WHAT is CODING?!

 

is it setting your PVR?

connecting up the stereo?

writing HTML, CSS, JavaScript?

 

... what ISN'T coding???

(image from http://www.bioprepper.com/2014/07/06/survival-communications-the-utility-of-morse-code/ )

 

 

What is it to you?

 

 

Problem Solving!

  • incremental, agile and iterative!
  • unconditional love!  :) 
  • ... and a bunch of crazy rules and fundamentals!

syntax (rules) and structure (fundamentals)!

 

var express = require('express');
var bodyParser = require('body-parser');

var app = express();
app.use(bodyParser.urlencoded({extended:true}));

var quotes = [
  { author : 'Audrey Hepburn', text : "Nothing is impossible, the word itself says 'I'm possible'!"},
  { author : 'Walt Disney', text : "You may not realize it when it happens, but a kick in the teeth may be the best thing in the world for you"},
  { author : 'Unknown', text : "Even the greatest was once a beginner. Don't be afraid to take that first step."},
  { author : 'Neale Donald Walsch', text : "You are afraid to die, and you're afraid to live. What a way to exist."}
];

app.get('/', function(req, res) {
  res.json(quotes);
});

app.get('/quote/random', function(req, res) {
  var id = Math.floor(Math.random() * quotes.length);
  var q = quotes[id];
  res.json(q);
});

app.get('/quote/:id', function(req, res) {
  if(quotes.length <= req.params.id || req.params.id < 0) {
    res.statusCode = 404;
    return res.send('Error 404: No quote found');
  }
  var q = quotes[req.params.id];
  res.json(q);
});

app.post('/quote', function(req, res) {
  if (!req.body.author ||!req.body.text) {
    res.statusCode = 400;
    return res.send('Error 400: Post syntax incorrect.');
  }
  var newQuote = {
    author : req.body.author,
    text : req.body.text
  };
  quotes.push(newQuote);
  res.json(true);
});

app.listen(process.env.PORT || 3000);
<!DOCTYPE html>

<html lang="en">
  <body>
  
   <form action="http://node-js-133758.nitrousapp.com:3000/quote" method="post">
     <input name="author" value="me">
     <input name="text" value="hi">
     <button>Send my quote</button>
   </form>

  </body>
</html>

The "command line" interface for Mongo let's us manipulate the database!!!!

 

NOTE that ISODate and numbers are of certain types!

 

_id is reserved... ObjectId is unique!  

REPL (Read Evaluate Print Loop!)

(AP Photo/Francois Mori)

Let's PLAY!!!!!

console.log("heeeeeellllooooo!!!");


var x = 3;
console.log(x);

Let's PLAY!!!!!


console.log("hello".toUpperCase()); 

console.log("3" + 4);

console.log(123 == "123");

console.log(123 === "123");

Let's PLAY!!!!!


var pet = "kittens";

if (pet == "puppies") {
  pet += "!";
} else if (pet == "kittens") {
  pet += "!!";
} else {
  pet = "?" + pet;
}
console.log(pet);

Let's PLAY!!!!!


var obj = {
  name: "Carrot",
  details: {
    color: "orange",
    servingsize: 12
  }
}
obj.details.servingsize;

Let's PLAY!!!!!


var obj = {
  name: "Carrot",
  details: {
    color: "orange",
    servingsize: 12
  }
}
obj.details.servingsize;

obj.details.servingsize = 42;
obj.details.servingsize;

Let's PLAY!!!!!


var a = new Array();
a[0] = "dog";
a[1] = "cat";
a[2] = "hen";

for (var i = 0; i < a.length; i++) {
    console.log(a[i]);
}

Let's PLAY!!!!!


var a = new Array();
a[0] = "dog";
a[1] = "cat";
a[2] = "hen";

for (var i = 0; i < a.length; i++) {
    console.log(a[i]);
}
    
a.push("cow");

for (var i = 0; i < a.length; i++) {
    console.log(a[i]);
}

Let's PLAY!!!!!


function add(x, y) {
  var total = x + y;
  return total;
}

add(2,3);

Let's PLAY!!!!!

function add(x, y) {
  var total = x + y;
  return total;
}

add(2,3);

console.log(total);
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