Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-02-09 10:27:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use native Object.create when available, optimize the creation of lodash instances, and ensure methods like forEach return the existing wrapper object when chaining, instead of creating a new one.

Browse Source 
Former-commit-id: fa9ec371ba23ce8c35c15a66dd9b1f09f183b3a9
This commit is contained in:
John-David Dalton
2013-03-03 01:19:04 -08:00
parent aa49ce5c56
commit 8825a094ae
3 changed files with 104 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
build.js
View File

@@ -381,21 +381,26 @@
].join('\n' + indent);
});
// add `__chain__` checks to `_.mixin`
source = source.replace(matchFunction(source, 'mixin'), function(match) {
return match.replace(/^( *)return new lodash.+/m, function() {
var indent = arguments[1];
return indent + [
'',
'var result = func.apply(lodash, args);',
'if (this.__chain__) {',
' result = new lodash(result);',
' result.__chain__ = true;',
'}',
'return result;'
].join('\n' + indent);
});
});
// replace `_.mixin`
source = replaceFunction(source, 'mixin', [
'function mixin(object) {',
' forEach(functions(object), function(methodName) {',
' var func = lodash[methodName] = object[methodName];',
'',
' lodash.prototype[methodName] = function() {',
' var args = [this.__wrapped__];',
' push.apply(args, arguments);',
'',
' var result = func.apply(lodash, args);',
' if (this.__chain__) {',
' result = createWrapper(result);',
' result.__chain__ = true;',
' }',
' return result;',
' };',
' });',
'}'
].join('\n'));
// replace wrapper `Array` method assignments
source = source.replace(/^(?: *\/\/.*\n)*( *)each\(\['[\s\S]+?\n\1}$/m, function(match, indent) {
@@ -1174,7 +1179,7 @@
// remove `noCharByIndex` from `_.toArray`
source = source.replace(matchFunction(source, 'toArray'), function(match) {
return match.replace(/noCharByIndex[^:]+:/, '');
return match.replace(/(return\b).+?noCharByIndex[^:]+:\s*/, '$1 ');
});
// `noCharByIndex` from `iteratorTemplate`
@@ -1753,7 +1758,7 @@
if (isModern) {
// remove `_.isPlainObject` fallback
source = source.replace(matchFunction(source, 'isPlainObject'), function(match) {
return match.replace(/!getPrototypeOf.+?: */, '');
return match.replace(/!getPrototypeOf[^:]+:\s*/, '');
});
if (!isMobile) {
@@ -1927,7 +1932,7 @@
' }',
' var isArr = className == arrayClass;',
' if (!isArr) {',
' if (a.__wrapped__ || b.__wrapped__) {',
' if (a instanceof lodash || b instanceof lodash) {',
' return isEqual(a.__wrapped__ || a, b.__wrapped__ || b, stackA, stackB);',
' }',
' if (className != objectClass) {',
@@ -1989,6 +1994,19 @@
'}'
].join('\n'));
// replace `lodash`
source = replaceFunction(source, 'lodash', [
'function lodash(value) {',
' if (value instanceof lodash) {',
' return value;',
' }',
' if (!(this instanceof lodash)) {',
' return new lodash(value);',
' }',
' this.__wrapped__ = value;',
'}'
].join('\n'));
// replace `_.omit`
source = replaceFunction(source, 'omit', [
'function omit(object) {',
@@ -2189,7 +2207,7 @@
// remove conditional `charCodeCallback` use from `_.max` and `_.min`
_.each(['max', 'min'], function(methodName) {
source = source.replace(matchFunction(source, methodName), function(match) {
return match.replace(/!callback *&& *isString\(collection\)[\s\S]+?: */g, '');
return match.replace(/(return\b).+?callback *&& *isString[^:]+:\s*/g, '$1 ');
});
});
@@ -2469,9 +2487,14 @@
' lodash[methodName] = func;',
'',
' lodash.prototype[methodName] = function() {',
' var args = [this.__wrapped__];',
' var value = this.__wrapped__,',
' args = [value];',
'',
' push.apply(args, arguments);',
' return new lodash(func.apply(lodash, args));',
' var result = func.apply(lodash, args);',
" return (value && typeof value == 'object' && value == result)",
' ? this',
' : createWrapper(result);',
' };',
'});'
].join('\n' + indent);