What is /00 in cods display?

[mshaske]

Was trying to get rid of whitespace in this expression "LOC "

Thought I had a whitespace at the end, or a tab. Tried deleting both and could not get it to go away.

Switched to codes display and got \00. What is this?

Thanks.

[BertMcMahan]

/00 is "null", or 0x00 in hex. You generally cannot type this with a normal keyboard in normal operation.

See code 0x00 here:

https://www.asciitable.com/

Basically, switch to /codes display, then you can delete it and then switch back.

How'd you get it in there anyway? Was it a string sent from another program or device? The reason I ask is because in some languages, strings are defined in memory as a "start" memory address, and the string is valid until it sees a Null character, or 0x00. These are called "null terminated" strings.

LabVIEW uses a different method, where it prepends the string length to the beginning of memory and doesn't need the null character to terminate the string. However, if you open a string from another program that DOES need the null terminator, you could wind up having a bunch of extra null characters in your string.

[crossrulz]

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@mshaske wrote:

Switched to codes display and got \00. What is this?

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A NULL character.  If you are interfacing with any C libraries, strings will be terminated with a NULL character.  You can get rid of it with a Match Pattern.

[Kyle97330]

You can use the "Printable?" function from the Comparison palette in LabVIEW to parse a string to more aggressively filter out characters like this, since the standard "Trim Whitespace" just looks for tab/linefeed/return/space.  That way it's a general way to trim anything, instead of a search specifically for "\00".