,7 +4603,7 @@
end = start;
start = 0;
}
// use `Array(length)` so engines, like Chakra and V8, avoid slower modes
// use `Array(length)` so engines like Chakra and V8 avoid slower modes
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
var index = -1,
length = nativeMax(0, ceil((end - start) / (step || 1))),
@@ -4853,7 +4864,7 @@
// juggle arguments
if (typeof isSorted != 'boolean' && isSorted != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isSorted] === array) ? isSorted : null;
callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
isSorted = false;
}
if (callback != null) {
@@ -6481,7 +6492,7 @@
// expose Lo-Dash
var _ = runInContext();
// some AMD build optimizers, like r.js, check for condition patterns like the following:
// some AMD build optimizers like r.js check for condition patterns like the following:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lo-Dash to the global object even when an AMD loader is present in
// case Lo-Dash was injected by a third-party script and not intended to be

37
dist/lodash.min.js vendored
View File

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32
dist/lodash.underscore.js vendored
View File

@@ -2278,10 +2278,15 @@
var computed = -Infinity,
result = computed;
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
var index = -1,
length = collection ? collection.length : 0;
if (!callback && typeof length == 'number') {
if (callback == null && typeof length == 'number') {
while (++index < length) {
var value = collection[index];
if (value > result) {
@@ -2289,7 +2294,9 @@
}
}
} else {
callback = createCallback(callback, thisArg, 3);
callback = (callback == null && isString(collection))
? charAtCallback
: createCallback(callback, thisArg, 3);
forEach(collection, function(value, index, collection) {
var current = callback(value, index, collection);
@@ -2346,10 +2353,15 @@
var computed = Infinity,
result = computed;
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
var index = -1,
length = collection ? collection.length : 0;
if (!callback && typeof length == 'number') {
if (callback == null && typeof length == 'number') {
while (++index < length) {
var value = collection[index];
if (value < result) {
@@ -2357,7 +2369,9 @@
}
}
} else {
callback = createCallback(callback, thisArg, 3);
callback = (callback == null && isString(collection))
? charAtCallback
: createCallback(callback, thisArg, 3);
forEach(collection, function(value, index, collection) {
var current = callback(value, index, collection);
@@ -2541,8 +2555,8 @@
* @category Collections
* @param {Array|Object|string} collection The collection to sample.
* @param {number} [n] The number of elements to sample.
* @param- {Object} [guard] Allows working with functions, like `_.map`,
* without using their `key` and `object` arguments as sources.
* @param- {Object} [guard] Allows working with functions like `_.map`
* without using their `index` arguments as `n`.
* @returns {Array} Returns the random sample(s) of `collection`.
* @example
*
@@ -3254,7 +3268,7 @@
end = start;
start = 0;
}
// use `Array(length)` so engines, like Chakra and V8, avoid slower modes
// use `Array(length)` so engines like Chakra and V8 avoid slower modes
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
var index = -1,
length = nativeMax(0, ceil((end - start) / step)),
@@ -3466,7 +3480,7 @@
// juggle arguments
if (typeof isSorted != 'boolean' && isSorted != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isSorted] === array) ? isSorted : null;
callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
isSorted = false;
}
if (callback != null) {
@@ -4785,7 +4799,7 @@
/*--------------------------------------------------------------------------*/
// some AMD build optimizers, like r.js, check for condition patterns like the following:
// some AMD build optimizers like r.js check for condition patterns like the following:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lo-Dash to the global object even when an AMD loader is present in
// case Lo-Dash was injected by a third-party script and not intended to be

52
dist/lodash.underscore.min.js vendored
View File

@@ -4,36 +4,36 @@
* Build: `lodash underscore exports="amd,commonjs,global,node" -o ./dist/lodash.underscore.js`
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try{var c=Function("_","return "+a)(u)}catch(l){throw l.source=a,l}return r?c(r):(c.source=a,c)},o.unescape=function(n){return null==n?"":(n+"").replace(Gr,m)},o.uniqueId=function(n){var r=++rr+"";return n?n+r:r},o.all=R,o.any=C,o.detect=B,o.findWhere=function(n,r){return P(n,r,!0)},o.foldl=I,o.foldr=W,o.include=N,o.inject=I,o.first=V,o.last=function(n,r,t){var e=0,o=n?n.length:0;if(typeof r!="number"&&null!=r){var i=o;for(r=Q(r,t,3);i--&&r(n[i],i,n);)e++}else if(e=r,null==e||t)return n?n[o-1]:nr;
try{var l=Function("_","return "+a)(u)}catch(c){throw c.source=a,c}return r?l(r):(l.source=a,l)},o.unescape=function(n){return null==n?"":(n+"").replace(Gr,m)},o.uniqueId=function(n){var r=++rr+"";return n?n+r:r},o.all=N,o.any=C,o.detect=B,o.findWhere=function(n,r){return P(n,r,!0)},o.foldl=I,o.foldr=W,o.include=k,o.inject=I,o.first=V,o.last=function(n,r,t){var e=0,o=n?n.length:0;if(typeof r!="number"&&null!=r){var i=o;for(r=Q(r,t,3);i--&&r(n[i],i,n);)e++}else if(e=r,null==e||t)return n?n[o-1]:nr;
return u(n,Mr(0,o-e))},o.sample=function(n,r,t){return n&&typeof n.length!="number"&&(n=S(n)),null==r||t?n?n[0+Or(Ir()*(n.length-1-0+1))]:nr:(n=z(n),n.length=$r(Mr(0,r),n.length),n)},o.take=V,o.head=V,Z(o),o.VERSION="2.2.1",o.prototype.chain=function(){return this.__chain__=!0,this},o.prototype.value=function(){return this.__wrapped__},F("pop push reverse shift sort splice unshift".split(" "),function(n){var r=wr[n];o.prototype[n]=function(){var n=this.__wrapped__;return r.apply(n,arguments),Wr.spliceObjects||0!==n.length||delete n[0],this
}}),F(["concat","join","slice"],function(n){var r=wr[n];o.prototype[n]=function(){var n=r.apply(this.__wrapped__,arguments);return this.__chain__&&(n=new i(n),n.__chain__=!0),n}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(yr._=o, define(function(){return o})):mr&&_r?dr?(_r.exports=o)._=o:mr._=o:yr._=o}).call(this);

