How can it be the proper PC for a programmer?

Question

what specifications should a computer have for a programmer - processor, RAM memory, hard disk, etc

Answer 1

there is no "should have". the best you can afford is what you should have.

personally:
#1
i7 4790k
16GB RAM
GTX 1080
M.2 drive for OS
SSD for programs
HDD for storage

#2
i7 4770k
16GB RAM
GTX 970 SLI
SSD for OS
HDD for storage

#3
Weak laptop I got in a pawn deal

#4
Rasberry Pi

They all work fine for programming except the laptop. Windows 8 SUCKS. Build the best computer you can afford and try to design it with upgradability in mind