MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

jbenet

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

jiaaro

#!/usr/bin/env bash
set -eo pipefail

NODE_VERSION=$(curl --silent --get https://semver.io/node/stable)
NODE_BASENAME=node-v${NODE_VERSION}-linux-x64
NODE_ARCHIVE="http://nodejs.org/dist/v${NODE_VERSION}/${NODE_BASENAME}.tar.gz"

# make a temp directory
tempdir="$( mktemp -t node_XXXX )"
rm -rf $tempdir

aaronvanston

  $("#parsleyForm").parsley({
    errorClass: 'has-danger',
    successClass: 'has-success',
    classHandler: function(ParsleyField) {
        return ParsleyField.$element.parents('.form-group');
    },
    errorsContainer: function(ParsleyField) {
        return ParsleyField.$element.parents('.form-group');
    },
    errorsWrapper: '<span class="text-help">',

bergie

• Install Arduino IDE to /opt/arduino
• Install PubSubClient and MsgFlo
• Edit /opt/arduino/libraries/PubSubClient/src/PubSubClient.h and set a bigger buffer size (for example 512)
• Add ESP8266 board URL:

/opt/arduino/arduino --pref "boardsmanager.additional.urls=http://arduino.esp8266.com/stable/package_esp8266com_index.json" --save-prefs

• Install board package

forkfork

XADD streamname [MAXLEN items] * field value [field value ...]

Adds a set of fields with values to the specified stream. If MAXLEN items are exceeded, items are removed from the beginning of the stream to bring the length down to MAXLEN. The "*" field is to autogenerate an item ID, but can be overriden.

Return value

Simple string reply: epoch time (in milliseconds) followed by a .N (for differentiating multiple events on the same millisecond)