Question

I have a map of time stamps and some data map<string,double> mymap; how can i sort this by the time stamp so that everything is in chrnological order?
heres a sample data set of whats inside,
what i have.

 < timestamp           ,         data>

"2011-02-04 14:14:51"             1
"2010-09-24 07:45:13"             2
"2011-10-28 11:10:32"             3
"2008-10-27 11:10:32"             4
"2008-10-27 11:10:33"             5

desired result

"2008-10-27 11:10:32"             4
"2008-10-27 11:10:33"             5
"2010-09-24 07:45:13"             2
"2011-02-04 14:14:51"             1
"2011-10-28 11:10:32"             3

Answer 1

std::map should always be sorted:

Internally, the elements in the map are sorted from lower to higher key value following a specific strict weak ordering criterion set on construction.

The only thing I can think of is that it’s not comparing the strings correctly. Using an integer or a format designed to store dates may help.