** UnhandledExceptionEventHandler :: OFFICIAL LC / CHATTER THREAD ** - Page 429 - Computer Technical Help

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10-23-2013 , 02:00 PM

#10701

clowntable

Carpal \'Tunnel

Join Date: Jun 2006 Posts: 45,557

Just for developing and testing stuff

http://www.vagrantbox.es/

-> find Ubuntu, install, done

Quote

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10-23-2013 , 02:10 PM

#10702

MrWooster

veteran

Join Date: Mar 2007 Posts: 2,984

Vagrant and chef make a very powerful combo.

Quote

10-23-2013 , 06:27 PM

#10703

MrWooster

veteran

Join Date: Mar 2007 Posts: 2,984

For anyone looking to learn JavaScript, super neat idea http://codecombat.com/

Quote

10-24-2013 , 01:07 AM

#10704

n00b590

adept

Join Date: Jun 2010 Posts: 980

http://vim-adventures.com/

Quote

10-24-2013 , 09:08 AM

#10705

Nchabazam

Pooh-Bah

Join Date: Mar 2008 Posts: 4,938

vim adventures was super helpful to get me used to a lot of the vim commands. Really cool.

Quote

10-24-2013 , 10:32 AM

#10706

Nchabazam

Pooh-Bah

Join Date: Mar 2008 Posts: 4,938

Also, does anyone else use vintage mode (vim commands) with sublime? It really is the best of both worlds... modern editor, vim commands.

Soo nice.

edit: just looking at the comment above re: tools

Quote

10-24-2013 , 11:00 AM

#10707

jjshabado

Carpal Tunnel

Join Date: Jul 2006 Posts: 22,732

Does it work well? I've tried other tools 'vim support' and I find it usually blows. Even if it it supports like 95% of vim commands the missing 5% can be really annoying.

Quote

10-24-2013 , 11:17 AM

#10708

Nchabazam

Pooh-Bah

Join Date: Mar 2008 Posts: 4,938

Quote:

Originally Posted by jjshabado

Does it work well? I've tried other tools 'vim support' and I find it usually blows. Even if it it supports like 95% of vim commands the missing 5% can be really annoying.

I'm pretty new to vim, but it does what I want.

A quick google reveals that whatever shortcomings it might have are easily solved via installing or writing python plugins (and that article was from 18 months ago). Sublime has amazing community support imo.

I can also use the mouse when in movement mode, which is nice from time to time.

In general, sublime is awesome.

Quote

10-24-2013 , 11:19 AM

#10709

MrWooster

veteran

Join Date: Mar 2007 Posts: 2,984

My vimrc in case anyone is interested in a starting point https://github.com/guyht/vimrc

Whatever you do, use pathogen to install plugins. It makes your life 100 times easier.

Quote

10-24-2013 , 11:29 AM

#10710

daveT

S.A.G.E. Master

Join Date: Jun 2005 Posts: 23,955

Quote:

Originally Posted by MrWooster

For anyone looking to learn JavaScript, super neat idea http://codecombat.com/

Tried it a bit last night. Too much copy / paste mode for my tastes.

Although admittedly, the concept, graphics and music, for web-based, is very good.

Quote

10-24-2013 , 11:53 AM

#10711

MrWooster

veteran

Join Date: Mar 2007 Posts: 2,984

They just got into Ycombinator so I would expect to see a lot of improvement over the next year.

Quote

10-24-2013 , 12:10 PM

#10712

jjshabado

Carpal Tunnel

Join Date: Jul 2006 Posts: 22,732

http://energycommerce.house.gov/hear...0%99t-disclose

Hilarious for anyone with any knowledge of technology.

Quote

10-24-2013 , 01:00 PM

#10713

clowntable

Carpal \'Tunnel

Join Date: Jun 2006 Posts: 45,557

Quote:

Originally Posted by MrWooster

For anyone looking to learn JavaScript, super neat idea http://codecombat.com/

That seems cool. Something I bookemarked recently in case I want to pick up Scala:
http://scalatron.github.io/

Quote

10-24-2013 , 01:15 PM

#10714

gaming_mouse

Carpal \'Tunnel

Join Date: Oct 2004 Posts: 13,786

i'd like to see one for bash/unix

Quote

10-25-2013 , 06:53 AM

#10715

derada4

old hand

Join Date: Feb 2011 Posts: 1,544

C# isn't that bad at all. I just finished up making a little 5 card draw poker game as my first project to learn the language.

Really glad I did this as I totally didn't realize how rusty my OOP skills were.

