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Posted to users@netbeans.apache.org by Ernie Rael <er...@raelity.com> on 2020/05/20 23:06:02 UTC
OT: java map where key is in the value
Hi,
I've have a vague memory of a map implementation where the key is
extracted from the value on a put. I thought it was Java, but I can't
find it.
Am I hallucinating? More to the point, does anyone know of such a map.
I'm only using a few methods, so I could make a wrapper; but I like
using libraries...
-ernie
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Re: OT: java map where key is in the value
Posted by Owen Thomas <ow...@gmail.com>.
On Thu, 21 May 2020 at 12:57, Ernie Rael <er...@raelity.com> wrote:
> On 5/20/2020 7:43 PM, Owen Thomas wrote:
> > Hi Ernie.
> >
> > I have desired such an implementation; this would be a map that worked
> > a little more like a set. However, I am unaware of such a beast in the
> > Java SE API, and in this case, one just grabs the key that the object
> > generates in a put through the use of a getKey method:
> > map.put(value.getKey(),value);
>
> Yes, thanks. That's like what I do, but I feel some obligation to scatter
>
> "assert key.equals(value.getKey())"
>
> around. With a lib, I would feel better...
>
Heheh... hmmm... yes, I understand the motivations, although that is a
little like making sure that the water you are pouring will indeed flow
down the hill.
Have a good day,
Owen.
--
I'll cut your code at an intensity and from a place of my own choosing.
Clique Space(TM). Anima ex machina.
Re: OT: java map where key is in the value
Posted by Ernie Rael <er...@raelity.com>.
On 5/20/2020 7:43 PM, Owen Thomas wrote:
> Hi Ernie.
>
> I have desired such an implementation; this would be a map that worked
> a little more like a set. However, I am unaware of such a beast in the
> Java SE API, and in this case, one just grabs the key that the object
> generates in a put through the use of a getKey method:
> map.put(value.getKey(),value);
Yes, thanks. That's like what I do, but I feel some obligation to scatter
"assert key.equals(value.getKey())"
around. With a lib, I would feel better...
>
> HTH.
>
> Owen.
>
> On Thu, 21 May 2020 at 09:06, Ernie Rael <errael@raelity.com
> <ma...@raelity.com>> wrote:
>
> Hi,
>
> I've have a vague memory of a map implementation where the key is
> extracted from the value on a put. I thought it was Java, but I can't
> find it.
>
> Am I hallucinating? More to the point, does anyone know of such a
> map.
> I'm only using a few methods, so I could make a wrapper; but I like
> using libraries...
>
> -ernie
>
>
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> To unsubscribe, e-mail: users-unsubscribe@netbeans.apache.org
> <ma...@netbeans.apache.org>
> For additional commands, e-mail: users-help@netbeans.apache.org
> <ma...@netbeans.apache.org>
>
> For further information about the NetBeans mailing lists, visit:
> https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists
>
>
>
> --
> I'll cut your code at an intensity and from a place of my own choosing.
> Clique Space(TM). Anima ex machina.
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Re: OT: java map where key is in the value
Posted by Owen Thomas <ow...@gmail.com>.
Hi Ernie.
I have desired such an implementation; this would be a map that worked a
little more like a set. However, I am unaware of such a beast in the Java
SE API, and in this case, one just grabs the key that the object generates
in a put through the use of a getKey method: map.put(value.getKey(),value);
HTH.
Owen.
On Thu, 21 May 2020 at 09:06, Ernie Rael <er...@raelity.com> wrote:
> Hi,
>
> I've have a vague memory of a map implementation where the key is
> extracted from the value on a put. I thought it was Java, but I can't
> find it.
>
> Am I hallucinating? More to the point, does anyone know of such a map.
> I'm only using a few methods, so I could make a wrapper; but I like
> using libraries...
>
> -ernie
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@netbeans.apache.org
> For additional commands, e-mail: users-help@netbeans.apache.org
>
> For further information about the NetBeans mailing lists, visit:
> https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists
>
>
--
I'll cut your code at an intensity and from a place of my own choosing.
Clique Space(TM). Anima ex machina.