我试图找出最简单的方法，从命令行在Swift 4中发出HTTP请求。我从URLSession programming guide复制了这段代码，并添加了几个打印语句。我无法弄清楚为什么print("Testing URLSession")
let sessionWithoutADelegate = URLSession(configuration: URLSessionConfiguration.default)
if let url = URL(string: "https://www.example.com/") {
print("Encoded url \(url)")
(sessionWithoutADelegate.dataTask(with: url) { (data, response, error) in
print("Executing dataTask")
if let error = error {
print("Error: \(error)")
} else if let response = response,
let data = data,
let string = String(data: data, encoding: .utf8) {
print("Response: \(response)")
print("DATA:\n\(string)\nEND DATA\n")
}
}).resume()
}
没有执行。
GET目标是从REST API中检索数据，但我甚至无法使一个简单的executeAsync()请求正常工作......
答案 0 :(得分：3)
我终于找到了如何使用public class test2{
public static class Node<T>{
public T data;
public Node<T> next;
public Node(T data, Node<T> next)
{
this.data = data;
this.next = next;
}
}
static Node[] array = new Node[10];
public static void add(String word){
int position = hashFunction(word);
if(array[position] == null){
array[position] = new Node(word, null);
}else{
new Node(word, array[position]);
}
}
public static int hashFunction(String a){
int sum = 1;
for(int i = 0; i<a.length(); i++){
char b = a.charAt(i);
int value = (int) b;
sum *= value;
}
return sum % array.length;
}
public static void main(String[] args) {
add("abc");
add("acb");
add("bca");
add("bac");
add("cba");
System.out.println(array[4].next);
}
}
：
CFRunLoop