OrderedMap 有序的键值对集合,对应于原生 Map 一个常见的 immutable.js 在redux 中应用: // 初始化状态 const initialStore = fromJS({ todoList: [ { title: '任务一', complete: false, }, { title: '任务二', complete: false, }, ], }); // reducer
问ImmutableJS地图或OrderedMap更改位置ENEasyCVR平台支持海量视频汇聚管理，能兼容多类型的设备接入，可覆盖...
Immutable.js provides many Persistent Immutable data structures including: List, Stack, Map, OrderedMap, Set, OrderedSet and Record.These data structures are highly efficient on modern JavaScript VMs by using structural sharing via hash maps tries and vector tries as popularized by Clojure and Scala...
let normalArr = Array.apply([], typedArr ); //类型数组转为普通数组 扩展Set,Map,WeakMap,WeakSet,WeakRef Set Set对象是值的集合,你可以按照插入的顺序迭代它的元素。 Set中的元素只会出现一次,即 Set 中的元素是唯一的。 v8实现 就是一个OrderedHashTable 有序的hasTable 并且 each item is an offset...
不可变的JS是指在JavaScript中创建或更新嵌套在Map中的列表时,不改变原始数据结构,而是创建一个新的数据结构。这种方法可以确保数据的不可变性,避免出现意外的副作用和错误。 在JavaScr...
myMap.toSeq().filter(somePred).sort(someComp).toOrderedMap() Since Immutable.js never directly mutates given data, it always needs to make another copy of it, performing multiple iterations like this can be very expensive. Seq is lazy immutable sequence of data, meaning it will perform as...
Immutable.js provides many Persistent Immutable data structures including: List, Stack, Map, OrderedMap, Set, OrderedSet and Record. These data structures are highly efficient on modern JavaScript VMs by using structural sharing via hash maps tries and vector tries as popularized by Clojure and Scal...
。ImmutableJS给的远不止这些，它提供了7种不可变的数据结构：List, Stack, Map, OrderedMap, Set, ...
Immutable.js provides many Persistent Immutable data structures including: List, Stack, Map, OrderedMap, Set, OrderedSet and Record. These data structures are highly efficient on modern JavaScript VMs by using structural sharing via hash maps tries and vector tries as popularized by Clojure and Scal...
$.map $.map(collection, function(item, index){ ... }) ⇒ collection 通过遍历集合中的元素,返回通过迭代函数的全部结果,(愚人码头注:一个新数组)null 和undefined 将被过滤掉。 $.map([1,2,3,4,5],function(item,index){ if(item>1){return item*item;} }); // =>[4, 9, 16, ...