class Parqueteur::ColumnCollection
Attributes
column_names[R]
Public Class Methods
new()
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# File lib/parqueteur/column_collection.rb, line 9 def initialize @columns = [] @column_names = [] @columns_idx = {} end
Public Instance Methods
add(column)
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# File lib/parqueteur/column_collection.rb, line 23 def add(column) unless @columns_idx.key?(column.name) @columns_idx[column.name] = column @columns << column @column_names << column.name end true end
arrow_schema()
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# File lib/parqueteur/column_collection.rb, line 37 def arrow_schema @arrow_schema ||= Arrow::Schema.new(@columns.collect(&:to_arrow_field)) end
each(&block)
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# File lib/parqueteur/column_collection.rb, line 19 def each(&block) @columns.each(&block) end
find(name)
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# File lib/parqueteur/column_collection.rb, line 33 def find(name) @columns_idx.fetch(name, nil) end
key?(key)
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# File lib/parqueteur/column_collection.rb, line 15 def key?(key) @columns_idx.key?(key) end