Prateeksha Singh pratu16x7

Floating note

Setting up flask app in heroku with a database

The below article will cover the intricacies of setting up databases and heroku in respect to a flask app. This is more like a memo and will have out of sequence instructions or solutions to errors so read thoroughly.

Setting up a database

You'll need the packages

C++ Pointer Tutorial

Because pointers can be ugh

"Regular" variables (not pointers)

To understand a pointer, let's review "regular" variables first. If you're familiar with a programming language without pointers like JavaScript, this is what you think when you hear "variable".

When declaring a variable by identifier (or name), the variable is synonymous with its value.

	from numpy import log, dot, e
	from numpy.random import rand

	class LogisticRegression:

	def sigmoid(self, z): return 1 / (1 + e**(-z))

	def cost_function(self, X, y, weights):
	z = dot(X, weights)
	predict_1 = y * log(self.sigmoid(z))

	<!DOCTYPE html>
	<html>
	<head>
	<script>
	var data
	var formId = 'form'
	var content
	var checked

	function drawForm() {

	<!DOCTYPE html>
	<html>
	<head>
	<script>
	var data
	var formId = 'form'

	function drawForm() {
	if (!data) return
	var outputEl = document.getElementById(formId);

	<meta name="description" content="{{ if .IsHome }}{{ .Site.Params.description }}{{ else }}{{ .Description }}{{ end }}"/>
	<meta name="robots" content="noodp"/>
	<link rel="canonical" href="{{ .Permalink }}" />

	<!-- Twitter Card -->
	<meta name="twitter:card" content="summary" />
	<meta name="twitter:description" content="{{ if .IsHome }}{{ .Site.Params.description }}{{ else }}{{ .Description }}{{ end }}" />
	<meta name="twitter:title" content="{{ .Title }}{{ if .IsHome }} - {{ .Site.Params.Tagline }}{{ else }} - {{ .Site.Title }}{{ end }}" />
	<meta name="twitter:site" content="{{ .Site.Params.twitter }}" />
	<meta name="twitter:creator" content="{{ .Site.Params.twitter }}" />

	#!/bin/sh

	# ngrok's web interface is HTML, but configuration is bootstrapped as a JSON
	# string. We can hack out the forwarded hostname by extracting the next
	# `*.ngrok.io` string from the JSON
	#
	# Brittle as all get out--YMMV. If you're still reading, usage is:
	#
	# $ ./ngrok_hostname.sh <proto> <addr>
	#

	#include <curl/curl.h>
	#include <string>

	size_t writeFunction(void ptr, size_t size, size_t nmemb, std::string data) {
	data->append((char) ptr, size nmemb);
	return size * nmemb;
	}

	int main(int argc, char** argv) {
	auto curl = curl_easy_init();

	#include <iostream>
	#include <string>
	#include <curl/curl.h>


	static size_t WriteCallback(void contents, size_t size, size_t nmemb, void userp)
	{
	((std::string)userp)->append((char)contents, size * nmemb);
	return size * nmemb;
	}