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Parsing Comma-Separated Data | ||
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Code | Expected | Actual |
require 'csv' primary_colors = "red,green,blue\nred,yellow,blue" CSV::Reader.parse(primary_colors) { |row| row.each { |cell| puts cell }} |
red green blue red yellow blue |
red green blue red yellow blue |
require 'rubygems' require 'faster_csv' shakespeare = %{Sweet are the uses of adversity,As You Like It "We few, we happy few",Henry V "Seems, madam! nay it is; I know not ""seems.""",Hamlet} FasterCSV.parse(shakespeare) { |row| puts "'#{row[0]}' -- #{row[1]}"} |
'Sweet are the uses of adversity' -- As You Like It 'We few, we happy few' -- Henry V 'Seems, madam! nay it is; I know not "seems."' -- Hamlet |
'Sweet are the uses of adversity' -- As You Like It 'We few, we happy few' -- Henry V 'Seems, madam! nay it is; I know not "seems."' -- Hamlet |
%{"Seems, madam! nay it is; I know not ""seems.""",Hamlet} def parse_delimited_naive(input, fieldsep=',', rowsep="\n") input.split(rowsep).inject([]) do |arr, line| arr << line.split(fieldsep) end end def join_delimited_naive(structure, fieldsep=',', rowsep="\n") rows = structure.inject([]) do |arr, parsed_line| arr << parsed_line.join(fieldsep) end rows.join(rowsep) end parse_delimited_naive("1,2,3,4\n5,6,7,8") |
[["1", "2", "3", "4"], ["5", "6", "7", "8"]] | [["1", "2", "3", "4"], ["5", "6", "7", "8"]] |
join_delimited_naive(parse_delimited_naive("1,2,3,4\n5,6,7,8")) |
"1,2,3,4\n5,6,7,8" | "1,2,3,4\n5,6,7,8" |
parse_delimited_naive('1;2;3;4|5;6;7;8', ';', '|') |
[["1", "2", "3", "4"], ["5", "6", "7", "8"]] | [["1", "2", "3", "4"], ["5", "6", "7", "8"]] |
parse_delimited_naive('1,"2,3",4') |
[["1", "\"2", "3\"", "4"]] | [["1", "\"2", "3\"", "4"]] |
data = [[1,2,3],['A','B','C'],['do','re','mi']] writer = FasterCSV.open('first3.csv', 'w') data.each { |x| writer << x } writer.close puts open('first3.csv').read() |
1,2,3 A,B,C do,re,mi |
1,2,3 A,B,C do,re,mi |
data = [] FasterCSV.foreach('first3.csv') { |row| data << row } data |
[["1", "2", "3"], ["A", "B", "C"], ["do", "re", "mi"]] | [["1", "2", "3"], ["A", "B", "C"], ["do", "re", "mi"]] |