Is there a way to compare two strings to another string at once?
Example:
string1 == string2 && string3;
(I know this isn't the way, just a representation of what I mean)
3 Answers
Generally, no, there is no way to do this that resembles the way you asked to do it.
However, if the strings to compare with are in a collection of some kind, you can do this:
if (stringCollection.All(s => s == string1) )
5 Comments
Ricardo Appleton
That or
if (stringCollection.Any(s => s == string1) ). All returns true if all elements match. Any returns true if one or more elements match
Callum
Sorry just want to clarify, is that comparing all the strings in the collection to one another, or just one to all the others?
Joel Coehoorn
@Callum It compares one to all the others... but since you used an AND operator, it should match what your pseudocode was looking for here.
Ricardo Appleton
@Callum: the portion
(s => s... refers to your other strings, string2 and 3 which should be in a collectionCallum
@JoelCoehoorn Yeah that's what I was after, but since they aren't already in a collection it will probably be easier to just do two comparisons. Thanks anyway!
If you don't want to deal with putting your values into a collection or list, you could do an extension method like this:
static class extensions
{
private static bool InSet(this string s, params string[] p )
{
return p.Contains(s);
}
}
Then when you want to test if a string matches a value in a set you can do this:
if (String1.InSet(String2, String3))
{
// do something.
}
1 Comment
William Leader
I would like to add, that this solution works with any number of parameters.
Besides Linq's All method, you can do also with List methods, like TrueForAll
string searchString = "hi";
var listStrings = new List<string>() { "hi", "there" };
bool allOfThem = listStrings.TrueForAll(x => x == searchString);
bool atLeastOne = listStrings.Contains(searchString);
&or&&? stackoverflow.com/questions/35301&looks like the VB.NET concatenation operator. Is that intended?string1 == string2 == string3??(string1 == string2)is bool then(bool) == string3.