Host Engineering Forum

General Category => Do-more CPUs and Do-more Designer Software => Topic started by: Bolt on August 19, 2019, 07:47:19 PM

Title: Empty String Compare Statement
Post by: Bolt on August 19, 2019, 07:47:19 PM

Is there an easy way to tell if a string is empty?  I don't think STRCMP can do it, without setting a dummy string to be empty.  And I also can't create a Symbolic Constant with a string content.  What am I missing?

Title: Re: Empty String Compare Statement
Post by: Andrew S on August 19, 2019, 10:00:44 PM

Quote from: Bolt on August 19, 2019, 07:47:19 PM

without setting a dummy string to be empty.

That's what I do. Works just fine.

Andrew.

Title: Re: Empty String Compare Statement
Post by: ATU on August 19, 2019, 11:04:24 PM

You could also use the ISCLEAR function

Title: Re: Empty String Compare Statement
Post by: franji1 on August 20, 2019, 06:34:25 AM

The string has a .Length member, so in an equal-to contact, do
MyString.Length = 0

Title: Re: Empty String Compare Statement
Post by: Bolt on August 20, 2019, 07:20:12 PM

Quote from: franji1 on August 20, 2019, 06:34:25 AM

The string has a .Length member, so in an equal-to contact, do
MyString.Length = 0

Doh!  I already did that in other parts of my program, not sure why that didn't register with me.  Thanks!