56 lines
1.1 KiB
Text
56 lines
1.1 KiB
Text
= Dependencies
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== Bdb
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Your need first this library:
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http://github.com/DenisKnauf/bdb
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= Download
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via git:
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git clone git://github.com/DenisKnauf/sbdb.git
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= Installation
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gem build sbdb.gemspec
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gem install sbdb-*.gem
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= Usage
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First, open environment and database
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require 'sbdb'
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Dir.mkdir 'newenv' rescue Errno::EEXIST
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env = SBDB::Env.new 'newenv', SBDB::CREATE
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db = env.open SBDB::Btree, 'newdb.db', 'mynewdb', SBDB::CREATE
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It works nearly like a Ruby-Hash:
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db['key'] = 'value'
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db['key'] # => 'value'
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db.to_hash # => {'key'=>'value'}
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db.map {|k, v| [k, v].join ' => '} # => ["key => value"]
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db.count # => 1
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SBDB::DB#each uses a SBDB::Cursor:
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cursor = db.cursor
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cursor.each {|k,v| puts "#{k}: ${v}" }
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<strong>Don't forget to close everything, you've opened!</strong>
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cursor.close
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db.close
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env.close
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But you can use a <em>lambda</em> to ensure to close everything:
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SBDB::Env.new( 'newenv', SBDB::CREATE) do |env|
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env.open SBDB::Btree, 'newdb.db', 'mynewdb', SBDB::CREATE do |db|
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db.to_hash
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end
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end
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SBDB::DB#to_hash creates a cursor and close it later.
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