Checks if path is a direct property of object. Creates a function that invokes func with partials prepended to the arguments it receives. The iteratee is invoked with one argument: (value). // Sort by `user` in ascending order and by `age` in descending order. The order of result values is determined by the order they occur in the array. Exemplos Esses exemplos demonstram funcionalidades do ES5.1, ES2015 e ES2016, ficaram tão simples que você não precisa de uma biblioteca externa mais. I myself enjoys its functional way to process collections, es But Lodash’s _.map is more powerful, in that it works on objects, has iteratee / predicate shorthands, lazy evaluation, guards against null parameter, and has better performance. Creates a function that returns the value at path of a given object. If object is a map or set, its entries are returned. Any additional arguments provided to the function are appended to those provided to the wrapper. The iteratee is invoked with one argument:(value). Clamps number within the inclusive lower and upper bounds. Checks if value is classified as a Set object. Elements are dropped until predicate returns falsey. If end is not specified, it's set to start with start then set to 0. Creates an object composed of keys generated from the results of running each element of collection thru iteratee. Performs a deep comparison between two values to determine if they are equivalent.Note: This method supports comparing arrays, array buffers, booleans, date objects, error objects, maps, numbers, Object objects, regexes, sets, strings, symbols, and typed arrays. Checks if value is array-like. Checks if predicate returns truthy for any element of collection. This method is like _.forEach except that it iterates over elements of collection from right to left. (boolean): Returns true if value is empty, else false. The predicate is invoked with three arguments: (value, index|key, collection).Note: Unlike _.remove, this method returns a new array. If array is empty or falsey, undefined is returned. (Array): Returns the new array of regrouped elements. If array can't be split evenly, the final chunk will be the remaining elements. Gets the next value on a wrapped object following the iterator protocol. Data properties may be accessed as free variables in the template. Checks if value is an empty object, collection, map, or set.Objects are considered empty if they have no own enumerable string keyed properties.Array-like values such as arguments objects, arrays, buffers, strings, or jQuery-like collections are considered empty if they have a length of 0. // line numbers in error messages and stack traces. This method is like _.lastIndexOf except that it performs a binary search on a sorted array. Many lodash methods are guarded to work as iteratees for methods like _.reduce, _.reduceRight, and _.transform. This method is like _.clone except that it recursively clones value. (Function): Returns the new composite function. This method is like _.cloneWith except that it recursively clones value. The iteratee is invoked with one argument: (value). "Cross-browser" is the primary reason why developers choose jQuery. Creates a function that invokes iteratees with the arguments it receives and returns their results. lodash.min is 60% (1.60x) faster than underscore-min. Creates a function that invokes func with the this binding of the create function and an array of arguments much like Function#apply.Note: This method is based on the spread operator. The order of grouped values is determined by the order they occur in collection. (boolean): Returns true if value is a boolean, else false. About Lodash Discover Lodash Libraries and Widgets tool - Top alternatives, customer information and buyer intent data. This method is like _.assign except that it iterates over own and inherited source properties.Note: This method mutates object. Arrays are created for missing index properties while objects are created for all other missing properties. 意訳が含まれるため、誤りやより良い表現などがあればご指摘頂けると助かります。, 原文:https://github.com/cht8687/You-Dont-Need-Lodash-Underscore, LodashとUnderscoreは素晴らしいモダンなJavaScriptユーティリティライブラリであり、フロントエンド開発者に広く使われています。しかしながら、モダンブラウザがターゲットとなる場合、ES5やES6のおかげでネイティブにサポートされたメソッドが多くあることに気づくでしょう。プロジェクトの依存関係を減らし、ターゲットブラウザが明確になっているのであれば、LodashとUnderscoreは必要ないかも知れません。, ** ES5メソッドでレガシーJavaScriptエンジンをターゲットに含めるのであれば、es5-shimを使うと良いでしょう。 