Q. How do you create Immutable Arrays in JavaScript? Ans. There are multiple ways to create immutable arrays in JavaScript. One common approach is to use the spread operator (...) to create a copy of an existing array. Other methods include using array methods like map, filter, and conca...
Immutable([1, 2, 3]) // An immutable array containing 1, 2, and 3.Beyond the usual Array fare, the following methods have been added.flatMapvar array = Immutable(["here", "we", "go"]); Immutable.flatMap(array, function(str) { return [str, str, str]; }); // returns ...
While Immutable.js is inspired by Clojure, Scala, Haskell and other functional programming environments, it's designed to bring these powerful concepts to JavaScript, and therefore has an Object-Oriented API that closely mirrors that ofES2015Array,Map, andSet. The difference for the immutable colle...
This is possible because Immutable.js can treat any JavaScript Array or Object as a Collection. You can take advantage of this in order to get sophisticated collection methods on JavaScript Objects, which otherwise have a very sparse native API. Because Seq evaluates lazily and does not cache in...
This is possible because Immutable.js can treat any JavaScript Array or Object as a Collection. You can take advantage of this in order to get sophisticated collection methods on JavaScript Objects, which otherwise have a very sparse native API. Because Seq evaluates lazily and does not cache ...
function readonly(table) return setmetatable({}, { -- set the index as provided table __index = table, -- prevent new index to be added __newindex = function(table, key, value) error("ReadOnly Array. Permission denied.") end, -- setmetatable, getmetatable methods are not allowed _...
Almost all of the methods onArraywill be found in similar form onImmutable.List, those ofMapfound onImmutable.Map
it('efficiently chains array methods', () => { const v = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14); const r = v .filter(x => x % 2 === 0) .skip(2) .map(x => x * x) .take(3) .reduce((a: number, b: number) => a + b, 0); expe...
List继承自Collection.Indexed,同时实现了Deque,能够高效地从首部或者尾部添加或者删除数据。基本操作与javascript Array类似。更多操作请参看List API // javascript 数组 constplainArray = [1,2,3,4]; constlistFormPlainArray =Immutable.List(plainArray); ...
The various withXXX methods can be combined as desired by chaining them together.transit.withExtraHandlers(Array handlers) => transitAlso transit.handlers.withExtraHandlers(Array handlers) => handlers Create a modified version of the transit API that knows about more types than it did before. ...