我们如何在不使用循环的情况下匹配包含 C# 中数组的任何值的字符串？

Question

How can we match string contains any value of array in C# w/o using loop?

For example:

string[] abc= [val1,val2,val3] . string xyz= "demo string to check if it contains any value in abc array that is val2";

I want to check if any value of array abc exists in string xyz w/o using loop

Answer 1

one aproach may be linq

string[] abc = { "abc", "def", "xyz" }; 
string xyz = "demo string to check if it contains any value in abc array that is val2";
bool result = abc.Any(xyz.Contains); //true

but internal linq and contains uses loop - so i think there is no possible solution without a loop.

Answer 2

To search from/in a collection (read array), you need to use loops/iteration because collection is involved.

Even if you do not write a loop and write some syntactic sugar code, in the background it will use LOOP/ITERATION.

As others answered you can use LINQ or something but it will iterate over your collection.

Answer 3

There is already a contains function. you may use it like this

bool result=abc.Contains("walue to be checked");

Alternate way is by using LINQ

but both the method use internal loops.

Answer 4

you can check as :

string[] arr = { "abc", "bcd", "cde" };

if (arr.Contains("abc"))
{
    Console.WriteLine("Found");
}
else
{
    Console.WriteLine("Not Found");
}

For faster way you can use Array.IndexOf Method :

int pos = Array.IndexOf(arr, "abc");
if (pos > -1)
{
    // the array contains the string and the pos variable
    // will have its position in the array
}