31
lodash.js
View File

@@ -2918,6 +2918,7 @@
if (!isObject(object)) {
return object;
}
// allows working with `_.reduce` and `_.reduceRight` without using
// their `index` and `collection` arguments
if (typeof args[2] != 'number') {
@@ -3797,7 +3798,12 @@
var computed = -Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3808,7 +3814,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -3867,7 +3873,12 @@
var computed = Infinity,
result = computed;
if (!callback && isArray(collection)) {
// allows working with functions like `_.map` without using
// their `index` argument as a callback
if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
callback = null;
}
if (callback == null && isArray(collection)) {
var index = -1,
length = collection.length;
@@ -3878,7 +3889,7 @@
}
}
} else {
callback = (!callback && isString(collection))
callback = (callback == null && isString(collection))
? charAtCallback
: lodash.createCallback(callback, thisArg, 3);
@@ -4052,8 +4063,8 @@
* @category Collections
* @param {Array|Object|string} collection The collection to sample.
* @param {number} [n] The number of elements to sample.
* @param- {Object} [guard] Allows working with functions, like `_.map`,
* without using their `key` and `object` arguments as sources.
* @param- {Object} [guard] Allows working with functions like `_.map`
* without using their `index` arguments as `n`.
* @returns {Array} Returns the random sample(s) of `collection`.
* @example
*
@@ -4595,7 +4606,7 @@
// juggle arguments
if (typeof isShallow != 'boolean' && isShallow != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isShallow] === array) ? isShallow : null;
callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
isShallow = false;
}
if (callback != null) {
@@ -4949,7 +4960,7 @@
end = start;
start = 0;
}
// use `Array(length)` so engines, like Chakra and V8, avoid slower modes
// use `Array(length)` so engines like Chakra and V8 avoid slower modes
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
var index = -1,
length = nativeMax(0, ceil((end - start) / (step || 1))),
@@ -5210,7 +5221,7 @@
// juggle arguments
if (typeof isSorted != 'boolean' && isSorted != null) {
thisArg = callback;
callback = !(thisArg && thisArg[isSorted] === array) ? isSorted : null;
callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
isSorted = false;
}
if (callback != null) {
@@ -6865,7 +6876,7 @@
// expose Lo-Dash
var _ = runInContext();
// some AMD build optimizers, like r.js, check for condition patterns like the following:
// some AMD build optimizers like r.js check for condition patterns like the following:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lo-Dash to the global object even when an AMD loader is present in
// case Lo-Dash was injected by a third-party script and not intended to be

11
test/test.js
View File

@@ -917,7 +917,7 @@
deepEqual(args, [klass]);
});
test('`_.' + methodName + '`should support the `thisArg` argument', 1, function() {
test('`_.' + methodName + '` should support the `thisArg` argument', 1, function() {
var actual = func('a', function(value) {
return this[value];
}, { 'a': 'A' });
@@ -4668,7 +4668,7 @@
deepEqual(args, expected);
});
test('`_.' + methodName + '`should support the `thisArg` argument', 1, function() {
test('`_.' + methodName + '` should support the `thisArg` argument', 1, function() {
var actual = func(array, function(num, index) {
return -this[index];
}, array);
@@ -4676,6 +4676,13 @@
equal(actual, methodName == 'max' ? 1 : 3);
});
test('`_.' + methodName + '` should work when used as `callback` for `_.map`', 1, function() {
var array = [[2, 3, 1], [5, 6, 4], [8, 9, 7]],
actual = _.map(array, func);
deepEqual(actual, methodName == 'max' ? [3, 6, 9] : [1, 4, 7]);
});
test('`_.' + methodName + '` should iterate an object', 1, function() {
var actual = func({ 'a': 1, 'b': 2, 'c': 3 });
equal(actual, methodName == 'max' ? 3 : 1);