Another approach to convert binary data to a bytearray is by using theArray.frommethod. TheArray.frommethod creates a new array from an iterable object or array-like object. We can utilize this method to iterate over the binary data and create a bytearray. Here is an example implementation:...
Here are 4 ways to convert the returned HTMLCollection to an array. Convert to array using a spread operator Aspread operatorwill allow us to expand the values of our array-like object and push them into a new array. This works because the HTMLCollection is iterable. The code looks something...
constobj =Object.fromEntries(iterableOverKeyValuePairs); Array.from(): constarr =Array.from(iterable); new Map()和new WeakMap(): constm =newMap(iterableOverKeyValuePairs);constwm =newWeakMap(iterableOverKeyValuePairs); new Set()和new WeakSet(): consts =newSet(iterableOverElements);constw...
ES6 Array adds two new static methods for creating arrays:from()andof().from()used to convert a class array to an array, andof()used to convert a set of parameters to an array. Array.form() Create a new array instance from an array-like object or an iterable object. Array.form()c...
var arrayLike = { 0: 'Cat', 1: 'Bird', length: 2 }; // Conform to Iterable Protocol arrayLike[Symbol.iterator] = iterator; var array = [...arrayLike]; console.log(array); // => ['Cat', 'Bird'] arrayLike[Symbol.iterator]为该对象创建了值为某个迭代器的属性,从而使该对象符合了...
这个EZArray 子类定义了两个简单的 getter 方法。EZArray 的实例表现得像普通数组,我们可以使用继承的方法和属性,比如push()、pop()和length。但我们也可以使用子类中定义的first和last getter。不仅实例方法像pop()被继承了,静态方法像Array.isArray也被继承了。这是 ES6 类语法启用的一个新特性:EZArray()是一...
array function constfoo = [1,2];constbar = foo; bar[0] =9;console.log(foo[0], bar[0]);// => 9, 9 ⬆ back to top References 2.1Useconstfor all of your references; avoid usingvar. eslint:prefer-const,no-const-assign
}// Map a range of integers to their squares and convert to an array[...map(newRange(1,4),x=>x*x)]// => [1, 4, 9, 16]// Return an iterable object that filters the specified iterable,// iterating only those elements for which the predicate returns truefunctionfilter(iterable, ...
const obj = { answer: 42 };// This throws an error because objects are **not** iterable// "TypeError: undefined is not a function"new Map(obj);// Works, you need to use `Object.entries()` to convert the object// to a key/value arrayconst map = new Map(Object.entries(obj));...
to their squares and convert to an array[...map(new Range(1,4), x => x*x)] // => [1, 4, 9, 16]// Return an iterable object that filters the specified iterable,// iterating only those elements for which the predicate returns truefunction filter(iterable, predicate) {let ...