function spread(array) {let queue = new Queue();for (let people of array) {queue.enqueue(people);}while (queue.size() > 1) {for (let i = 0; i < 6; i++) {let first = queue.dequeue(); //第一个元素移除队列queue.enqueue(first); //刚刚出列的元素进入队列}queue.dequeue();}re...
Usepop()to Remove an Array Item in TypeScript pop()has similar functionality asshift(), but the difference between the two functions is that whileshift()removes the first element of an array,pop()removes the last element of an array and returns it. ...
element */ removeFront(): T { if (this.isEmpty()) { return undefined; } const result = this.items.get(this.lowestCount); this.items.delete(this.lowestCount); this.lowestCount++; return result; } /** * @description: 在count方向(队列底部)出队 * @return {T} element */ removeBack(...
4.3 instanceof 关键字 interfacePadder{getPaddingString():string;}classSpaceRepeatingPadderimplementsPadder{constructor(privatenumSpaces:number){}getPaddingString(){returnArray(this.numSpaces+1).join(" ");}}classStringPadderimplementsPadder{constructor(privatevalue:string){}getPaddingString(){returnthis.valu...
const s = firstElement<string>(['a','b','c']) // s is string const n = firstElement<number>([1,2,3]) // n is number 调用的时候也可以不指明返回类型,可以自动的根据实参推断出类型变量的类型 const n = firstElement([1,2,3]) // n is number ...
默认参数 type A<T=string> = Array<T> 泛型支持函数嵌套 比如: type CutTail<Tuple extends any[]> = Reverse<CutHead<Reverse<Tuple>>>; 如上代码中, Reverse 是将参数列表反转,CutHead 是将数组第一项切掉。因此 CutTail 的意思就是将传递进来的参数列表反转,切掉第一个参数,然后反转回来。换句话说就...
* 开头的版权信息"removeComments":true,// 可配合 gulp-typescript 生成相应的 .d.ts 文件"declaration":true,// 启用所有严格类型检查选项。启用 --strict 相当于启用 --noImplicitAny, --noImplicitThis, --alwaysStrict, --strictNullChecks, --strictFunctionTypes 和 --strictPropertyInitialization"strict"...
This is effectively same as the previous section. Just return a array of nodes including itself and other sibling nodes.Removing a nodeWhat if you don't want a specific node anymore? Return an undefined!if (ts.isImportDeclaration(node)) { // Will remove all import declarations return ...
Let's consider another program first: letitems=[1,2,3];items.forEach(arg=>console.log(arg)); This is isomorphic to the example that "wanted" an error. At runtime,forEachinvokes the given callback with three arguments (value, index, array), but most of the time the callback only us...
For example, if we wanted to write a type to get the element types of nested arrays, we could write the followingdeepFlattentype. Copy typeElementType<T>=TextendsReadonlyArray<inferU>?ElementType<U>:T;functiondeepFlatten<Textendsreadonlyunknown[]>(x:T):ElementType<T>[]{throw"not implemented...