BUILT-IN MATHEMATICA SYMBOL

SortBy

sorts the elements of list in the order defined by applying f to each of them.

If some of the are the same, then the canonical order of the corresponding is used.

Sort a list of lists by the last element of each sublist:

Sort by the total of each sublist:

Sort a list of integers by their values modulo 3:

Sort a list of lists by the last element of each sublist:

Out[1]=

Sort by the total of each sublist:

Out[2]=

Sort a list of integers by their values modulo 3:

Out[1]=

Sort by numerical value:

The default order ranks these symbolically:

Sort by absolute numerical value:

Slightly faster way:

Sort by Re, Im, Arg, and Abs:

Sort by date:

SortBy can be used on expressions with any head:

Show the top 10 countries according to different criteria:

Sort the first 10 countries in alphabetical order by population:

Sort the first 10 countries in alphabetical order by area:

Sort mathematically equivalent expressions by different criteria:

Sort by size of error for numerical evaluation with machine numbers at

:

is equivalent to Sort[{f[#], #}&/@e][[All, -1]]: