Array so: for every value 1st column correspond one in 2nd
2 25
25 27
27 60
4 50
27 61
be able to write this
2 25,27,60,61
4 50
this steps:
-2nd isn't in right then rewrite in 1st column with its value (25)
-the 25 is also in 2nd column, then its value 27 go near 25
.....
some particular code?