ruby - 将数组存储为哈希？

Question

我正在提取 CSV 数据，然后将其存储为数组。我需要将这些数组作为单个哈希返回。

这将允许我为每个索引使用一个键，而不是使用索引号，但我在让它工作时遇到了问题。它记录一个错误，指出参数数量错误。

有什么地方出错了吗？

代码:

ref       = Array.new
summary   = Array.new
pri       = Array.new
state     = Array.new
estdur    = Array.new
notes     = Array.new
supporter = Array.new
bz        = Array.new
project   = Array.new
team      = Array.new

hashed = Hash.new

csvPath = "#{File.dirname(__FILE__)}"+"/../modules/csv.csv"
CSV.foreach(csvPath, :headers=>true, :header_converters=>:symbol) do |row|
  ref       << row [ :feature   ]
  summary   << row [ :Summary   ]
  pri       << row [ :Pri       ]
  state     << row [ :State     ]
  estdur    << row [ :EstDur    ]
  notes     << row [ :Notes     ]
  supporter << row [ :Supporter ]
  bz        << row [ :BZ        ]
  project   << row [ :Project   ]
  team      << row [ :Team      ]
end
return hashed[
  "ref",       ref,
  "summary",   summary,
  "pri",       pri,
  "state",     state,
  "estDur",    estdur,
  "notes",     notes,
  "supporter", supporter,
  "bz",        bz,
  "project",   project,
  "team",      team
]

Answer 1

您处理此问题的方式相当困惑。每当您看到大量这样的变量时，就表明您应该使用不同的存储方法。在返回它们之前将它们折叠成散列是关于它们应该如何存储的提示。

这是一个更像 Ruby 风格的重做:

# Create a Hash where the default is an empty Array
result = Hash.new { |h, k| h[k] = [ ] }

# Create a mapping table that defaults to the downcase version of the key
mapping = Hash.new { |h, k| h[k] = k.to_s.downcase.to_sym }

# Over-ride certain keys that don't follow the default mapping
mapping[:feature] = :ref

csvPath = File.expand_path("/../modules/csv.csv", File.dirname(__FILE__))

CSV.foreach(csvPath, :headers => true, :header_converters => :symbol) do |row|
  row.each do |column, value|
    # Append values to the array under the re-mapped key
    result[mapping[column]] << value
  end
end

# Return the resulting hash
result