From: Joseph Jones <joeyi5216@...>
Date: 2015-12-17T21:27:47-07:00
Subject: [ruby-core:72353] [Ruby trunk - Feature #11797] [Open] `Enumerator#with_object` with multiple objects

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Joseph Jones liked your message with Boxer. On December 9, 2015 at 09:15:=
54 MST, sawadatsuyoshi=40gmail.com wrote:Issue =2311797 has been reported=
 by Tsuyoshi Sawada.----------------------------------------=46eature =23=
11797: =60Enumerator=23with=5Fobject=60 with multiple objectshttps://bugs=
.ruby-lang.org/issues/11797* Author: Tsuyoshi Sawada* Status: Open* Prior=
ity: Normal* Assignee: ----------------------------------------Sometimes,=
 when working with =60Enumerator=23with=5Fobject=60, I want to keep some =
additional temporary objects besides the one to return. A use case is as =
follows (I got this from this StackOverflow question: http://stackoverflo=
w.com/questions/3418123). Suppose I have an enumerator created from an ar=
ray: e =3D =5B=22a=22, =22b=22, =22c=22, =22c=22, =22a=22, =22c=22=5D.to=5F=
enumand want to get an array of its repeated elements in the order they a=
re repeated (i.e., appears for the second time): =23 =3D> =5B=22c=22, =22=
a=22=5DI can do it using =60Enumerator=23with=5Fobject=60 like this: e.to=
=5Fenum.with=5Fobject(=5B=7B=7D, =5B=5D=5D)=7B=7Cc, (h, a)=7C h=5Bc=5D =3F=
 a.push(c) : h.store(c, true)=7D.last.uniqHere, I am getting the array re=
ferred to as =60a=60 in the block, but besides that, I am using a tempora=
l hash =60h=60. I thought it would be nice if =60Enumerator=23with=5Fobje=
ct=60 accepts one or more objects, pass them individually as block argume=
nts, and returns only the last argument so that I can do this: e.to=5Fenu=
m.with=5Fobject(=7B=7D, =5B=5D)=7B=7Cc, h, a=7C h=5Bc=5D =3F a.push(c) : =
h.store(c, true)=7D.uniq-- https://bugs.ruby-lang.org/     
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<html><body><div>Joseph Jones liked your message with <a href=3D=22http:/=
/bxr.io/PBIqo=22>Boxer</a>.</div><br/><br/><div><div class=3D=22quote=22>=
On December 9, 2015 at 09:15:54 MST, sawadatsuyoshi=40gmail.com wrote:<br=
/><blockquote type=3D=22cite=22 style=3D=22border-left-style:solid;border=
-width:1px;margin-left:0px;padding-left:10px;=22>Issue =2311797 has been =
reported by Tsuyoshi Sawada.<br /><br />---------------------------------=
-------<br />=46eature =2311797: =60Enumerator=23with=5Fobject=60 with mu=
ltiple objects<br />https://bugs.ruby-lang.org/issues/11797<br /><br />* =
Author: Tsuyoshi Sawada<br />* Status: Open<br />* Priority: Normal<br />=
* Assignee: <br />----------------------------------------<br />Sometimes=
, when working with =60Enumerator=23with=5Fobject=60, I want to keep some=
 additional temporary objects besides the one to return. A use case is as=
 follows (I got this from this StackOverflow question: http://stackoverfl=
ow.com/questions/3418123). Suppose I have an enumerator created from an a=
rray:<br /><br />    e =3D =5B=22a=22, =22b=22, =22c=22, =22c=22, =22a=22=
, =22c=22=5D.to=5Fenum<br /><br />and want to get an array of its repeate=
d elements in the order they are repeated (i.e., appears for the second t=
ime):<br /><br />    =23 =3D> =5B=22c=22, =22a=22=5D<br /><br />I can do =
it using =60Enumerator=23with=5Fobject=60 like this:<br /><br />    e.to=5F=
enum.with=5Fobject(=5B=7B=7D, =5B=5D=5D)=7B=7Cc, (h, a)=7C h=5Bc=5D =3F a=
.push(c) : h.store(c, true)=7D.last.uniq<br /><br />Here, I am getting th=
e array referred to as =60a=60 in the block, but besides that, I am using=
 a temporal hash =60h=60. I thought it would be nice if =60Enumerator=23w=
ith=5Fobject=60 accepts one or more objects, pass them individually as bl=
ock arguments, and returns only the last argument so that I can do this:<=
br /><br />    e.to=5Fenum.with=5Fobject(=7B=7D, =5B=5D)=7B=7Cc, h, a=7C =
h=5Bc=5D =3F a.push(c) : h.store(c, true)=7D.uniq<br /><br /><br /><br />=
<br />-- <br />https://bugs.ruby-lang.org/<br /></blockquote></div></div>=
</body></html>
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