theothermattm

Node debugging with chrome

See this article first.

Use node --inspect

Most of the time it should give you a chrome URL. If not, go to about:inspect in chrome and you should see a target to inspect

Using mocha

theothermattm

How to set CA certs in node

(I always forget this!)

https://stackoverflow.com/questions/29283040/how-to-add-custom-certificate-authority-ca-to-nodejs

export NODE_EXTRA_CA_CERTS=[your CA certificate file path]

theothermattm

Some of the greatest info I've seen on creating a healthy engineering courtesy of Spotify:

Spotify Engineering Culture Part 1

TODO make notes on this one

Spotify Engineering Culture Part 2

• 0:50 - "We aim to make mistakes faster than anyone else" - Fail Fast and Improve Fast.
• 1:30 - "Fail Friendly Environment" - Encourage sharing of failures so everyone can learn from them. Some teams have "Fail walls" showing off their failures.

theothermattm

# original source based on: https://github.com/fabiohbarbosa/docker-healthcheck-oracle/blob/master/assets/healthcheck.sh

CHECK=$(${ORACLE_HOME}/bin/sqlplus -s ${HEALTHCHECK_USER}/${HEALTHCHECK_PASSWORD}@localhost/${HEALTHCHECK_SERVICE_NAME} as sysdba <<END
  --set pagesize 0 feedback off verify off heading off echo off;
  -- the simplest type of health check
  --select count(*) from dual;
  -- this will check if a 
  SELECT count(*) FROM V\$INSTANCE where INSTANCE_NAME = 'xe' and DATABASE_STATUS = 'ACTIVE';
  exit;
END

theothermattm

-- https://stackoverflow.com/questions/1690404/how-to-drop-all-user-tables

BEGIN
   FOR cur_rec IN (SELECT object_name, object_type
                     FROM user_objects
                    WHERE object_type IN
                             ('TABLE',
                              'VIEW',
                              'PACKAGE',
                              'PROCEDURE',

theothermattm

Tom Chi - Learning Through Prototyping

()[https://www.youtube.com/watch?v=kuqgrvUPc5g]

• Better to reason with experience/data than guesses
  • Find the quickest path to experience
  • Doing is the best kind of thinking.
• Smart people will always have good defenses of their guesses
• "Am I hearing a guess, or am I hearing direct experience?"
• We want experience

theothermattm

// this
if ( logger.isDebugEnabled() ) {
    logger.debug("Some code with a parameter: " + param1 + " - " + param2 + " - " + param3);
}
 
// becomes this
logger.debug("Some code with a parameter: {} - {} - {}", param1, param2, param3");

theothermattm

rsync -azP --delete --filter=":- .gitignore" . targethost:/targetdirectory

theothermattm

• On each remote server:

mkdir -p ~/.ssh; touch ~/.ssh/authorized_keys; chmod -R 700 ~/.ssh;

• On your local machine, make sure you have an ID generated (if not, see https://help.ubuntu.com/community/SSH/OpenSSH/Keys)
• Then on your machine:

cat .ssh/id_rsa.pub | ssh username@host "cat >> ~/.ssh/authorized_keys"

theothermattm

# from https://github.com/nodejs/node/issues/3742#issuecomment-225939382

openssl x509 -inform der -in /Path/to/the.crt -out /Path/to/the/file.pem