C#•2y ago

❔ Help with strings

I put it here because I think it is a quick and very basic question, I have a string with a specific series of letters and I want to check that another string that the user writes by console can ONLY have letters of that string. How can I do it? I mean this is what I have so far but it doesn't work. In the first case I want to be able to enter only those numbers and then I want to be able to enter only one of those letters but it is not well done.

11 Replies

Angius•2y ago

Loops Loop over one string Inside loop over the other Basically, compare each character of one string with each character of the other If the first letter of the string you want to check isn't any of the characters you want to check for, return false from the method If it is, check the second letter If you can go over all the letters, return true

AriieSiiSOP•2y ago

ok, thanks, I thought it would be easier without having to do that but i guess is not happenning I'll see if I can fix it and post it here in a little while, but thanks.

Angius•2y ago

I mean, you can use LINQ .All() with .Contains() should do the trick

AriieSiiSOP•2y ago

I cant I have to do it in a "rudimentary" way, is the aim of the exercise.

Angius•2y ago

Loops it is, then

MODiX•2y ago

Diddy#2634

REPL Result: Success

var allowed = "ABCDE";

Console.WriteLine(
    "ABCDE".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);


Console.WriteLine(
    "ABCDEFG".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

var allowed = "ABCDE";

Console.WriteLine(
    "ABCDE".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);


Console.WriteLine(
    "ABCDEFG".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

Console Output

False
True

False
True

Compile: 557.327ms | Execution: 73.035ms | React with ❌ to remove this embed.

Aaron•2y ago

not like that it doesn't

MODiX•2y ago

Windows10CE#8553

REPL Result: Success

var allowed = "ABCDE";

Console.WriteLine(
    "A".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

var allowed = "ABCDE";

Console.WriteLine(
    "A".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

Console Output

True

True

Compile: 602.280ms | Execution: 34.077ms | React with ❌ to remove this embed.

Aaron•2y ago

pretty sure you wanted the char[] version

MODiX•2y ago

Windows10CE#8553

REPL Result: Success

char[] allowed = "ABCDE".ToCharArray();

Console.WriteLine(
    "A".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

char[] allowed = "ABCDE".ToCharArray();

Console.WriteLine(
    "A".Split(allowed, StringSplitOptions.RemoveEmptyEntries).Length > 0
);

Console Output

False

False

Compile: 540.183ms | Execution: 73.077ms | React with ❌ to remove this embed.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Help with strings