Will It Shuffle?

The shuffle Javascript algorithm may be rewritten with functional programming, minimum overhead just as.

shuffle= (a)=>{var b=Math.floor,c=Math.random,d=a.length;while(--d>=0)((c)=>{var b=a[d];a[d]=a[c],a[c]=b})(b(c()*(d+1)));return a}

Note that this version returns the array it operates on instead of just void