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Strings Contain Empty Strings
source link: https://www.stevefenton.co.uk/2021/03/strings-contain-empty-strings/
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Strings Contain Empty Strings
This is just one of those philosophical moments in programming where one small details can have a big impact. In C# / .NET you will find that when you ask if a string contains an empty string (string.Empty), the answer is yes. This may seem logically surprising so it is worth bearing in mind should you be comparing strings.
// True bool isMatch = "some string".Contains(string.Empty);
A more realistic example is below, imagine you have a config file with some value, and the value isn’t set for some environment… every comparison made will match.
private string GetItem(string item) {
// True
bool isMatch = item.Contains(_config.RudeWord);
return isMatch ? string.Empty : item;
}
Posted bySteve Fenton16th March 2021Posted inProgrammingTags:c#
Published by Steve Fenton
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