gweakliem

'''Problem: come up with an encoding for a tree of integers.

Tree representing
       1
      /|\ 
     2 3 4 
    /\   |\
   5  6  9 11
      /\  \
     7  8  10

gweakliem

'''Tree representing
       1
      /|\ 
     2 3 4 
    /\   |\
   5  6  9 11
      /\  \
     7  8  10
     
Not especially happy with this. Feels like I'm fighting the representation.

gweakliem

import scala.io
object Solution {
    # Handle input of the format <size>\n<num>\n<num>\n...^d
    def main(args: Array[String]) {
        val n = StdIn.readInt()
        val nums = new Array[Int](n)
        for (i <- 1 to n) {
            nums[i] = StdIn.readInt()
        }
    }

gweakliem

# find pigs - find what directories consume the most space. You can recursively run down this report to get to a specific dir
sudo du -cha --max-depth=1  $1 | grep -E "M|G"

# getflinkenv.sh - if you're running in yarn, this gets the address of the jobtracker and then from that, the address of the jobmanager.
# this moves every time the container restarts so it's handy to have around.
FLINK_SRV=`yarn application -list 2> /dev/null | grep "Flink 1.2.1" | awk '{print $NF}'`
FLINK_JOBMGR=`curl --silent $FLINK_SRV/jobmanager/config | jq -r '.[] | select(.key == "jobmanager.rpc.address"),select(.key == "jobmanager.rpc.port") | .value' | tr "\n" ":" | sed 's/:$//'`
echo $FLINK_SRV $FLINK_JOBMGR

# calc-offset.sh

gweakliem

All these assume OSX bash. Most should be portable to Linux.

brew install spark to get the nifty sparklines stuff

Price history of the last 12 hours of c5.18xlarge instances

aws ec2 describe-spot-price-history --instance-types c5.18xlarge --product-descriptions "Linux/UNIX"  --start-time $(date -v-12H -u +"%Y-%m-%dT%H:%M:%S.000Z") --query "SpotPriceHistory[].SpotPrice" --output text

gweakliem

class Scratch {
    private static boolean done;
    private static int count;

    public static void main(String[] args) throws InterruptedException {
        done = false;
        new Thread(() -> {
            System.out.println("Running");
            count = 0;

gweakliem

Don't Walk Away From Complexity, Run

August 12, 2019

"If only management gave me the opportunity" Only constant is change. Point of Agile the ability to adapt to change.

"I've set the wedding date. I've not asked her out yet." -- how software projects are managed @venkat_s https://twitter.com/venkat_s/status/617052918491918336

gweakliem

OKTA_DOMAIN= # e.g. example.okta.com
curl -d '{ "username":"$USERNAME","password":"$PASSWORD" }' -c cookie_jar.txt \
    -H "Content-Type: application/json" -b cookie_jar.txt -c cookie_jar.txt \
     https://$OKTA_DOMAIN/api/v1/authn > auth.json

{
  "stateToken": "00oBpbTzKnRdKLYvc8yNBdFTusuoS4KUhdANgrMsOt",
  "expiresAt": "2019-07-08T22:54:32.000Z",
  "status": "MFA_REQUIRED",
  "_embedded": {

gweakliem

Kotlin for Java Programmers

• Multiparadigm language
• Statically Typed
• Compiles to java & javascript

"I'll teach you java, let's learn hello world". First word is public. What's public? then static. What's static?.

There's a lot of stuff "you don't need to know right now". Kotlin doesn't make its problems your problems.

gweakliem

1. FEATURE EXPECTATIONS [5 min]
   1. Use cases
   2. Scenarios that will not be covered
   3. Who will use
   4. How many will use
   5. Usage patterns
2. ESTIMATIONS [5 min]
   1. Throughput (QPS for read and write queries)
   2. Latency expected from the system (for read and write queries)
   3. Read/Write ratio