1 day temp to fill in for employee who called out sick.

Temp receptionists work at Dental Office for 1 day.
Maybe there is a training program for temps.
Receptionists make $18 hour.
Temp receptionists make $23 hour but dont work every day.

Does this exist in the IT field?
Does this exist in the software field?
Software Developer Taking a day off from work and looking at new code that the temp wrote but the temp worked 8 hours and didnt have enough time to write comments and we had to revert all the temps work.