CODEWITHSUNDEEP
c#asp.netends-with
jtsoftware
jtsoftware

Reputation: 543

What's wrong with my usage of String.EndsWith?

I can't figure out why EndsWith is returning false.

I have the C# code:

string heading = "yakobusho";
bool test = (heading == "yakobusho");
bool back = heading.EndsWith("​sho");
bool front = heading.StartsWith("yak");
bool other = "yakobusho".EndsWith("sho");
Debug.WriteLine("heading = " + heading);
Debug.WriteLine("test = " + test.ToString());
Debug.WriteLine("back = " + back.ToString());
Debug.WriteLine("front = " + front.ToString());
Debug.WriteLine("other = " + other.ToString());

The output is:

heading = yakobusho
test = True
back = False
front = True
other = True

What is going on with EndsWith?

Upvotes: 1

Views: 193

Answers (3)

Dave
Dave

Reputation: 2180

In your EndsWith argument there is a special character.

As you can see from this code:

  class Program
  {
    static void Main(string[] args)
    {
      string heading = "yakobusho";

      string yourText = "​sho";
      bool back = heading.EndsWith(yourText);

      Debug.WriteLine("back = " + back.ToString());
      Debug.WriteLine("yourText length = " + yourText.Length);

      string newText = "sho";
      bool backNew = heading.EndsWith(newText);

      Debug.WriteLine("backNew = " + backNew.ToString());
      Debug.WriteLine("newText length = " + newText.Length);

    }
  }

OUTPUT:

back = False
yourText length = 4
backNew = True
newText length = 3

The length of yourText is 4 and so there is some hidden character in this string.

Hope this helps.

Upvotes: 0

Panagiotis Kanavos
Panagiotis Kanavos

Reputation: 131180

The "​sho" string in the third line starts with a zero length space. "​sho".Length returns 4 while ((int)"​sho"[0]) returns 8203, the Unicode value of the zero length space.

You can type it in a string using its hex code, eg :

"\x200Bsho"

Annoyingly, that character isn't considered whitespace so it can't be removed with String.Trim().

Upvotes: 1

Tor
Tor

Reputation: 631

This contains an invisible character before the "sho" string:

bool back = heading.EndsWith("​sho");

The corrected line:

bool back = heading.EndsWith("sho");

Upvotes: 4

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