VB.NET 在数组中查找字符串
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VB.NET Find a string in an Array
提问by CromeX
I am new to VB.net, usually a Python or Matlab programmer.I have begun programming in VB.Net. I am battling to reference an index of a string in an array without looping through a for loop
我是 VB.net 的新手，通常是 Python 或 Matlab 程序员。我已经开始在 VB.Net 中编程。我正在努力在不遍历 for 循环的情况下引用数组中字符串的索引
How can I find an entry in an array in one line? My thinking is this..
如何在一行中找到数组中的条目？我的想法是这样..
Dim indx As Integer
Dim MyArray() As String
indx = MyArray.find("ThisEntry")
or the index of
或索引
indx = MyArray.indexof("ThisEntry")
So far all I have found is function describing a method directly after you declare the variable? Am I missing something? or does the logic not make sense?
到目前为止，我发现的只是在声明变量后直接描述方法的函数？我错过了什么吗？或者逻辑没有意义？
回答by Carlos Landeras
Do it this way, after you have some content on your array, that now is empty:
这样做，在您的阵列上有一些内容后，现在是空的：
Dim result As String = Array.Find(MyArray, Function(s) s = "ThisEntry")
To get the index:
获取索引：
Dim index As Integer = Array.FindIndex(MyArray, Function(s) s = "ThisEntry")
回答by Douglas Barbin
Dim MyArray() As String = {"a", "ThisEntry", "b"}
Dim indx As Integer = MyArray.ToList().IndexOf("ThisEntry")
回答by the_lotus
IndexOf works, you're just not using it correctly.
IndexOf 有效，只是您没有正确使用它。
Dim arr As String() = {"aa", "bb", "cc"}
index = Array.IndexOf(arr, "bb")
回答by Yaugen Vlasau
Sub Main()
Dim numbers As String() = {"aaa", "bbb", "ccc"}
Console.WriteLine(numbers.ToList().FindIndex(Function(x) x = "bbb"))
End Sub
