[#40602] [ruby-trunk - Bug #5532][Open] Compile problem for bigdecimal on cygwin — Martin Dürst <duerst@...>

14 messages 2011/11/01

[#40617] [ruby-trunk - Feature #5534][Open] Redefine Range class and introduce RelativeNumeric and RelativeRange — Alexey Muranov <muranov@...>

17 messages 2011/11/01

[#40646] [ruby-trunk - Bug #5541][Open] Better configure error message when llvm-gcc is the default compiler — Eric Hodel <[email protected]>

10 messages 2011/11/01

[#40648] [ruby-trunk - Feature #5543][Open] rb_thread_blocking_region() API is poorly designed — Christopher Huff <cjameshuff@...>

14 messages 2011/11/01

[#40684] [ruby-trunk - Feature #5555][Open] rename #include? to #includes? — Alexey Muranov <muranov@...>

20 messages 2011/11/02

[#40688] [ruby-trunk - Bug #5556][Open] SIGHUP no longer ignored when sent to process group from a subprocess — Brian Ford <brixen@...>

12 messages 2011/11/02

[#40706] [ruby-trunk - Feature #5562][Open] Improvement of Windows IO performance — Hiroshi Shirosaki <h.shirosaki@...>

39 messages 2011/11/03

[#40737] [ruby-trunk - Bug #5570][Open] Encoding of environment variables on Windows — Nikolai Weibull <now@...>

11 messages 2011/11/04

[#40748] Proposal for sustainable branch maintenance — "Yuki Sonoda (Yugui)" <yugui@...>

-----BEGIN PGP SIGNED MESSAGE-----

14 messages 2011/11/05

[#40770] [ruby-trunk - Feature #5578][Open] Embedded YAML for Ruby 2.0 — Thomas Sawyer <transfire@...>

17 messages 2011/11/06

[#40806] [ruby-trunk - Feature #5583][Open] Optionally typing — Yasushi ANDO <andyjpn@...>

21 messages 2011/11/07

[#40824] [ruby-trunk - Feature #5588][Open] add negation flag (v) to Regexp — Suraj Kurapati <sunaku@...>

38 messages 2011/11/08

[#40865] IO.copy_stream creates files with restrictive permissions — Eric Wong <normalperson@...>

I'm not sure if this is a bug or intended as spec.

16 messages 2011/11/09
[#41151] Re: IO.copy_stream creates files with restrictive permissions — Tanaka Akira <akr@...> 2011/11/19

2011/11/9 Eric Wong <[email protected]>:

[#41166] Re: IO.copy_stream creates files with restrictive permissions — KOSAKI Motohiro <kosaki.motohiro@...> 2011/11/20

>> I noticed when a file name argument is passed to the IO.copy_stream, the

[#41168] Re: IO.copy_stream creates files with restrictive permissions — Clifford Heath <clifford.heath@...> 2011/11/20

On 20/11/2011, at 5:09 PM, KOSAKI Motohiro wrote:

[#41176] Re: IO.copy_stream creates files with restrictive permissions — Tanaka Akira <akr@...> 2011/11/21

2011/11/20 Clifford Heath <[email protected]>:

[#41180] Re: IO.copy_stream creates files with restrictive permissions — KOSAKI Motohiro <kosaki.motohiro@...> 2011/11/21

>> I think documentation is the wrong answer. The security defects are not caused

[#40908] [ruby-trunk - Feature #5607][Open] Inconsistent reaction in Range of String — Yen-Nan Lin <redmine@...>

15 messages 2011/11/10

[#40941] [ruby-trunk - Feature #5617][Open] Allow install RubyGems into dediceted directory — Vit Ondruch <v.ondruch@...>

22 messages 2011/11/11

[#40951] [Backport93 - Backport #5621][Open] Please backport thread-safe autoloading patch — Mike Perham <mperham@...>

25 messages 2011/11/12
[#40971] [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Mike Perham <mperham@...> 2011/11/12

[#40972] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Yehuda Katz <wycats@...> 2011/11/12

Unfortunately ruby-head has a deadlock in one of my go-to scenarios for

[#40976] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Hiroshi Nakamura <nahi@...> 2011/11/13

-----BEGIN PGP SIGNED MESSAGE-----

[#41128] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Charles Oliver Nutter <headius@...> 2011/11/18

On Sat, Nov 12, 2011 at 7:24 PM, Hiroshi Nakamura <[email protected]> wrote:

[#41129] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Hiroshi Nakamura <nahi@...> 2011/11/18

