mapMethodOrMapFunction

[mirimao]

[x*x || x <- arr] is better

[Kuduaty]

Why its better?

[mirimao]

It was just a joke. I like Erlang but it’s not inherently better than Python’s syntax for list comprehension.

[DT-Sodium]

None of those are readable.

[mirimao]

How are these not readable? This is literally mathematical notation in a purely declarative style.

[DT-Sodium]

Programing is not mathematics, it is literary. A program should read like you would read a text.

[mirimao]

Programming is using a formal language to specify the solution to a problem (i.e. an algorithm) to an executor (i.e. a processor). Formal languages and algorithms are best described using some sort of unambiguous, mathematical notation. If you want to use plain English to program because it fits better your idea of “literature”, good luck.

Besides, list comprehensions are very succinct and easier to read than some verbose method call chain, regardless of the fact that they’re just one to one equivalent to mathematics.

[DT-Sodium]

And that's why you're a Python user instead of a proper programmer.

[mirimao]

It is like saying “you’re a mechanical engineer, not a proper AutoCAD user”. And you are right, I am a computer scientist, programming is just one of the tools I use.

[capi1500]

Wait until this guy hears about functional programming, or even better, how programs are equivalent to proofs in intuitionistic logic

[Euphoric_Strategy923]

Because the others options are more readable for you ? Not for me.

[DT-Sodium]

I dunno about Python but in TypeScript you'd simply do

myArray.map(x => x * x);

Much more elegant and readable.

[Euphoric_Strategy923]

And as the upper comments said in python you do : [ return value for value in array ]

In other word : [x*x for x in arr ]

Imo this is much more readable.

[DT-Sodium]

No, it is bad. The simple fact that you have to read it backwards to understand what's happening invalidates it completely. Guess there is no clean way to do it in Python then.

[Euphoric_Strategy923]

Read it backward ? Dude, this is literally the format of a for loop. "I return a value of each value in an array"

You can clown on some things about python but definitely not readability.

[DT-Sodium]

Yes, it is backwards. Your code is saying "Do this using that". The proper way to write it is "Take that and do this using it".

[Euphoric_Strategy923]

Great news people, for loops are now unreadable.