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Ruby CSV Converters What's Wrong
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require 'csv' | |
CSV::Converters[:num2] = lambda do |num| | |
puts "Converter called with #{num}" | |
return num unless num.is_a?(Numeric) | |
sprintf('%.2f', num) | |
end | |
CSV.instance($stdout, | |
{ headers: [:name, :val] , write_headers: true, | |
:converters => [:num2]}) do |csv| | |
csv << { name: "a", val: 1 } | |
csv << { name: "b", val: 0.0 } | |
csv << { name: "c", val: 6.666666666666 } | |
end |
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seph$ ruby --version | |
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-darwin15] | |
seph$ ruby /tmp/x.rb | |
Converter called with name | |
Converter called with val | |
name,val | |
a,1 | |
b,0.0 | |
c,6.666666666666 |
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require 'csv' | |
csv = CSV.instance($stdout, { | |
headers: [:name, :val], | |
write_headers: true, | |
}) | |
csv.convert do |num| | |
begin | |
puts "Converter called with #{num}" | |
sprintf('%.2f', num) | |
rescue | |
num | |
end | |
end | |
csv << { name: "a", val: 1 } | |
csv << { name: "b", val: 0.0 } | |
csv << { name: "c", val: 6.666666666666 } | |
puts csv.converters | |
puts csv.converters.first.call(6.666666666) |
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seph$ ruby --version | |
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-darwin15] | |
seph$ ruby /tmp/x.rb | |
Converter called with name | |
Converter called with val | |
name,val | |
a,1 | |
b,0.0 | |
c,6.666666666666 | |
#<Proc:0x007fb55a93b158@/tmp/x.rb:8> | |
Converter called with 6.666666666 | |
6.67 |
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