C#•2y ago

❔ empty string not being recognized

string name = nameHolder.text;
if (String.IsNullOrEmpty(name))
{
    name = "New Save";
}

string name = nameHolder.text;
if (String.IsNullOrEmpty(name))
{
    name = "New Save";
}

I started with if(name == "") tried string.Empty but when give it an empty name, and in debug I can see its an empty string, the statement is always false. I am using unity, am I missing something obvious?

39 Replies

mtreit•2y ago

Print out the length - is it definitely zero? Because no, that code should work if the string is actually empty.

Sal•2y ago

Sal•2y ago

Sal•2y ago

i can try that

mtreit•2y ago

I don't always trust the debugger...

Sal•2y ago

it has 1 "length" thats odd because i also print the "name" and shows empty (nothing apears)

mtreit•2y ago

Try IsNullOrWhitespace Might be something like a newline character? Or convert it to a char[] and see what the char value is.

Sal•2y ago

didnt work

mtreit•2y ago

What's the char value?

Sal•2y ago

i will see now

Unknown User•2y ago

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mtreit•2y ago

The suspense is killing me

Unknown User•2y ago

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Sal•2y ago

Sal•2y ago

mtreit•2y ago

Need the numeric value

Sal•2y ago

this means its a "? weird to me

mtreit•2y ago

(int)name[0]

(int)name[0]

Get that So we can figure out what character it actually is

Sal•2y ago

8203

Unknown User•2y ago

Message Not Public

mtreit•2y ago

zero width space

Sal•2y ago

ZERO WIDTH SPACE ups yeps i never knew it existed

mtreit•2y ago

I'm surprised IsNullOrWhitespace doesn't handle that.

333fred•2y ago

ZWSP is not part of the space category iirc

Sal•2y ago

at least the mystery is solved.. dont understand why this would be a default for empty input on anything ! i was completely lost

Unknown User•2y ago

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Sal•2y ago

thanks guys, great help

MODiX•2y ago

mtreit#6470

REPL Result: Success

using System;
char c = (char)8203;
var s = new string(new char[] { c });
Console.WriteLine(string.IsNullOrWhiteSpace(s));

using System;
char c = (char)8203;
var s = new string(new char[] { c });
Console.WriteLine(string.IsNullOrWhiteSpace(s));

Console Output

False

False

Compile: 561.203ms | Execution: 63.676ms | React with ❌ to remove this embed.

mtreit•2y ago

IT HAS SPACE IN THE NAME! 😛

333fred•2y ago

Blame the unicode consortium

Sal•2y ago

btw why would we want a non character?

Unknown User•2y ago

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mtreit•2y ago

That is a tricky one - the debugger showing it as an empty string really makes it kind of non-obvious.

Sal•2y ago

because thats what it "looks" like

Unknown User•2y ago

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333fred•2y ago

https://unicode-explorer.com/c/200B

U+200B ZERO WIDTH SPACE - Unicode Explorer

U+200B ZERO WIDTH SPACE, copy and paste, unicode character symbol info, commonly abbreviated ZWSP, this character is intended for invisible word separation and for line break control; it has no width, but its presence between two characters does not prevent increased letter spacing in justification

Unknown User•2y ago

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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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❔ empty string not being recognized