C# check if specific word in string is equal to any word in array-CodePudding

I'm trying to check if a certain word in a string is equal to any of the strings in an array

What i tried doing, which as you could tell, does not work.

string[] friends = new string[3] {"bob", "greg", "jeb"};
if("does bob like cake?" == $"does {friends} like cake?") {
    Console.WriteLine("yes, he does");
}
else {
    Console.WriteLine("i don't know who that is");
}

Is there any way of doing this without having to loop through every string in the array?

CodePudding user response：

One way or another, you need to check all the items until such time you get a true. For this you can use Any:

string[] friends = new string[3] {"bob", "greg", "jeb"};
if(friends.Any(f => "does bob like cake?" == $"does {f} like cake?")) {
    Console.WriteLine("yes, he does");
}
else {
    Console.WriteLine("i don't know who that is");
}

Live example: https://dotnetfiddle.net/4BldBo

CodePudding user response：

You need to check if your particular friend name is contained in the list, There is a method "Contains" for this.

string[] friends = new string[3] {"bob", "greg", "jeb"};
var friendName = "bob";
if (friends.Contains(friendName)) {
{
   Console.WriteLine("yes, he does");
}
else {
   Console.WriteLine("i don't know who that is");
}

If you know, your friend Name (bob in this case) is always the second word in the string, then you could do

var question = "does bob like cake?";
var questionArray = question.Split(); // Split by white space
var friendName = questionArray[1]; // Get the name of your friend
if (friends.Contains(friendName)) {
{
   Console.WriteLine("yes, he does");
}
else {
   Console.WriteLine("i don't know who that is");
}

CodePudding user response：

Getting the word out of string and comparing it with other array members may help.

string[] friends = new string[3] {"bob", "greg", "jeb"};
var secondWord = str.Split(' ')[1];
foreach(var friend in friends)
{
if(secondWord == friend) {
    Console.WriteLine("yes, he does");
}
else {
    Console.WriteLine("i don't know who that is");
}    
}

CodePudding user response：

Assuming that he knows which word to check since he stated "a certain word" and not "any word", then the following function might work:

void CheckString(string stringToCheck, string[] friends, int indexOfWordToCheck)
{
   var delimiters = new [] {' ', '.', ',', ':', ';', '?', '!'};  
   if(friends.Contains(stringToCheck.Split(delimiters)[indexOfWordToCheck]))
   {  
      Console.WriteLine("yes, he/she does!");
   }
   else
   {
      Console.WriteLine("who is that?");
   }
}

Usage:

CheckString("Does bob like cake?", new [] { "bob", "greg", "jeb" }, 1);

CodePudding user response：

If any word of the question can be the frind's name, I would:

string[] friends = new string[3] {"bob", "greg", "jeb"};
string question = "does bob like cake?";

string[] questionWords = question.Split(' ');

var matchingNames = friends.Intersect(questionWords);