Quote

10-25-2013 , 02:39 PM

#10716

candybar

Pooh-Bah

Join Date: Aug 2011 Posts: 4,375

Quote:

Originally Posted by derada4

Yeah, C# with LINQ/Generics/Async feels pretty nice, much better than Java and close enough to Scala for a lot of things.

Quote

10-25-2013 , 10:05 PM

#10717

daveT

S.A.G.E. Master

Join Date: Jun 2005 Posts: 23,955

Amateur hour!

So, I never really seen binary, hex, or any of that stuff until the other day, and the question calls for converting integer to binary and binary to integer. This code feels wrong on so many levels:

Code:

def intToBinary(x):
    ans = ''
    while x > 0:
        ans += str(x % 2)
        x //= 2
    return int(ans[::-1])

def binaryToInt(x):
    sx = str(x)[::-1]
    power = 0
    ans = 0
    for i in sx:
        ans += int(i) * 2**power
        power += 1
    return ans

To confirm this somewhat works (yes, it fails for zero):

Code:

print(intToBinary(9))
print(intToBinary(1))
print(intToBinary(10))
print(intToBinary(100))
print(intToBinary(15))
print(intToBinary(89))

print(binaryToInt(intToBinary(9)))
print(binaryToInt(intToBinary(1)))
print(binaryToInt(intToBinary(10)))
print(binaryToInt(intToBinary(100)))
print(binaryToInt(intToBinary(15)))
print(binaryToInt(intToBinary(89)))

>>> 1001
1
1010
1100100
1111
1011001
9
1
10
100
15
89

Is that really the best that can be done without actually pushing bits?

Quote

10-25-2013 , 11:27 PM

#10718

DirtySprite

adept

Join Date: Jun 2012 Posts: 755

Hey guys can anyone help me with the following assignment (java)?

Given a class Point2D which creates a point at (x,y) coordinates
I'm to implement a class Line2D whos constructor takes in two Point2D variables a,b and creates a line x so that x is the line that goes through points a and b.

public Line2D(Point2D a, Point2D b) {
...
}

I can't get my head around how this should be done, any help would be appreciated

Quote

10-25-2013 , 11:35 PM

#10719

Allen C

journeyman

Join Date: Oct 2004 Posts: 379

I'll give this a go as a hello to the programming forum.
imo

Code:

def int2b(x):
    #cant see how to do much better but
    #why call int on the return value?
    #1010 doesnt have much to do with 0b1010
    return str(intToBinary(x))

def b2i(x):
    ans = 0
    for i in x:
        ans = ans * 2 + int(i)
    return ans

Or if you want to look cool and 'push bits' you can:
ans * 2 --> ans << 1,
x % 2 --> x & 1
x /= 2 --> x >>= 1

Last edited by Allen C; 10-25-2013 at 11:42 PM. Reason: silly

Quote

10-25-2013 , 11:52 PM

#10720

daveT

S.A.G.E. Master

Join Date: Jun 2005 Posts: 23,955

Quote:

Originally Posted by Allen C

I'll give this a go as a hello to the programming forum.
imo

Code:

def int2b(x):
    #cant see how to do much better but
    #why call int on the return value?
    #1010 doesnt have much to do with 0b1010
    return str(intToBinary(x))

def b2i(x):
    ans = 0
    for i in x:
        ans = ans * 2 + int(i)
    return ans

Or if you want to look cool and 'push bits' you can:
ans * 2 --> ans << 1,
x % 2 --> x & 1
x /= 2 --> x >>= 1

Why coerce to int? It's a good question and I guess a semantic issue. I know that 0b1010 isn't an int, but it feels more filthy to call it a string. Not exactly trying to push bits in Python, the question was "Write a program that converts int to binary in a high level language of your choice" with the specification that you can't use the built-in stuff.

If it matters -- after reading the question again -- they did call for the intToBinary to return as a string and the binaryToInt to take a string. It wouldn't change the code outside a few characters. It is the coercion that bothers me.

edit to add: welcome to the forum.

edit to add more: Wait? How are you able convert without using base ^ power?

Quote

10-26-2013 , 02:04 AM

#10721

Allen C

journeyman

Join Date: Oct 2004 Posts: 379

Well Python's bin() returns a string. I thing the main point of intToBinary is just to print out something for the user to see what the answer is. Your integer is already represented in binary internally of course.
And conversely in Python you can do a string in binary to int.
>>> int("111", 2)
7
So everything seems to be on the up and up.