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Instanceof and typeof #30

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Instanceof and typeof #30

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05a3d10
empty statte
AbdouCondeGit Jun 4, 2024
0f5a8ca
chanllenge Ok: Use strict
AbdouCondeGit Jun 4, 2024
650f2e8
okay
AbdouCondeGit Jun 14, 2024
e2ff305
Arrow function does not have own this, they are attached to the surro…
AbdouCondeGit Jul 21, 2024
08706da
tempCodeRunner.js
AbdouCondeGit Jul 21, 2024
5bf3645
Arrow function's this is the lexical context in wich they have been d…
AbdouCondeGit Jul 22, 2024
53a3d57
arrow function cannot be used as function constructor
AbdouCondeGit Jul 23, 2024
cc46079
typeof(function instance) = function not object
AbdouCondeGit Jul 23, 2024
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17 changes: 17 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,26 @@
<head>
<title>ES6</title>
<link rel="icon" type="image/png" href="favicon.png" />
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
crossorigin="anonymous">
</head>

<body>
<br />
<ul class="nav nav-tabs">
<li class="nav-item">
<a class="nav-link active" href="#">Main</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contacts</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Register</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Login</a>
</li>
</ul>
<script src="index.js"></script>
</body>

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45 changes: 18 additions & 27 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,30 +1,21 @@
/*
Modify "personInfo" function to match console.log output at the end of the challenge.
/*typeof return's type is "string". The value is :
1- the underlying primitive type for primitive type operands (string, number, undefined, boolean, etc...)
2- "object" for all reference types
3- "object" for null
4- "function" for functions
*/

Object that is returned by "personInfo" function must contain only shorthand property names.
*/
// console.log(typeof(undefined)) //undefined
// console.log(typeof(null)) //object
// console.log(typeof({})) //object
// console.log(typeof([])) //object not array
// console.log(typeof( ()=>{})) //function not object
// console.log(typeof( function(){})) //function not object
// console.log(typeof( function(){})) //function not object

const personInfo = (/* parameters */) => {
/* return ... */
};
/* Intanceof :
1- always return false for primitive types as they don't have function constructor in the proto list
2- true if the function constructor on the right is in the proto list of the argument

const person = {
name: "Alice",
age: 19,
location: {
country: "England",
city: "London"
}
};

console.log(personInfo(person));
/*
{
name: "Alice",
personAge: 19,
origin: "England",
homeCity: "London",
friendsQty: 0,
recordCreatedAt: *current year*
}
*/

*/
2 changes: 2 additions & 0 deletions tempCodeRunnerFile.js
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@@ -0,0 +1,2 @@
var type= typeof []
console.log(type)