demark -- insert a string between elements of a list of strings

demark -- insert a string between elements of a list of strings

demark(s,x) -- given a list of strings x and a string s provides the string obtained by concatenating the elements of x with a copy of x inserted between each successive pair.

i1 : demark("+",{"a","b","c"})



o1 = a+b+c

Code:

     -- ../../../Macaulay2/m2/fold.m2:23
     demark = (s,v) -> concatenate between(s,v)