C# 打印任何类型的数组和列表的常用方法
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Common method for printing arrays and lists of any types
提问by shahensha
Whenever I am debugging a piece of code which involves arrays or lists of ints, doubles, strings, etc/, I prefer printing them over sometimes. What I do for this is write overloaded printArray / printList methods for different types.
每当我调试一段涉及整数、双精度、字符串等数组或列表的代码时，我有时更喜欢将它们打印出来。我为此所做的是为不同类型编写重载的 printArray / printList 方法。
for e.g.
例如
I may have these 3 methods for printing arrays of various types
我可能有这 3 种方法来打印各种类型的数组
public void printArray(int[] a);
public void printArray(float[] b);
public void printArray(String[] s);
Though this works for me, I still want to know whether it is possible to have a generic method which prints arrays/lists of any types. Can this also be extended to array/list of objects.
虽然这对我有用，但我仍然想知道是否有可能有一个打印任何类型的数组/列表的通用方法。这也可以扩展到对象的数组/列表。
采纳答案by Kirill
There is useful String.Join<T>(string separator, IEnumerable<T> values)method. You can pass array or list or any enumerable collection of any objects since objects will be converted to string by calling .ToString().
有一个有用的String.Join<T>(string separator, IEnumerable<T> values)方法。您可以传递数组或列表或任何对象的任何可枚举集合，因为对象将通过调用.ToString().
int[] iarr = new int[] {1, 2, 3};
Console.WriteLine(String.Join("; ", iarr)); // "1; 2; 3"
string[] sarr = new string[] {"first", "second", "third"};
Console.WriteLine(String.Join("\n", sarr)); // "first\nsecond\nthird"
回答by M.Babcock
Arrays and generic lists both implement IEnumerable<T>so just use it as your parameter type.
数组和泛型列表都实现了，IEnumerable<T>所以只需将它用作参数类型。
public void PrintCollection<T>(IEnumerable<T> col)
{
foreach(var item in col)
Console.WriteLine(item); // Replace this with your version of printing
}
回答by hago
you can make a generic method like this
你可以做一个这样的通用方法
public static void print<T>(T[] data)
{
foreach (T t in data) {
Console.WriteLine(t.ToString());
}
}
回答by Rohit Sharma
public void printArray<T>(IEnumerable<T> a)
{
foreach(var i in a)
{
Console.WriteLine(i);
}
}
回答by Mike Cowan
Here's an extension method appropriate for debugging:
这是一个适合调试的扩展方法：
[Conditional("DEBUG")]
public static void Print<T>(this IEnumerable<T> collection)
{
foreach(T item in collection)
{
Console.WriteLine(item);
}
}