-----BEGIN PGP SIGNED MESSAGE-----

[#41142] Re: [Backport93 - Backport #5621] Please backport thread-safe autoloading patch — Charles Oliver Nutter <headius@...> 2011/11/18

On Fri, Nov 18, 2011 at 12:15 AM, Hiroshi Nakamura <[email protected]> wro=

[#40982] [ruby-trunk - Bug #5625][Open] Remove profanity and pejoratives — Andrew Grimm <andrew.j.grimm@...>

30 messages 2011/11/13

[#41004] [ruby-trunk - Feature #5628][Open] Module#basename — Thomas Sawyer <transfire@...>

18 messages 2011/11/14

[#41024] [ruby-trunk - Feature #5632][Open] Attempt to open included class shades it instead. — Boris Stitnicky <boris@...>

12 messages 2011/11/14

[#41025] Proposal to add new methods: positive? negative? natural? — JosFrancisco Calvo Moreno <josefranciscocalvo@...>

Hi all!

11 messages 2011/11/14
[#41027] Re: Proposal to add new methods: positive? negative? natural? — Jeremy Evans <code@...> 2011/11/14

On 11/15 12:58, Jos? Francisco Calvo Moreno wrote:

[#41031] Re: Proposal to add new methods: positive? negative? natural? — JosFrancisco Calvo Moreno <josefranciscocalvo@...> 2011/11/14

Hi Jeremy,

[#41038] [ruby-trunk - Bug #5634][Open] yield and binding — Thomas Sawyer <transfire@...>

17 messages 2011/11/14

[#41086] [ruby-trunk - Feature #5644][Open] add Enumerable#exclude? antonym — Suraj Kurapati <sunaku@...>

14 messages 2011/11/17

[#41175] [ruby-trunk - Feature #5654][Open] Introduce global lock to avoid concurrent require — Hiroshi Nakamura <nakahiro@...>

12 messages 2011/11/21

[#41200] [ruby-trunk - Bug #5659][Open] bug releasing a gem created with rails 3.1 — Vinicius Gati <viniciusgati@...>

14 messages 2011/11/22

[#41212] [ruby-trunk - Feature #5662][Open] inject-accumulate, or Haskell's mapAccum* — Edvard Majakari <edvard.majakari@...>

12 messages 2011/11/22

[#41213] [ruby-trunk - Bug #5663][Open] Combined map/select method — Yehuda Katz <wycats@...>

62 messages 2011/11/22

[#41317] [ruby-trunk - Bug #5676][Open] miniruby linking error: undefined reference to ___stack_chk_guard — Martin Dürst <duerst@...>

10 messages 2011/11/27

[#41404] [ruby-trunk - Bug #5690][Open] Module#qualified_const_get — Yehuda Katz <wycats@...>

31 messages 2011/11/30

[ruby-core:40624] [ruby-trunk - Feature #5531] deep_value for dealing with nested hashes

From: Alexey Muranov <muranov@...>
Date: 2011-11-01 12:45:17 UTC
List: ruby-core #40624
Issue #5531 has been updated by Alexey Muranov.


I can think of the following questions/objections to the suggested method definition:
1. is `{ 1 => 2}.dv(1,1) # => nil` the desired result?
2. this method examines the (super)class name of an object, rather than the behavior of an object, so does not allow to mix nested hashes and arrays,
3. this method calls itself recursively, while a loop would suffice.

The following is not a serious suggestion, but seriously, how about:

class Object
  def deep_value(*keys)
    obj = self
    obj = obj[keys.shift] while !keys.empty? && obj.respond_to?(:[])
    return obj
  end
end

(For this to work well it will be important to call it #deep_value and not to redefine #[].)
----------------------------------------
Feature #5531: deep_value for dealing with nested hashes
http://redmine.ruby-lang.org/issues/5531

Author: Kyle Peyton
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


This feature request stems from dealing with nested hashes, like the params from a request often dealt with in web frameworks.

Conditional code often needs to be written with multiple logical ANDs in order to achieve what this simple function can:

class Hash
  def deep_value(*ks)
    if ks.size == 1
      return self[ks.shift]
    else
      val = ks.shift
      return (self[val].is_a?(Hash) ? self[val].deep_value(*ks) : nil)
    end
  end
  
  alias dv deep_value
end


deep_value (dv) will simply recurse over a hash given a set of indexes and return the value at the end.

Example:

> foo = {:bar => {:baz => 'blah'}}
> foo.dv(:bar, :baz)
-> 'blah'
> foo.dv(:cats)
-> nil



-- 
http://redmine.ruby-lang.org

In This Thread