If path is a function, it's invoked for, and this bound to, each element in collection. (boolean): Returns true if value is a finite number, else false. Uses a binary search to determine the lowest index at which value should be inserted into array in order to maintain its sort order. Result values are chosen from the first array in which the value occurs. Checks if value is classified as a WeakMap object. This method is like _.findKey except that it iterates over elements of a collection in the opposite order. The predicate is invoked with two arguments: (value, key). Creates an array of elements, sorted in ascending order by the results of running each element in a collection thru each iteratee. (boolean): Returns true if object conforms, else false. The performance difference you see here is almost always … Creates an array of own enumerable string keyed-value pairs for object which can be consumed by _.fromPairs. (boolean): Returns true if value is an error object, else false. (boolean): Returns true if the values are equivalent, else false. The predicate is invoked with three arguments: (value, index, array). O que eu Checks value to determine whether a default value should be returned in its place. (string): Returns the capitalized string. // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed). The first and most important thing is speed. This method is like _.forIn except that it iterates over properties of object in the opposite order. Creates an array of the own and inherited enumerable string keyed property values of object.Note: Non-object values are coerced to objects. Source objects are applied from left to right. Creates a flattened array of values by running each element in collection thru iteratee and flattening the mapped results. (boolean): Returns true if value is array-like, else false. (Function): Returns the new debounced function. If customizer returns undefined, cloning is handled by the method instead. (Array): Returns the new array of combined values. Checks if value is an integer.Note: This method is based on Number.isInteger. The sign of -0 is preserved. Creates an array of elements split into groups the length of size. Truncates string if it's longer than the given maximum string length. (Object): Returns the new inverted object. The comparator is invoked with two arguments: (arrVal, othVal).Note: Unlike _.differenceWith, this method mutates array. GitHub Gist: instantly share code, notes, and snippets. Creates a lodash wrapper instance with explicit method chain sequences enabled. The comparator is invoked with two arguments: (arrVal, othVal).Note: Unlike _.pullAllWith, this method returns a new array. If end is not specified, it's set to start with start then set to 0.Note: JavaScript follows the IEEE-754 standard for resolving floating-point values which can produce unexpected results. '; // Use the `source` property to inline compiled templates for meaningful. Performs a partial deep comparison between object and source to determine if object contains equivalent property values.Note: This method is equivalent to _.matches when source is partially applied.Partial comparisons will match empty array and empty object source values against any array or object value, respectively. (Function): Returns the new negated function. (boolean): Returns true if string ends with target, else false. The iteratee is invoked with one argument: (value). This method is like _.pullAll except that it accepts iteratee which is invoked for each element of array and values to generate the criterion by which they're compared. Creates an array of values corresponding to paths of object. Creates a function that invokes the method at path of a given object. The own enumerable properties of arguments objects are cloned as plain objects. The predicate is invoked with one argument: (value). The iteratee is invoked with three arguments: (value, index|key, collection). (Object): Returns the composed aggregate object. Ces librairies sont Underscore et Lodash, Lodash étant un sur-ensemble d’Underscore apportant encore plus de fonctionnalités. This method invokes interceptor and returns value. (RegExp): Used to detect data property values to be HTML-escaped. This method is like _.xor except that it accepts comparator which is invoked to compare elements of arrays. (boolean): Returns true if string starts with target, else false. Converts the first character of string to upper case. Talvez você não precise de lodash ou Underscore. (boolean): Returns true if value is an arguments object, else false. If customizer returns undefined path creation is handled by the method instead. Creates an object composed of keys generated from the results of running each element of collection thru iteratee. (number): Returns the index of the matched value, else -1. Assigns own enumerable string keyed properties of source objects to the destination object. 最初のカウント数分呼び出された後に実行される関数のバージョンを作成します。