Simplify creating multidimensional array

[daddybboston]

You can get rid of 2nd map if you use square brackets instead of curved brackets in the first map.

data = column1.zip(column2).zip(column3).zip(column4).map(lambda a_b_c_d : [a_b_c_d[0][0][0],a_b_c_d[0][0][1],a_b_c_d[0][1],a_b_c_d[1]] )

[romeokienzler]

Thanks a lot @daddybboston - any chance you submit a pull request to this repository?

[daddybboston]

Romeo @romeokienzler ,

It took me a bit to get my head around the context what I had done over a year ago. Now that I've done the mental recall, I remember it was a great class and you had it extremely well organized. Thank you for all your work.

I grep'd the code for 'data = column' and found a couple lines, There is a line in coursera_ds/a0_m3_exercice2_spark2.3_python3.5_cos.ipynb. I'm assuming this is the line I was commenting about (reformatted to fit).

data = column1.zip(column2).zip(column3).zip(column4).map(
    lambda a_b_c_d : (a_b_c_d[0][0][0],a_b_c_d[0][0][1],a_b_c_d[0][1],a_b_c_d[1]) 
    ).map(lambda a_b_c_d : [a_b_c_d[0],a_b_c_d[1],a_b_c_d[2],a_b_c_d[3]])

I'm hesitant to submit a PR without without being able to test and verify the code change. My Coursera subscription has elapsed and I took the course on an prior computer so I can't even look at my old code to see what I had done. It would take me a while but I might be able to setup an environment inorder to get you a tested PR. I'm willing to make the extra effort since I found you did such a great job on your course. I'm just not sure if this minor improvement is worth the effort.

FYI, you can look me up in BluePages and slack me, Jeff Boston.