Emplace vs push c++

push() adds a copy of an already constructed object into the queue as a 
parameter, it takes an object of the queue's element type.

emplace() constructs a new object in-place at the end of the queue. It takes 
as parameters the parameters that the queue's element types constructor takes.

If your usage pattern is one where you create a new object and add it to the
container, you shortcut a few steps (creation of a temporary object and copying
it) by using emplace().

Source: stackoverflow.com

Similar codes

0 vote171 views1 answer
All permutations with repetition C++
C++
30 votes205 views5 answers
Remove value from vector c++
C++
18 votes164 views4 answers
Length of array in cpp
C++
0 vote215 views1 answer
Cpp fread
C++
0 vote182 views1 answer
To toggle (flip the status of) the k-th item of the set
C++
-1 vote241 views5 answers
Memset in c++
C++
0 vote165 views1 answer
How to find min of two numbers in c++
C++
1 vote150 views1 answer
C++ shortcuts in desktopp app
C++
0 vote179 views1 answer
How to remove maximum number of characters in c++ cin,ignore
C++
2 votes170 views1 answer
Dlopen failed: library "libomp.so" not found
C++