// => [{ 'user': 'barney', 'age': 36, 'active': true }]. Creates a function that invokes func with arguments reversed. (string): Returns the camel cased string. brightness_4 The iteratee is invoked with one argument; (index). Removes leading and trailing whitespace or specified characters from string. multi level group by, lodash, collections. This method is like _.sortedIndex except that it accepts iteratee which is invoked for value and each element of array to compute their sort ranking. Any additional arguments provided to the function are appended to those provided to the wrapper. The iteratee is invoked with three arguments: (value, key, object). This method is like _.uniqBy except that it's designed and optimized for sorted arrays. Checks if value is classified as a boolean primitive or object. // => Logs 'done saving!' Result values are chosen from the first array in which the value occurs. Versions. 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. (boolean): Returns true if value is a buffer, else false. Pads string on the left and right sides if it's shorter than length. Of course you can use this code multiple times. (Object): Returns the new inverted object. 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. Pads string on the left side if it's shorter than length. 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. Maybe there was a change to the library, but your first examples output comes out in the group order expected. Subsequent sources overwrite property assignments of previous sources.Note: This method mutates object. 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. Here is the incoming JSON layout. Its creation may be customized by replacing the _.memoize.Cache constructor with one whose instances implement the Map method interface of clear, delete, get, has, and set. The predicate is invoked with three arguments: (value, index, array).Note: Unlike _.filter, this method mutates array. Creates a function that invokes func with the this binding of the created function and arguments from start and beyond provided as an array.Note: This method is based on the rest parameter. Group the pairs by the _.head () (the key). Converts the characters "&", "<", ">", '"', and "'" in string to their corresponding HTML entities.Note: No other characters are escaped. Executes the chain sequence to resolve the unwrapped value. (boolean): Returns true if value is a safe integer, else false. Subsequent sources overwrite property assignments of previous sources.Note: This method mutates object and is loosely based on Object.assign. The opposite of _.pickBy; this method creates an object composed of the own and inherited enumerable string keyed properties of object that predicate doesn't return truthy for. The arity of func may be specified if func.length is not sufficient.The _.curry.placeholder value, which defaults to _ in monolithic builds, may be used as a placeholder for provided arguments.Note: This method doesn't set the "length" property of curried functions. The customizer is invoked with five arguments: (objValue, srcValue, key, object, source).Note: This method mutates object. What's the elegant way to both group and sum values, resulting into: [{ dep: 'A', qt: 15, price: 61.5 }, { dep: 'B', qt: 3, price: 2.20 }, { dep: 'C', qt: 5: price: 44 } ] javascript underscore.js lodash. Creates a clone of the chain sequence planting value as the wrapped value. 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. Creates an array of grouped elements, the first of which contains the first elements of the given arrays, the second of which contains the second elements of the given arrays, and so on. (boolean): Returns true if object is a match, else false. This method is like _.union except that it accepts iteratee which is invoked for each element of each arrays to generate the criterion by which uniqueness is computed. Checks if value is in collection. Converts string, as a whole, to lower case just like String#toLowerCase. Shortcut fusion is an optimization to merge iteratee calls; this avoids the creation of intermediate arrays and can greatly reduce the number of iteratee executions. The sign of -0 is preserved. (Function): Returns the new spec function. Recursively flatten array up to depth times. (Array): Returns the array of property values. Creates an array of the own and inherited enumerable string keyed property values of object.Note: Non-object values are coerced to objects. While this is often used for adding numbers, it can return anything, including an object built with the values from an array. Checks if value is classified as a Map object. The _.groupBy () method creates an object composed of keys generated from the results of running each element of collection through the iteratee function. The order of grouped values is determined by the order they occur in collection. If a setting object is given, it takes precedence over _.templateSettings values.Note: In the development build _.template utilizes sourceURLs for easier debugging.For more information on precompiling templates see lodash's custom builds documentation.For more information on Chrome extension sandboxes see Chrome's extensions documentation. 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