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@deanmlittle
deanmlittle / reverse_endianness.forth
Created March 17, 2020 04:16
Reverse the endianness of a SHA256 hash in Bitcoin script
OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_1 OP_SPLIT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT OP_SWAP OP_CAT
@eglaysher
eglaysher / mandelbrot.hoon
Last active February 23, 2020 20:26
Fixed-point (not floating point!) Mandelbrot generator in Hoon.
:: Mandelbrot implementation inspired by the fixed-point version for
:: uBasic/4tH, and the floating point version for PureBasic from
:: https://rosettacode.org/wiki/Mandelbrot_set. This is pure fixed-point.
::
:: The trick is to use 10.000 as "floating" 1.0, and then do all math in terms
:: of that.
::
|%
++ left-edge -21.000
++ right-edge --15.000
@mattnewport
mattnewport / planetppm.hoon
Created August 29, 2019 03:54
Procedural Planet raytracer in Hoon
|= dim=@ud ^- (list @t)
=/ dx (div:rs .1 (sun:rs dim))
=/ white [.1 .1 .1]
=< (genppm dim)
|%
++ min
|= [x=@rs y=@rs] ^- @rs
?: (lth:rs x y) x y
++ max
|= [x=@rs y=@rs] ^- @rs
@catermelon
catermelon / config.py
Created October 4, 2013 15:49
Flask-SQLAlchemy - separating reads and writes
# This is not used unless SQLALCHEMY_BINDS is not present
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://{username}:{password}@{hostname}/{database}?charset=utf8'
SQLALCHEMY_BINDS = {
'master': 'mysql+pymysql://{username}:{password}@{hostname}/{database}?charset=utf8',
'slave': 'mysql+pymysql://{username}:{password}@{hostname}/{database}?charset=utf8'
}