kyle
/
sandbox
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

PE: Starting ch4 exercises.

This commit is contained in:
Kyle Isom 2019-04-22 16:51:22 -07:00
parent 6220e18137
commit e05f92d764
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
pe/chapter4.erl
View File

@ -1,5 +1,5 @@
-module(chapter4). -module(chapter4).
-export([t2l/1, timeit/1]). -export([t2l/1, timeit/1, date_string/0]).
% 2. The BIF tuple_to_list(T) converts the elements of the tuple T to % 2. The BIF tuple_to_list(T) converts the elements of the tuple T to
% a list. Write a function called my_tuple_to_list(T) that does the % a list. Write a function called my_tuple_to_list(T) that does the
% same thing only not using the BIF that does this. % same thing only not using the BIF that does this.
@ -25,6 +25,12 @@ timeit(F) ->
F(), F(),
{erlang:system_time(microsecond) - Started, microsecond}. {erlang:system_time(microsecond) - Started, microsecond}.
date_string() ->
{Hour, Minute, Second} = erlang:time(),
{Year, Month, Day} = erlang:date(),
io:format("~w-~2..0w-~2..0w ~2..0w:~2..0w:~2..0w",
[Year, Month, Day, Hour, Minute, Second]).
% 4. Advanced: Look up the manual pages for the Python datetime % 4. Advanced: Look up the manual pages for the Python datetime
% module. Find out how many of methods in the Python datetime class % module. Find out how many of methods in the Python datetime class
% can be implemented using the time-related BIFs in the erlang % can be implemented using the time-related BIFs in the erlang