次に進む前に、全ての非同期呼び出しが完了したことを確認するための非同期応答のグルーピングに役立ちます。. // => objects for ['barney', 'fred', 'pebbles'], // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }], // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }], // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }], // => [['a', 'b'], [1, 2], [true, false]], // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }], // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }. This method is like _.forOwn except that it iterates over properties of object in the opposite order. Repeat calls to the function return the value of the first invocation. The iteratee is invoked with one argument: (value). Iteratee functions may exit iteration early by explicitly returning false. A step of -1 is used if a negative start is specified without an end or step. A value is considered array-like if it's not a function and has a value.length that's an integer greater than or equal to 0 and less than or equal to Number.MAX_SAFE_INTEGER. // Avoid costly calculations while the window size is in flux. Creates an array of function property names from own and inherited enumerable properties of object. Subsequent sources overwrite property assignments of previous sources.Note: This method mutates object and is loosely based on Object.assign. The comparator is invoked with two arguments: (arrVal, othVal). (boolean): Returns true if value is a map, else false. This method is like _.pull except that it accepts an array of values to remove.Note: Unlike _.difference, this method mutates array. (Function): Returns the new capped function. Replaces matches for pattern in string with replacement.Note: This method is based on String#replace. Checks if string ends with the given target string. Converts string, as a whole, to upper case just like String#toUpperCase. If fromIndex is negative, it's used as the offset from the end of collection. Gets the timestamp of the number of milliseconds that have elapsed since the Unix epoch (1 January 1970 00:00:00 UTC). The interceptor is invoked with one argument; (value). // Use the `imports` option to import `jQuery` as `jq`. (Function): Returns the new throttled function. The iteratee is invoked with three arguments: (value, key, object). Generates a unique ID. If customizer returns undefined, assignment is handled by the method instead. // Avoid excessively updating the position while scrolling. Creates an array of the own and inherited enumerable property names of object.Note: Non-object values are coerced to objects. (boolean): Returns true if value is a string, else false. Lodash is a well-known JavaScript utility library that makes it easy to manipulate arrays and objects, as well as functions, strings, etc. Creates a function that invokes func with the this binding of thisArg and partials prepended to the arguments it receives.The _.bind.placeholder value, which defaults to _ in monolithic builds, may be used as a placeholder for partially applied arguments.Note: Unlike native Function#bind, this method doesn't set the "length" property of bound functions. (Function): Returns the new spec function. // Underscore/Lodash console. Converts value to an integer.Note: This method is loosely based on ToInteger. This method is the wrapper version of _.reverse.Note: This method mutates the wrapped array. If floating is true, or either lower or upper are floats, a floating-point number is returned instead of an integer.Note: JavaScript follows the IEEE-754 standard for resolving floating-point values which can produce unexpected results. This method is like _.bind except it does not alter the this binding.The _.partial.placeholder value, which defaults to _ in monolithic builds, may be used as a placeholder for partially applied arguments.Note: This method doesn't set the "length" property of partially applied functions. The func is invoked with the this binding of the memoized function.Note: The cache is exposed as the cache property on the memoized function. ", "*", "+", "? (Function): Returns the new bound function. Converts string, as space separated words, to upper case. lodash empry array lodash get vs native for large json lodash find index in array of objects lodash is object array of arrays lodash _.reject if field in array lodash loop return same element of the other array in lodash lodash data The predicate-function pairs are invoked with the this binding and arguments of the created function. The opposite of _.pick; this method creates an object composed of the own and inherited enumerable property paths of object that are not omitted.Note: This method is considerably slower than _.pick. So this will not be a getting started post on lodash, or javaScript in general. Checks if n is between start and up to, but not including, end. If customizer returns undefined, comparisons are handled by the method instead. Binds methods of an object to the object itself, overwriting the existing method.Note: This method doesn't set the "length" property of bound functions. The iteratee is invoked with four arguments:(accumulator, value, index|key, collection).Many lodash methods are guarded to work as iteratees for methods like _.reduce, _.reduceRight, and _.transform.The guarded methods are:assign, defaults, defaultsDeep, includes, merge, orderBy, and sortBy. This method is like _.range except that it populates values in descending order. 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