functionmerge(x,y,fc,fm)// x:  an array// y:  another array// fc: compare function (a, b)// fm: map function (v, i, x)

constxsortedArray=require('extra-sorted-array');varx=[10,20,20,40,40,80];vary=[20,50,70];xsortedArray.merge(x,y);// → [ 10, 20, 20, 20, 40, 40, 50, 70, 80 ]

References