How do I overwrite a column of characters in R with 1s and 0s?

I need to convert one of the columns of my data to binary values. I am trying to insert 0 if there is a blank space and 1 if there is a string of characters.

My data currently looks like this:

Name     Code
Bob      
Joe     f59tuc
Anna    
Kylie
Jill    hyt618
Ben     skt310

And I am trying to convert it to this:

name     code
Bob       0
Joe       1
Anna      0
Kylie     0
Jill      1
Ben       1

I tried this if statement, but get errors. I am new to R, and have very little experience with if-statements, while-loops, for-loops, etc -- so there may be some obvious mistakes in the code that I am not thinking of. Any help would be most appreciated.

if (df$code[df$code == ""]) {
    df$code[df$code] <- 0
} 
else {
    df$code[df$code] <- 1
}