Category: Kent Crispin

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For those of you who somehow didn’t find 2048 distracting enough, here’s an infinite version where you build up…

Originally shared by Yonatan Zunger

For those of you who somehow didn’t find 2048 distracting enough, here’s an infinite version where you build up notes along the circle of fifths. It plays the notes as you match them, which is strangely soothing and hypnotic, even when it’s somewhat discordant. The infinity is handled by simply trying to get as many cycles around the circle as you can.

A warning: new tiles are only generated from within the five notes prior to the highest note you have on the board. This means that when you open up a new note, any notes you have from the “oldest” note you still have on the board can easily be stranded: no new tiles will show up which match them. This definitely adds some challenge.

h/t Brooks Moses.

http://calebhugo.com/musical-games-interact-with-sound/2048-circle-of-fifths

 

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find, xargs

Originally shared by Xah Lee

: the most powerful shell command. Master it. find, xargs. Here’s some commen patterns:

#  show just files ending with .html

find . -name “*.html”

# larger than 9 Mega bytes

find . -size +900000c

# delete all files whose name ends with ~.

find . -name “*~” -exec rm {} \;

# delete all empty files

find . -type f -empty -exec rm {} \;

# delete empty dirs

find . -depth -empty -type d -exec rmdir {} \;

# file status changed in last 60 min

find . -cmin -60

# file content modified in last 60 min

find . -mmin -60

for more, using xargs examples, see

http://xahlee.info/linux/linux_shell_find_example.html

 

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Laniakea: Our Home Supercluster of Galaxies

Originally shared by Astronomy Picture of the Day (APoD)

Laniakea: Our Home Supercluster of Galaxies

Image Credit: R. Brent Tully (U. Hawaii) et al., SDvision, DP, CEA/Saclay

http://apod.nasa.gov/apod/ap140910.html

It is not only one of the largest structures known — it is our home. The just-identified Laniakea Supercluster of galaxies contains thousands of galaxies that includes our Milky Way Galaxy, the Local Group of galaxies, and the entire nearby Virgo Cluster of Galaxies. The colossal supercluster is shown in the above computer-generated visualization, where green areas are rich with white-dot galaxies and white lines indicate motion towards the supercluster center. An outline of Laniakea is given in orange, while the blue dot shows our location. Outside the orange line, galaxies flow into other galatic concentrations. The Laniakea Supercluster spans about 500 million light years and contains about 100,000 times the mass of our Milky Way Galaxy. The discoverers of Laniakea gave it a name that means “immense heaven” in Hawaiian.