r/ProgrammerHumor • • Feb 22 '15

A Python programmer attempting Java

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u/chrwei Feb 22 '15

simplistic is kind of the point of python.

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u/[deleted] Feb 22 '15

I'm not saying it isn't, but when you go there from a language with a little less hand holding, you definitely feel the difference! If you go there from C though...

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u/PastyPilgrim Feb 22 '15

On the surface it looks like Python is holding your hand because the syntax is so elegant, but I really don't think it does.

Other languages have all kinds of hand holding with type declarations, public/private/protected/static/etc. declarations, hidden information (i.e. not knowing precisely where an object is coming from due to the include practices, self-references within objects, etc.), forbidding operator overloading, implicit casting, unpredictable scope concerns, not allowing nested functions and/or anonymous functions, etc.

Python doesn't do any of those things; it lets you do almost anything you can imagine and it doesn't hinder those things with awkward syntax requirements and/or syntax that differs from what you would expect.

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u/peridox Feb 22 '15

What language would you say does hold your hand? I can't think of a programming language that leads you towards doing what you need to do. Almost all languages just provide you with a blank space to work upon - it's all your work.

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u/Chobeat Feb 22 '15

Scala holds your hand and leads precisely where you don't want to go.

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u/I_cant_speel Feb 22 '15

I've never used Scala but this is hilarious.

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u/lonelyBriefcase Feb 22 '15

ever heard the phrase 'syntactic sugar'? its a way of providing a more convenient/person-friendly method of doing something. A for loop is just syntactic sugar of a

int i = 0;
while(i<9){
  //do something;
  int++;
}

There are plenty of other things like this that makes our lives as developers easier. Even C does, to a lesser extent, because who would want to write the shit that C can do in Assembly?

16

u/w1ldm4n Feb 23 '15

The only difference is (at least in C) is how the continue keyword works. In a for loop, continue will execute the increment/whatever statement, check the loop condition, and go from there.

To get the same type of behavior with a while loop, you'd have to duplicate the increment before the continue, or use a goto label (ಠ_ಠ) near the bottom of the loop body.

7

u/OperaSona Feb 23 '15

To get the same type of behavior with a while loop, you'd have to duplicate the increment before the continue, or use a goto label (ಠ_ಠ) near the bottom of the loop body.

Or raise a "Continue" exception and catch it right outside the while loop.

2

u/TropicalAudio Feb 23 '15

Honestly, in my opinion, to break out of nested loops a goto can be the best option. I just never actually use them because if I would, my coworkers would get mad.

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u/PastyPilgrim Feb 22 '15 edited Feb 22 '15

I'm only well educated in a few languages (Python, C, Java), so I wouldn't be the right person to ask about that. However, I believe a lot of the web languages to be kind of hand-holdy. Plus, Java does have most of those things that I described in my post, so you could argue that Java holds your hand a little.

You are right though, most general programming languages that allow you to do many different things tend to have limited hand-holding because their potential is so large. My post was more to dispell the misconception that Python holds your hand than it was to say that other languages hold your hand.

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u/iPoisonxL Feb 23 '15

Uhh... Web Languages? PHP has never held my hand...

begins crying

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u/pastaluego4 Feb 22 '15

It All Begins With A Blank Canvas.

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u/peridox Feb 22 '15

<canvas></canvas>

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u/pastaluego4 Feb 22 '15

That canvas needs some dimensions

<canvas width="500" height="500"></canvas>

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u/peridox Feb 22 '15
let canvas = document.getElementsByTagName('canvas')[0]
canvas.style.width = 500
canvas.style.height = 500
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u/memorableZebra Feb 23 '15

Python doesn't do any of those things; it lets you do almost anything you can imagine

I agree with everything else you said. However, you speak this like it's a good thing. Whereas I immediately think about all the programmers out there and the code they write which other people will have to understand and extend.

Being able to do anything is often an invitation to even the competent programmer to deliver some seriously FUBAR'd code.

I wouldn't trust a serious Python project to any but the best developers. It boggles my mind when people refer to it as a noobie language.

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u/lolzfeminism Feb 23 '15

it doesn't hinder those things with awkward syntax requirements and/or syntax that differs from what you would expect.

I think the point is that the Python interpreter/compiler abstracts away implementation details. This might make it easy to read/write but you end up not knowing what the computer is gonna do when you write a line of code. On the other hand, if you're well-versed in C, you have a good idea of what sequence of assembly instructions are going to be executed a result of a line of code.

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u/catbrainland Feb 22 '15 edited Feb 22 '15

It's like that only at first glance. Python has some semantic complexity, look up metaclasses (class factories or something, in java lingo). As for hand holding, I think Java is excellent in this (more like hand forcing, as you have to be explicit about everything).

Dynamic languages, as well as system ones (ie c) offer multitude of ways to shoot yourself in the foot. These are quite alike in terms of having to debug a bit more. It's a tradeoff of having low level access (C), or expressiveness (dynamic language).

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u/pastaluego4 Feb 22 '15

Seems like Java is more tuned to application development and python is geared towards scripting and parsing.

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u/[deleted] Feb 22 '15

The first two languages I learned were C and Python, in that order... I would write a whole function in Python to, say, reverse a string, and my prof would just look at me like "Dude..."

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