小编HiD*_*ing的帖子

因此,我的老师通常会在一些在线工具上为我们分配问题,例如hackerrank for practice.目前有一个特定问题阻碍了我,问题如下.

一所学校正在举办一场比赛,以测试学生的知识.成立了一个由五名学生组成的团队,每个学生都熟练掌握学校提供的五个科目之一.在学校教授的科目是物理(p),化学(c),数学(m),植物学(b),动物学(z).每个团队可以有五个学生,一个学生不能在两个团队中,每个团队每个科目只有一个人.所以团队中不可能有两个擅长物理学的人.

我的任务是,给出一个字符串,该字符串与纯粹由某个科目中的技能确定的学生列表有关,确定可以形成多少个团队.

例如,

pcmpcmbbbzz将返回2 pcmpp将返回0

static int differentTeams(String skills) {
    char [] c1 = skills.toCharArray();
    //number of students that can be on a team
    int max = 5;
    //create set of characters for any team instance which can be max of 5
    Set<Character> teamSet = new HashSet<Character>();
    //create set of used characters or indexs in this string
    Set<Integer> insertedSet = new HashSet<Integer>();
    int i = 0;
    int numberOfTeams = 0;
    //iterate through the array of chars
    while(i …

所以我试图通过像这样子类化它来创建一个UIBarButtonItem自定义UIView。

import UIKit
import SnapKit

class LocationManager: UIBarButtonItem {

    let createdView = UIView()
    lazy var currentCityLabel: UILabel = {
        let currentCityLabel = UILabel()
        currentCityLabel.text = "Philadelphia, PA"
        guard let customFont = UIFont(name: "NoirPro-SemiBold", size: 20) else {
            fatalError("""
        Failed to load the "CustomFont-Light" font.
        Make sure the font file is included in the project and the font name is spelled correctly.
        """
            )
        }
        currentCityLabel.adjustsFontForContentSizeCategory = true
        return currentCityLabel
    }()

    lazy var downArrow: UIImageView = { …

当我尝试创建自己的 podfile 时，我对为什么会发生此错误感到困惑

我在这里关注本教程

https://ronakshah.org/How-To-Make-A-Cocoapod-With-Dependencies/

但是，当我尝试为最后一步运行 pod install 时，它给了我这个错误

无效VideoRow.podspec文件：“TLPhotoPicker”的未定义方法`join'：字符串

    Pod::Spec.new do |s|
  s.name             = 'VideoRow'
  s.version          = '0.1.0'
  s.summary          = 'Eureka row that allows us to take or select a video.'
  s.description      = <<-DESC
This is an add-on to the many rows that are in the Eureka Community. This row will allow users to select a video from there library to export to a backend service of there choosing.
                       DESC
  s.homepage         = 'https://github.com/EurekaCommunity/VideoRow'
  s.license          = { :type …

因此，我尝试在操场上使用JSON Decodable从api端点获取数据。我已经按照步骤创建了该结构，并使其符合要求Decodable。

import Foundation


struct Weather: Decodable {
    let latitude: String
    let longitude: String
    let timezone: String
    let offset: Int
    let currently : Currently

    init(latitude: String,longitude: String,timezone: String,offset: Int,currently : Currently) {
        self.latitude = latitude
        self.longitude = longitude
        self.timezone = timezone
        self.offset = offset
        self.currently = currently
    }

    enum CodingKeys: String, CodingKey {
        case currently = "currently",latitude = "latitude",longitude = "longitude",timezone = "timezone", offset = "offset"
    }

    }



struct Currently: Decodable {
    let time: Int
    let summary: String …