I am trying to go through this Wolfram Blog example: http://blog.wolfram.com/2009/02/12/flag-analysis-with-mathematica/ on country flag analysis.
I am having a problem understanding the following piece of code:
countryColors = (# -> Catch[Intersection[ StringSplit[ If[Head[#] === Missing, Throw[""], #]& @ CountryData[#, "FlagDescription"]], colorNames]]) & /@ CountryData;
colorNames is just a list of colors.
I do not understand
&@ in the above piece of code. What I know is that
& is used to define a pure function, and
@ is used as a Prefix.
If, for example, the
If yields true, then it returns a country name. What does it mean to have
&@ after that?