User interface contains NumericInput control, which accepts only digits.

Extend NumericInput structure so that:

  • It implements UserInput interface.
  • Add(rune) should add only decimal digits to the input. Other runes should be ignored.
  • GetValue() should return the current input.

For example, the following code should output "10":

var input UserInput = &NumericInput{}

  •   Example case: Wrong answer
  •   GetValue() returns input: Wrong answer
  •   Add(rune) adds runes to the input: Wrong answer
  •   Add(rune) adds only decimal digits to the input: Wrong answer

Go Interfaces Public


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