T Minus and Counting 2016

[LondonTom]

[grumpyhack]

Half time - can't stand the stress

 

[Chazwozza]

Couldn't resist another baffling one:

 

Sorry it's so big.  I only hope someone knows what it all means.

[stuartbert two hats]

Same as yesterday really. 11111111 is binary for 255. With 8 binary digits, you can express 255 different values, with the highest of those values being 255/(in decimal) and the lowest being 0.

As a computer person, I have instantly recognise all the numbers in this sequence:

1,2,4,8,16,32,64,128,256,512,1024 etc..

I imagine that most people will recognise a few of these numbers as the size of SD cards, or the amount of RAM you get in a phone. In binary, they are:

1,11,111,1111,11111,111111,1111111,11111111.....

You may notice that each number in the sequence is double the previous value.

Has this helped anyone or made things more confusing? Hopefully the former

Edited October 10, 2015 by stuartbert two hats

[Chazwozza]

The bit (no pun intended...) I didn't understand was what looked like a sum: 0 minus 1 equals 255

That is pretty strange, even for programmers!

[whisty]

Lifes way too short for all that binary stuff. I can't even understand normal numbers.

 

Anyway a dedication to Yoghurt and his Glastonbury comeback. It's a 255/85R16

 

 

And a topical one for me.

 

[stuartbert two hats]

The bit (no pun intended...) I didn't understand was what looked like a sum: 0 minus 1 equals 255

That is pretty strange, even for programmers!

You'd think it was strange for programmers, but it's not!

@- is the Swift operator for "subtraction with overflow". Now the type in question is an 8-bit integer, which can hold 256 values. This means that it cannot represent any values other than 0-255. So, if you attempt to subtract 1 from 0(the minimum value), it will 'overflow' to the maximum value (255).

You may think this is odd behaviour and you'd be right, but it can help with arithmetic efficiency in some circumstances and has been a behaviour in programming languages since before Glastonbury Festival began.

EDIT: have I made it worse?

Edited October 10, 2015 by stuartbert two hats

[guypjfreak]

[oneeye]

This made me chuckle

[Chazwozza]

You'd think it was strange for programmers, but it's not!

@- is the Swift operator for "subtraction with overflow". Now the type in question is an 8-bit integer, which can hold 256 values. This means that it cannot represent any values other than 0-255. So, if you attempt to subtract from 0(the minimum value), it will 'overflow' to the maximum value (255).

You may think this is odd behaviour and you'd be right, but it can help with arithmetic efficiency in some circumstances and has been a behaviour in programming languages since before Glastonbury Festival began.

EDIT: have I made it worse?

No, all quite clear now thanks; languages are a thing I can do, so is maths. Never got into programming language though #MissedOpportunity

[Astracat]

[oneeye]

[grumpyhack]

[Yoghurt on a Stick]

[Quark]

[Pear_Cider]

[whisty]

[Astracat]

[Yoghurt on a Stick]

[LondonTom]

[oneeye]

[Rincewind78]

hi there!

tried to follow the thread and got a bit lost !

But just wanted say hello!! 

I joined the thread in preparation for Glastonbury 2014 but stopped posting for no real important reasons.

Anyway - really enjoyed that year and was gutted I couldn't get tickets for 2015

 

But I have for 2016!! and looking forward to the count down for it and to saying "hello" to folk here

Edited October 12, 2015 by Rincewind78

[whisty]

hi there!

tried to follow the thread and got a bit lost !

But just wanted say hello!! 

I joined the thread in preparation for Glastonbury 2014 but stopped posting for no real important reasons.

Anyway - really enjoyed that year and was gutted I couldn't get tickets for 2015

 

But I have for 2016!! and looking forward to the count down for it and to saying "hello" to folk here

 

Good news then, excitement building with every day that passes  

 

 

Edited October 12, 2015 by whisty

[Yoghurt on a Stick]

hi there!

tried to follow the thread and got a bit lost !

But just wanted say hello!! 

I joined the thread in preparation for Glastonbury 2014 but stopped posting for no real important reasons.

Anyway - really enjoyed that year and was gutted I couldn't get tickets for 2015

 

But I have for 2016!! and looking forward to the count down for it and to saying "hello" to folk here

 

Hello and welcome Rincewind78.

[carlosj]