From: Quintus <quintus@...>
Date: 2013-05-12T22:24:45+09:00
Subject: Re: How do I remove a setting from a YAML file?

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Am Sun, 12 May 2013 20:39:37 +0900
schrieb "Rafal C." <lists@ruby-forum.com>:

Hi Rafal,

>    File.open(FILE, 'w+') do |f|
>      f << previous_settings.to_yaml
>    end

Why do you use "w+" as the file mode? You don=E2=80=99t read from the file =
in
the supplied block.

> My question is: how do I delete a setting in a YAML file?
> Say this is my YAML file:
>=20
>  ---
>  foundation: http://foundation.zurb.com/files/foundation-4.1.6.zip
>  normalize: http://necolas.github.io/normalize.css/2.1.1/normalize.css
>  h5bp: https://github.com/h5bp/html5-boilerplate/archive/master.zip
>
> And I want to remove the h5bp option?

Simply load the YAML file, delete the corresponding hash key, and write
the file back out to disk.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hsh =3D YAML.load_file("yourfile.yml")
hsh.delete("h5bp")
File.open("yourfile.yml", "w"){|f| YAML.dump(hsh, f)}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Vale,
Marvin

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