jm + numbers   5

Want To Make Money? Build A Business On A Bike Lane
“Local stores next to the protected bike lane have seen a 49% increase in sales, compared to an average of 3% for Manhattan as a whole.”
numbers  statistics  cycling  bike-lanes  shops 
13 days ago by jm
Elias gamma coding
'used most commonly when coding integers whose upper-bound cannot be determined beforehand.'
data-structures  algorithms  elias-gamma-coding  encoding  coding  numbers  integers 
april 2016 by jm
Branchless hex-to-decimal conversion hack
via @simonebordet, on the mechanical-sympathy list: ((c & 0x1F) + ((c >> 6) * 0x19) – 0x10)
hacks  one-liners  coding  performance  optimization  hex  conversion  numbers  ascii 
january 2014 by jm
ie. "i18n", "a11y" etc.
According to Tex Texin, the first numeronym [..] was "S12n", the electronic mail account name given to Digital Equipment Corporation (DEC) employee Jan Scherpenhuizen by a system administrator because his surname was too long to be an account name. By 1985, colleagues who found Jan's name unpronounceable often referred to him verbally as "S12n". The use of such numeronyms became part of DEC corporate culture.[1]
numbers  names  etymology  numeronyms  history  dec  i18n  a11y  l10n  s12n 
december 2013 by jm
Kaprekar's constant
'6174 .. is notable for the following property: Take any four-digit number, using at least two different digits. (Leading zeros are allowed.); Arrange the digits in ascending and then in descending order to get two four-digit numbers, adding leading zeros if necessary; Subtract the smaller number from the bigger number; Go back to step 2. The process will reach 6174 in at most 7 iterations'
6174  constants  cool  maths  mathematics  numbers  kaprekar  wow  from delicious
august 2010 by jm

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