没有命名空间这样的东西

myfunc(){
    echo "I will never be executed."
}
another_func(){
    # this "redeclare" overwrites original function
    myfunc(){ echo "I am the one and only"; }
}
# myfunc will print "I will never be executed"
myfunc
# but if we call another_func first
another_func
# it gets overwritten and
myfunc
# no prints "I am the one and only"

最新的声明获胜。命名空间没有这样的东西！ 但是，函数可以包含其他函数。