I want to step through a simple hash, showing the value for each key-value pair, and give the user the ability to update that value. Crucially, if the user just hits enter and doesn't provide a new value, the old value should survive. Here is my sample code, which works but does not seem particularly Ruby-idiomatic:
mydata = {"key1" => "value1", "key2" => "value2", "key3" => "value3"}
newdata = {}
mydata.each do |k, v|
puts "current value is " + v.to_s
input = gets.chomp
if input.length == 0
newdata[k] = mydata[k]
else
newdata[k] = input
end
end
puts mydata
puts newdata
If you really don't care about the keys:
newdata = mydata.transform_values do |value|
puts "Current: #{value.inspect}"
updated = gets.chomp
updated.empty? ? value : updated
end
That's all there is to it.
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