stephensmitchell

Comparison of Julia, Python and Octave

Overview

Julia is a new languange for technical computing. It is a mix of R, Matlab, Python and other similar languages. Its main advantage is its speed: it is just in time (JIT) compiled and almost as fast as C. Another advantage is its type inference, i.e. you do not have to specify types (although you can), but all variables are statically typed. It is a high level language that is fast as well. Here I compare the behavior to similar

stephensmitchell

<script context="module">
  import gql from 'graphql-tag';
  import { client } from './apollo';

  const ARTICLES = gql`
    {
      article {
        id
        title
        author {

stephensmitchell

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace MainColorConsole
{
    class Program
    {
        static void Main(string[] args)
        {

stephensmitchell

using SkiaSharp;
using SkiaSharp.Views.Forms;
using System;
using System.Runtime.CompilerServices;
using Xamarin.Forms;

namespace Legatro.Cross.Controls
{
    class ProjectSymbol : SKCanvasView
    {

stephensmitchell

# http://webapps.stackexchange.com/questions/39587/view-estimated-size-of-github-repository-before-cloning
# tested on macOS
echo https://github.com/torvalds/linux.git | perl -ne 'print $1 if m!([^/]+/[^/]+?)(?:\.git)?$!' | xargs -I{} curl -s -k https://api.github.com/repos/'{}' | grep size

# output: 
# "size": 1746294,

stephensmitchell

Preserving State in Server-Side Blazor applications

Server-side Blazor is a stateful application framework. Most of the time, your users will maintain an ongoing connection to the server, and their state will be held in the server's memory in what's known as a "circuit". Examples of state held for a user's circuit include:

• The UI being rendered (i.e., the hierarchy of component instances and their most recent render output)
• The values of any fields and properties in component instances
• Data held in DI service instances that are scoped to the circuit

Occasionally, users may experience a temporary network connection loss, after which Blazor will attempt to reconnect them to their original circuit so they can continue.

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body {
  font-family: Helvetica, arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  padding-top: 10px;
  padding-bottom: 10px;
  background-color: white;
  padding: 30px; }

body > *:first-child {

stephensmitchell

Authentication and Authorization

Authentication means determining who a particular user is. Authorization means applying rules about what they can do. Blazor contains features for handling both aspects of this.

It worth remembering how the overall goals differ between server-side Blazor and client-side Blazor:

• Server-side Blazor applications run on the server. As such, correctly-implemented authorization checks are both how you determine which UI options to show (e.g., which menu entries are available to a certain user) and where you actually enforce access rules.
• Client-side Blazor applications run on the client. As such, authorization is only used as a way of determining what UI options to show (e.g., which menu entries). The actual enforcement of authorization rules must be implemented on whatever backend server your application operates on, since any client-side checks can be modified or bypassed.

Authentication-enabled templates for Server-Side Blazor

stephensmitchell

using namespace System.Net
using namespace System.Threading.Tasks
using namespace System.Management.Automation
using namespace System.Collections.Generic

function Test-DNSName ([String[]]$hostnames, [int]$Timeout = 3000) {
<#
.SYNOPSIS
Given a list of DNS names, returns the ones that actually resolve to an actual name
#>

stephensmitchell

#!/usr/bin/python

import sqlite3
import os
import sys
from applescript import asrun
from subprocess import Popen, PIPE
import shutil
import requests
import json