Nick Reese nickreese

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

Update package.json, set version to a prerelease version, e.g. 2.0.0-rc1, 3.1.5-rc4, ...
Run npm pack to create package
Run npm publish <package>.tgz --tag next to publish the package under the next tag
Run npm install --save package@next to install prerelease package

Spatial SQL and PostGIS

This set of instructions goes with this presentation deck.

Installing PostGIS

PGDG Yum Repository

https://yum.postgresql.org/

yum install postgis24_10

	function getData() {
	var deferred = $.Deferred();

	$.ajax({
	'url': 'http://google.com',
	'success': function(data) {
	deferred.resolve('yay');
	},
	'error': function(error) {
	deferred.reject('boo');

	#!/usr/bin/bash

	# Download zeromq
	# Ref http://zeromq.org/intro:get-the-software
	wget https://github.com/zeromq/libzmq/releases/download/v4.2.2/zeromq-4.2.2.tar.gz

	# Unpack tarball package
	tar xvzf zeromq-4.2.2.tar.gz

	# Install dependency

	CREATE EXTENSION IF NOT EXISTS "unaccent"

	CREATE OR REPLACE FUNCTION slugify("value" TEXT)
	RETURNS TEXT AS $$
	-- removes accents (diacritic signs) from a given string --
	WITH "unaccented" AS (
	SELECT unaccent("value") AS "value"
	),
	-- lowercases the string
	"lowercase" AS (

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

	import React, { ComponentProps } from 'react'
	import { ScrollView } from 'react-native'
	import { useDraggableScroll } from './use-draggable-scroll'

	export const DraggableScrollView = React.forwardRef<
	ScrollView,
	ComponentProps<typeof ScrollView>
	>(function DraggableScrollView(props, ref) {
	const { refs } = useDraggableScroll<ScrollView>({
	outerRef: ref,

	import { forwardRef } from 'react';
	import { LinkCore, LinkCoreProps } from 'solito/link';
	import { AnchorProps, styled, Anchor } from 'tamagui';

	const StyledTextLink = styled(Anchor, {
	name: 'TextLink',
	});

	export type TextLinkProps = Pick<LinkCoreProps, 'href' \| 'target'> &
	AnchorProps;

	import cv2
	import numpy as np
	from matplotlib import pyplot as plt

	left_image_address = '/home/deveshdatwani/Desktop/left.jpg'
	right_image_address = '/home/deveshdatwani/Desktop/right.jpg'

	left_image = cv2.imread(left_image_address, cv2.IMREAD_GRAYSCALE)
	right_image = cv2.imread(right_image_address, cv2.IMREAD_GRAYSCALE)