I have a hash where the keys are the months and I want to convert the objects to positive numbers AND currency.
INPUT
hash = {
12 => -5888.969999999999,
4 => -6346.1,
3 => -6081.76,
2 => -5774.799999999999,
1 => -4454.38
}
OUTPUT
hash = {
12 => 5888.96,
4 => 6346.10,
3 => 6081.76,
2 => 5774.79,
1 => 4454.38
}
#Output should be a float
Any help would be greatly appreciated.
Try
hash.transform_values{|v| v.round(2).abs()}
or
hash.update(hash){|k,v| v.round(2).abs()}
Numeric.abs() can be applied to ensure a number is positive and Float.round(2) will round a float to 2 decimal places. See ruby-doc.org/core-2.1.4/Numeric.html#method-i-abs and ruby-doc.org/core-2.2.2/Float.html#method-i-round for usage examples. Note that round() will not add trailing zeros since that does not affect numerical value, however trailing zeros can be added by formatting, for example:
hash = {
12 => -5888.969999999999,
4 => -6346.1,
3 => -6081.76,
2 => -5774.799999999999,
1 => -4454.38
}
# transform hash values
hash.each do |key, value|
hash[key] = value.abs().round(2)
end
# print the modified hash without formatting the values
hash.each do |key, value|
puts "#{key} => #{value}"
end
# prints
# 12 => 5888.97
# 4 => 6346.1
# 3 => 6081.76
# 2 => 5774.80
# 1 => 4454.38
# print hash with values formatted with precision of 2 digits
hash.each do |key, value|
puts "#{key} => #{'%.2f' % value}"
end
# prints
# 12 => 5888.97
# 4 => 6346.10
# 3 => 6081.76
# 2 => 5774.80
# 1 => 4454.38
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