Functions as data/

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Mon Jul 18 2022 19:56:44 GMT+0000 (Coordinated Universal Time)

const checkThatTwoPlusTwoEqualsFourAMillionTimes = () => {
  for(let i = 1; i <= 1000000; i++) {
    if ( (2 + 2) != 4) {
      console.log('Something has gone very wrong :( ');
    }
  }
};

// assigning a function to a variable 


isTwoPlusTwo = checkThatTwoPlusTwoEqualsFourAMillionTimes;

isTwoPlusTwo();
console.log(isTwoPlusTwo.name);


/// function as Parameters

const addTwo = num => {
  return num + 2;
}

const checkConsistentOutput = (func, val) => {
let checkA = val + 2;
  let checkB = func(val);
  if (checkA === checkB){
    return checkB;
  }else{
    console.log('inconsistent results');
  }
}

console.log(checkConsistentOutput(addTwo, 5));

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chapter 10 functions

@cruz

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#html #javascript #nodejs

How to Save HTML Form Data in JSON - Express

<form action="/new" method="post">
 
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</form>

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Replace Textarea with Codemirror editor

<link rel="stylesheet" type="text/css" href="plugin/codemirror/lib/codemirror.css">

<body>
	<textarea class="codemirror-textarea"></textarea>
</body>

<script>

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    var editor = CodeMirror.fromTextArea(codeText, {
        lineNumbers : true
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});

</script>

<script type="text/javascript" src="plugin/codemirror/lib/codemirror.js"></script>

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npm install heroku-ssl-redirect

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var Schema = mongoose.Schema;

const exampleSchema = new Schema({
    title: { type: String , required: true},
    content: [{type: String}]
});


var Example = mongoose.model('Example', exampleSchema);
module.exports = Example;

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getAttribute() - how to get the value of any attribute of HTML element

<html>

<input id="contact" name="address">

<script>

    var x = document.getElementById("contact").getAttribute('name');

</script>

</html>

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function full_stack_developer() {
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var urlParts = url.replace('http://','').replace('https://','').split(/[/?#]/);
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#javascript #javascript #functions #parameters

Required Parameters for Functions in JavaScript

 const isRequired = () => { throw new Error('param is required'); };

const hello = (name = isRequired()) => { console.log(`hello ${name}`) };

// These will throw errors
hello();
hello(undefined);

// These will not
hello(null);
hello('David');
The idea here is that it uses default parameters, like how the b parameter here has a default if you don’t send it anything:
function multiply(a, b = 1) {
  return a * b;
}

#javascript

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const object1 = {
  a: 'somestring',
  b: 42
};

for (let [key, value] of Object.entries(object1)) {
  console.log(`${key}: ${value}`);
}

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    var codeToBeCopied = document.getElementById('code-snippet').innerText;
    var emptyArea = document.createElement('TEXTAREA');
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    const parentElement = document.getElementById('post-title');
    parentElement.appendChild(emptyArea);

    emptyArea.select();
    document.execCommand('copy');

    parentElement.removeChild(emptyArea);
    M.toast({html: 'Code copied to clipboard'})

    }

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How to store fetch response in javascript variable - Stack Overflow

async function fun() {
  return fetch('https://jsonplaceholder.typicode.com/todos/1').then(res => res.json());
}

const data  = await fun();

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jQuery.post() - AJAX for post requests

$.ajax({
  type: "POST",
  url: url,
  data: data,
  success: success,
  dataType: dataType
});

Functions as data/

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chapter 10 functions

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