cpputils
utils for cpp(c++11)
simple log
example
logf("DEBUG", "debug %s,%d", str,num);
log("DEBUG")<<"debug "<<str<<","<<num<<std::endl;
timer
Timer t;
int64_t e = t.Elapsed();
cout<< t.ElapsedStr();
random generator
random_generator rg;
size_t rand = rg.next<size_t>(1,5);