danii1

# tag target commits as demo-start, demo-end
# move to the start of your presentration with `git checkout demo-start`
# use to `git next`, `git prev` to jump between "slides"

git config --global alias.next '!git checkout `git rev-list HEAD..demo-end | tail -1`'
git config --global alias.prev 'checkout HEAD^'

treyhunner

"""
Test performance of these counting methods:

- count_if_else: Set to 1 if not yet seen and increment otherwise
- count_if: Set to 0 if not yet seen, then increment regardless of containment
- count_exception: Attempt to increment and set to 1 if KeyError caught
- count_setdefault: Set default value to 0, then increment
- count_fromkeys: Create dict with necessary keys set to 0, then increment each
- count_set_and_comprehension: Create dict of items and counts using a set
- count_defaultdict: Increment count, automatically setting unseen values to 0

e12e

stevenswafford

"          _                      _          "
"   _     /||       .   .        ||\     _   "
"  ( }    \||D    '   '     '   C||/    { %  "
" | /\__,=_[_]   '  .   . '       [_]_=,__/\ |"
" |_\_  |----|                    |----|  _/_|"
" |  |/ |    |                    |    | \|  |"
" |  /_ |    |                    |    | _\  |"

	It is all fun and games until someone gets hacked!

carlwgeorge

How I switched from mdadm to btrfs

After reading [this Ars Technica article][1], I decided that I wanted to start using btrfs on my home fileserver. It had been running for a few years with an mdadm raid-10 array, formatted with ext4, holding about 3.4 TB of data. I figured I would take advantage of some of the special capabilities of btrfs to perform the conversion in place. After some research, I formed my basic plan.

• backup data to external drives
• remove two of the drives from the mdadm raid-10
• configure those two drive with a btrfs raid-0 filesystem
• copy the data from the degraded mdadm raid-10 to the new btrfs raid-0
• completely deactivate the mdadm raid-10

pbkhrv

function readWholeStdin() {
    process.stdin.resume();
    process.stdin.setEncoding('utf8');
    var buffer = '';
    process.stdin.on('data', function(chunk) {
        buffer += chunk;
    });

    var deferred = Q.defer();
    process.stdin.on('end', function() {

fabiosantoscode

# This enables a publicly available server to forward connections to your computer behind a NAT.
# So if you access http://xx.xx.xx.xx:8080/ on your browser, traffic is redirected to your machine behind a NAT.

# on your local host, type:
ssh -R xx.xx.xx.xx:8888:localhost:80 [email protected]

# now wait for your shell, and type:
socat TCP-LISTEN:8080,FORK TCP:127.0.0.1:8888

# This command outputs nothing, just keep it running. While you don't ^C, your tunnel is up and running!

bryanluman

import numpy as np
import rasterio

"""
2014-02-13
Bryan Luman
Use it however you like at your own risk

Problem:
I have a huge DEM converted from LiDAR LAS points. I'd like to make it slightly

jfrost

\o /tmp/duplicate-indexes.txt

-- check for exact matches
SELECT indrelid::regclass
     , array_agg(indexrelid::regclass)
  FROM pg_index
 GROUP BY indrelid
     , indkey
HAVING COUNT(*) > 1;

leplatrem

CREATE OR REPLACE FUNCTION SimplifyEdgeGeom(atopo varchar, anedge int, maxtolerance float8)
RETURNS float8 AS $$
DECLARE
  tol float8;
  sql varchar;
BEGIN
  tol := maxtolerance;
  LOOP
    sql := 'SELECT topology.ST_ChangeEdgeGeom(' || quote_literal(atopo) || ', ' || anedge
      || ', ST_Simplify(geom, ' || tol || ')) FROM '