## Misc #16114

### Naming of "beginless range"

**Description**

#14799 introduces a "beginless range" to complement the already existing "endless range". However, "beginless" isn't an existing word in English. Since the term for something without a beginning is "beginingless", I'd propose renaming "beginless range" to "beginningless range".

**Related issues**

#### Updated by mrkn (Kenta Murata) 7 months ago

Other candidates from mathematics:

- a range bounded below
- lower-unbounded range
- left-unbounded range

If we use "unbounded" for the minimum value of a range, we should rephrase "endless" with the following candidates:

- a range bounded above
- upper-unbounded range
- right-unbounded range

#### Updated by mame (Yusuke Endoh) 7 months ago

I know that it is an awkward word, but it came from `Range#begin`

and `Range#end`

. IMO, you can call it as you like.

#### Updated by mame (Yusuke Endoh) 7 months ago

**Related to***Feature #15864: Proposal: Add methods to determine if it is an infinite range*added

#### Updated by duerst (Martin Dürst) 7 months ago

mrkn (Kenta Murata) wrote:

Other candidates from mathematics:

- a range bounded below

Shouldn't this be "a range not bounded below"?

- lower-unbounded range
- left-unbounded range
If we use "unbounded" for the minimum value of a range, we should rephrase "endless" with the following candidates:

- a range bounded above

Same thing here.

#### Updated by mrkn (Kenta Murata) 7 months ago

duerst (Martin Dürst) wrote:

mrkn (Kenta Murata) wrote:

Other candidates from mathematics:

- a range bounded below
Shouldn't this be "a range not bounded below"?

Oops! The correct candidates are "a range unbounded below" and "a range unbounded above".

Thanks.

#### Updated by shevegen (Robert A. Heiler) 7 months ago

This shows that there are only two real problems in computer science:

- Giving things proper names
- Documenting code after the code has been written
- Off by one errors

:P

From the candidates, I somewhat like mrkn's suggestion here:

lower-unbounded range

I am not sure if it is an ideal candidate, but to me it conveys

a similar meaning as "beginless", in that it refers to the

"lower" area of a range - well, the part where it all begins. :P

(You can also use left/right, but I think if we only compare

lower/upper to left/right, to me lower/upper makes a bit more

sense than left/right, within this context.)

Note that I find "beginningless" to be a very clumsy word as well.

Obviously that word exists (example: https://en.wiktionary.org/wiki/beginningless)

but I find it ... awkward.

I do not have any real preference either way so, to be completely honest,

I am with mame here - I don't think it is that important, at the least not

that I would dwell that much thought on it. Thinking about good names is

often quite difficult - just look at HashWithIndifferentAccess.

#### Updated by inopinatus (Joshua GOODALL) 6 months ago

I hope this discussion leads to Ruby having Ranges congruent to all the mathematical intervals.

Today we have right-unbounded ranges, and left-unbounded ranges, and right-closed ranges, and left-closed ranges, and right-open ranges -- but no left-open ranges.

This is strange to me. It is like having the <, <=, >= operators, and forgetting >.

I think "beginningless" might be cumbersome. I would smile if the term "bottomless" was adopted.

#### Updated by jeremyevans0 (Jeremy Evans) 6 months ago

**Backport**deleted ()*2.5: UNKNOWN, 2.6: UNKNOWN***Tracker**changed from*Bug*to*Misc*