CrossEye

    > var isboxed = (function() {"use strict"; return function isboxed() {return this instanceof Number;}}());
    > isboxed.call(5);
    false

    var sum = ls => ls.reduce(add, 0)

    var currentTotal = reduce(add, 0, nbrs);

    var sum = reduce(add, 0); //=> :: [Number] -> Number

    // process1 :: (Item -> Bool) -> [Item] -> [OtherType]
    // process2 :: [Item] -> [OtherType]
    process1(isOk, items); //=> [otherType1, otherType2, ...]
    process2(items); //=> [otherType1, otherType2, ...]

    
    var processR1 = seq(filter, map(toOtherType), flatten);
    var processR2 = processR1(isOk);

    
    var processT1 = (isOk, items) => items.filter(isOk).map(toOtherType).flatten()
    var processT2 = items => processT1(isOk, items)

    items
      .filter(isOk)
      .map(toOtherType)
      .flatten()
      
      

    var process = seq(filter(isOk), map(toOtherType), flatten);
    

    process(items);
    

    map(process, groupsOfItems)