I am trying to select an element in array, that matches something in a string.
For example:
string[] splitChar = new string[] { "+=", "-=" };
string content = "5+=2";
So i want to check if content, contains something from splitChar, and if it does then select the value so it can be assigned to a string variable.
Lambdas and LINQ would be overkill for this. You can just do a simple foreach:
string match = "";
foreach (var str in splitChar)
{
if (content.Contains(str))
{
match = str;
break;
}
}
if (!String.IsNullOrEmpty(match))
{
// Do whatever with `match`
}
If you really wanted to use LINQ, though, FirstOrDefault would be your best bet:
string match = splitChar.FirstOrDefault(s => content.Contains(s));
if (!String.IsNullOrEmpty(match))
{
// Do whatever with `match`
}
for or foreach loop will do the same job just as effectively. This is production code, not code golf. If intent needs to be expressed, add comments.
I don't like throwing around LINQ methods just because I can when a simple for or foreach loop will do the same job just as effectively. In my opinion, LINQ is the easier way to implement simple iterations. It cuts down on nesting and unnecessarily long foreach statements for e.g. a simple filtering action, and it increases readability (once you understand the basics behind lambdas). LINQ really shines when you can process every item of a list separately and the outcome of processing one row does not influence another row's outcome.Have you tried checking with FirstOrDefault like the following?
string[] splitChar = new string[] { "+=", "-=" };
string content = "5+=2";
var stringPresent = splitChar.FirstOrDefault(x=>content.Contains(x));
if(String.IsNullOrEmpty(stringPresent))
Console.WriteLine("Not found");
else
Console.WriteLine(stringPresent);
Check this Example
5+=2-=1?