Talk:Empty string

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Untitled

This could benefit from attention by an expert in theoretical computer science. Since I'm not even close to that, I'll just make it a bit more readable. Charlie.liban (talk) 17:50, 12 February 2008 (UTC)[reply]

Added a bit explaining the difference between null and "", though I couldn't find a concise way of explaining the difference. Modifications welcome! And I'm supposed to be a computer scientist ... 199.43.13.100 (talk) 14:20, 3 July 2008 (UTC)[reply]

Empty strings exist as an additive identity element, both in formal language theory (at least the theory that I took!) and in programming languages. They're just another string, but they happen to have interesting properties - much like 0 for algebra. I guess the confusion comes from the empty part: empty sets (which might be referred to as null sets) have zero elements; empty strings (confusingly called null strings) have zero symbols. On top of this, there are a whole slew of slightly different concepts related to null.

charlie liban (talk) 20:05, 8 July 2008 (UTC)[reply]

Empty String v Language

Hi, at the moment the empty language page redirects to this empty string page. This page correctly notes that they should not be confused (!), if somebody with more wikipedia knowledge than me could create the page for 'Empty language' and create a stub for it, that would be great! — Preceding unsigned comment added by 118.93.63.129 (talk) 03:13, 7 April 2012 (UTC)[reply]

Fixed [1] [2]. Incnis Mrsi (talk) 08:48, 7 April 2012 (UTC)[reply]

So what term indicates a non-null string?

It comes up in programming so often, that a string is 'not null' and/or 'not empty', it seems strange we don't have a term for it, like 'full string' or something. Unfortunately, 'valid string' doesn't work because it implies validation, not mere non-emptiness.