From: Robert Klemme <shortcutter@...>
Date: 2012-12-10T02:38:59+09:00
Subject: Re: Searching a hash by value

On Sun, Dec 9, 2012 at 2:21 PM, Ferdous ara <lists@ruby-forum.com> wrote:
> may be i need to design my logic in a different way
> let me explain
>
> basically in that hash table (out put of JSON)
>
> as key => value
>
>
>
> i got like this
> [
> {
> "notes_expanded" : "check_maintanance_mode",
>       "host_comments" : [],
>       "host_icon_image_expanded" : "",
>       "checks_enabled" : 1,
>       "max_check_attempts" : 3,
>        "host" : service2.home.lan,
>
> }
> {
> "notes_expanded" : "check_memory ",
>       "host_comments" : [],
>       "host_icon_image_expanded" : "",
>       "checks_enabled" : 1,
>       "max_check_attempts" : 3,
>        "host" : service.home.lan,
>
> }
> {
> "notes_expanded" : "check_maintanance_mode",
>       "host_comments" : [],
>       "host_icon_image_expanded" : "",
>       "checks_enabled" : 1,
>       "max_check_attempts" : 3,
>       "host" : service.home.lan,
>
> }
> ]
>
> So Basically i want to get all the host which
> notes_expanded  = check_maintanance_mode
> so i  should get only 2
>
> Does it make sense ??

Yes, but it's something completely different than selecting from a
Hash based on values.  You rather want something like

items = stuff.select {|h| h["notes_expanded"] == "check_maintanance_mode"}

Kind regards

robert

--
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