Elixir Date.diff/2 is undefined or private -


i new elixir , trying run scripts elixir documentation, testing date structure gave strange result because date.compare(~d[2016-04-16], ~d[2016-04-28]) returning :lt while when trying run date.diff(~d[2016-04-16], ~d[2016-04-28]) getting error

(undefinedfunctionerror) function date.diff/2 undefined or private (elixir) date.diff(~d[2016-04-16], ~d[2016-04-28])

date.diff/2 added in elixir 1.5 (as can see here). pretty sure using previous version. running elixir -v can check version have installed.


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