CODEWITHSUNDEEP
c#string
alix54
alix54

Reputation: 474

If The Beginning Of A String Is Equal To Another

i have a list that contains : {"something1","something2","somefoo","bar"}

I created a foreach loop to check for each string.

string input = "thing";
foreach(string word in list) //list = {"something1","something2","somefoo","bar"}
{
    if (word.StartContains(input))
          return;
}

So as you can see i want to check if my input string contains in the string in the list. The result i want is i don't want to get returned in this code.

What StartContains have to do ??

This method needs to check if the first letters are equal to the input, Not the entire word like what Contains() do.

I just have no idea to how to create this...

Thanks,

Upvotes: 0

Views: 516

Answers (5)

bgura
bgura

Reputation: 869

You could use String.StartsWith

Determines whether the beginning of this string instance matches the specified string.

Upvotes: 3

Felix D.
Felix D.

Reputation: 5093

As others have already pointed out, String.StartsWith() is what you are looking for.

But you could also create your own ExtensionMethod for that

public static bool StartsWith(this string baseString, string stringToFind, int lettersToMatch)
{        
    for(int i = 0; i < lettersToMatch; i++)
    {
        if(baseString[i] != stringToFind[i])
        {
            return false;
        }
    }
    return true;
}

You then can call it like this:

bool startsWithMyName = "mynameisfelix".StartsWith("mynameisthomas", 8);  // true 
startsWithMyName = "mynameisfelix".StartsWith("mynameisthomas", 10);      // false

So you could simply ajust the amount of letters you want to match.

Upvotes: 0

AndyC
AndyC

Reputation: 1335

Use 

String.StartsWith("string")

In your example. 

    string input = "thing";
    foreach(string word in list) //list = {"something1","something2","somefoo","bar"}
    {
        if (word.StartsWith(input))
        {
            // TODO: Do Something with the word here.
        }
    }

Here is a running sample to show off how it works. https://dotnetfiddle.net/mNVK1u

Upvotes: 1

Supraj V
Supraj V

Reputation: 977

Check this

var list = new List<string>();
                list.Add("something1");
                list.Add("domething1");
                list.Add("romething1");
                list.Add("yomething1");
                string input = "thing";
                char[] inputchars = input.ToCharArray();
                foreach (string word in list) //list = {"something1","something2","somefoo","bar"}
                {
                    char[] characters = word.ToCharArray();

                    if (inputchars[0] == characters[0])
                        list.Remove(word);
                }
                return list;

Upvotes: 0

Wheels73
Wheels73

Reputation: 2890

The below will create you a list of all entries that match your input.

    var input = "som";

    var strings = new List<string>()
    {"something1","something2","somefoo","bar"};

    var stringsThatMatch = strings.Where(item => item.StartsWith(input)).ToList();

Upvotes: 1

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