[Ruby] Array_Shovel

names = ["Kim", "Jen", "Yuki"]

print names => ["Kim", "Jen", "Yuki"]
print "\n"

name << "Maki" # Shovel operation. I want add to something or add a new element to the end of the array use the symbol(<<).  

print names => ["Kim", "Jen", "Yuki", "Maki"]

names[1] = "Mike"
print names => ["Kim", "Mike", "Yuki", "Maki"] # replace 할 수 있다.