C#•7mo ago

way to check if a string contains only alphabet

I need a line of code to check if a string contains only alphabet characters or whitespaces, what is the best way to do so

4 Replies

MODiX•7mo ago

arion

REPL Result: Success

var words = "Hello there";
words.All(x => char.IsLetter(x) || char.IsWhiteSpace(x))

var words = "Hello there";
words.All(x => char.IsLetter(x) || char.IsWhiteSpace(x))

Result: bool

True

True

Compile: 392.695ms | Execution: 53.353ms | React with ❌ to remove this embed.

arion•7mo ago

If you want it more structured you can extract the predicate

MODiX•7mo ago

arion

REPL Result: Success

var words = "Hello there";
var predicate = (char c) => char.IsLetter(c) || char.IsWhiteSpace(c);
words.All(predicate)

var words = "Hello there";
var predicate = (char c) => char.IsLetter(c) || char.IsWhiteSpace(c);
words.All(predicate)

Result: bool

True

True

Compile: 422.296ms | Execution: 55.121ms | React with ❌ to remove this embed.

arion•7mo ago

Regarding what the best way to do so is, that well, it depends. Is your interpretation of "best" speed? memory usage? how many lines of code? Linq is nice on the lines of code but there are memory implications and it might not be the fastest. You can try to write your own implementation to try to beat System.Linq's .All

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way to check if a string contains only alphabet