TypeScript中是否有类似于C#实现的foreach构造？

Question

我真的很喜欢foreach在C#中使用"for循环" 的构造.我认为它非常干净,高效且易读.

TypeScript中是否有类似的构造？例如,而不是这样:

setAuthorFilters(selectedAuthors)
{
    selectedAuthors.forEach(x => this.setAuthorFilter(x));
    this.updateUrl();        
}

setAuthorFilter(selectedAuthor)
{
    this.vm.SelectAuthors = this.vm.SelectAuthors.filter(x => x.id !== selectedAuthor.id);
    this.vm.PreviousSelectedAuthors = this.vm.CurrentSelectedAuthors.slice();
    this.vm.CurrentSelectedAuthors.push(selectedAuthor);
}

我想这样做:

setAuthorFilters(selectedAuthors)
{
    foreach(var selectedAuthor in selectedAuthors)
    {
        this.vm.SelectAuthors = this.vm.SelectAuthors.filter(x => x.id !== selectedAuthor.id);
        this.vm.PreviousSelectedAuthors = this.vm.CurrentSelectedAuthors.slice();
        this.vm.CurrentSelectedAuthors.push(selectedAuthor);
    }
    this.updateUrl();        
}

Answer 1

是的 for ... of

例如

for(let author of authors)
{ 
  ... 
}

因为您使用的是TypeScript,所以这也适用于IE.请参阅https://basarat.gitbooks.io/typescript/content/docs/for...of.html:

对于ES6之前的目标,TypeScript将为(var i = 0; i <list.length; i ++)类型的循环生成标准.

在普通的Javascript中,所以没有Typescript,IE(源代码)不支持

更新:对于范围界定let更类似于C#而不是var.更新了示例.