小编say*_*tri的帖子

我正在学习 LINQ，我想使用 LINQ 找到第三个最高薪水。我知道如何查询集合，但我不知道如何解决这个问题

void Main()
{
    List<Employee> employees = new List<Employee>();
    employees.Add(new Employee { Id = 1, Name = "John Doe", Salary = 1500 });
    employees.Add(new Employee { Id = 1, Name = "John Wow", Salary = 10000 });
    employees.Add(new Employee { Id = 1, Name = "Bill", Salary = 1000 });
    employees.Add(new Employee { Id = 1, Name = "Jane Doe", Salary = 2000 });

    var secondHighestSalary=from e in employees
                select e ----

}

public class Employee
{ …

我在猫鼬中有以下模型，其中博客有很多评论

   var mongoose = require('mongoose')

        , Schema = mongoose.Schema

    var blogScheam = Schema({
        title: String,
        comments: [{ type: Schema.Types.ObjectId, ref: 'Comment' }]
    });

    module.exports = mongoose.model('Post', blogScheam);

评论模型

var mongoose = require('mongoose')

    , Schema = mongoose.Schema

var commentSchema = Schema({
    comment: String,
    user: { type: Schema.Types.ObjectId, ref: 'User' }
});


module.exports = mongoose.model('Comment', commentSchema);

用户模式

var mongoose = require('mongoose')

    , Schema = mongoose.Schema

var userScheam = Schema({
    name: String,
    age: Number,
    posts: [{ type: Schema.Types.ObjectId, ref: 'Post' }]
});


module.exports …

我的api在一个http调用中返回20个结果,但我想要40个记录同样我正在进行嵌套的http调用,如下所示.我能够获取40个记录,但是当我订阅getALl()方法时,我只得到20个结果;

getAll() {
    return this._http.get(this.baseURL)
      .do((data: any) => {
        this.nextPage = data.next_page_token;
        var results = data.results;
        return this._http.get(`${this.baseURL}?next=${this.nextPage}`).delay(2000).do((d: any) => {
           return Observable.of(results.concat(d.results));
        });
  });
}