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@faulker
faulker / update_json.sql
Created October 27, 2016 18:40
Example of how to update a Postgresql JSON field using jsonb_set
update tests_summary_data set data = (jsonb_set(to_jsonb(data), '{misc,gap,pa}', '-1', false))::json where data->'misc'->'gap'->>'pa' = '0';
@bwbaugh
bwbaugh / ec2-ubuntu-16.04-swap.md
Last active September 27, 2019 06:27
EC2 swap file instructions. Gathered from several online articles / blogs / stackexchange.

Can check if you're using swap with sudo swapon --show and free -h.

EBS volume

Useful for t2.micro and other instances with no access to instance store. Use this if you prefer not to mess with the root volume.

  1. Create the EBS volume e.g., 1 GB.
@piraz
piraz / monitor_service.py
Last active April 6, 2022 02:58
Script that monitors a service running on systemd. If service is not running the script will try to start the service.
#!/bin/python
#
# Copyright 2016 Flavio Garcia
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
@katz
katz / RecalculateSellectedCells.gs
Last active April 15, 2021 14:58
Google Apps Script to re-calculate selected cells in Sheets
/**
* @OnlyCurrentDoc Limits the script to only accessing the current spreadsheet.
*/
/**
* Adds a custom menu with items to show the sidebar and dialog.
*
* @param {Object} e The event parameter for a simple onOpen trigger.
*/
@angstwad
angstwad / dict_merge.py
Last active March 1, 2024 23:53
Recursive dictionary merge in Python
# Copyright 2016-2022 Paul Durivage
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
@katowulf
katowulf / app.js
Last active February 24, 2022 06:51
Simple paginate example in AngularFire with Firebase.util (http://firebase.github.io/firebase-util/)
var app = angular.module('app', ['firebase']);
app.controller('ctrl', function($scope, $pageArray) {
$scope.pageItems = $pageArray(ref, 'number');
});
app.factory('$pageArray', function($firebaseArray) {
return function(ref, field) {
// create a Paginate reference
var pageRef = new Firebase.util.Paginate(ref, field, {maxCacheSize: 250});
@typehorror
typehorror / Flask-SQLAlchemy Caching.md
Last active February 15, 2024 14:44
Flask SQLAlchemy Caching

Flask-SQLAlchemy Caching

The following gist is an extract of the article Flask-SQLAlchemy Caching. It allows automated simple cache query and invalidation of cache relations through event among other features.

Usage

retrieve one object

# pulling one User object

user = User.query.get(1)

@letmaik
letmaik / models_committed.py
Created May 22, 2014 14:54
delete, insert, update events after a commit for SQLAlchemy
from sqlalchemy import create_engine, event, orm
from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm.session import Session as SessionBase, object_session
from sqlalchemy.event.api import listen
# The following adds delete, insert, and update events after successful commits.
# SQLAlchemy provides only events after flushes, but not after commits.
# The classes are adapted from Flask-SQLAlchemy.
# see also https://stackoverflow.com/a/12026787/60982
@kageurufu
kageurufu / models.py
Last active June 6, 2021 07:37
PostgreSQL JSON Data Type support for SQLAlchemy, with Nested MutableDicts for data change notifications To use, simply include somewhere in your project, and import JSON Also, monkey-patches pg.ARRAY to be Mutable @zzzeek wanna tell me whats terrible about this?
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Integer, Column
from postgresql_json import JSON
Base = declarative_base()
class Document(Base):
id = Column(Integer(), primary_key=True)
data = Column(JSON)
#do whatever other work
@eerohele
eerohele / swaparrayelements.js
Last active November 2, 2021 16:01
Swap two array elements (JavaScript)
/**
* Swap the elements in an array at indexes x and y.
*
* @param (a) The array.
* @param (x) The index of the first element to swap.
* @param (y) The index of the second element to swap.
* @return {Array} The input array with the elements swapped.
*/
var swapArrayElements = function (a, x, y) {
if (a.length === 1) return a;