TCL string range command —WHAT IF SCENARIO

[Duy Nguyen]

If I were to use the string range command and specified 0 and 2 as my first and last range of characters to pull, what would happen if the string was less than 3 characters?  

I am basically wanting to compare only the first 3 characters of a variable/field.  Would the string range command be best suited for something like this?  I’m open to suggestions.  Thanks.

Topic

[Vincent Tran]

Hm, from reading this http://wiki.tcl.tk/10168” class=”bbcode_url”>http://wiki.tcl.tk/10168

It says

Quote:

if last is greater than or equal to the length of the string then it is treated as if it were end.

So if you had a string less than three characters like “ab”, then it would return “ab”

[Duy Nguyen]

thank you, sir.

[Russ Ross]

FYI:  you can run hcitcl interactively at the command prompt on your cloverleaf server, which is very useful for answering these types of questions.

Attached is a sceen shot illustrating my interactive session with hcitcl that I used to perform a simple test to see how it behaves for the question you posted.

Russ Ross
RussRoss318@gmail.com

[Author]

Replies