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week1_day3 - JS - Objects.html
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week1_day3 - JS - Objects.html
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<!DOCTYPE html>
<html lang="es">
<head>
<title>JS</title>
<meta charset="utf-8">
</head>
<body>
<h1>JS | Objects</h1>
<div id="result"></div>
<script>
// literal object declaration structure
var objName = {
keyOne: 'value 1',
keyTwo: 'value 2',
keyThree: 'value 3',
keyN: 'value n'
}
// literal object access
console.log(objName); // full object
console.log(objName.keyTwo); // dot notation
console.log(objName['keyThree']); // brackets notation
// object declaration
var student = {
firstName: 'Germán',
surname: 'Álvarez',
age: 32,
height: 1.72,
celiac: false,
birth: new Date(1986,2,10),
allergies: undefined,
hobbies: ['Escalada', 'Gadgets'],
courses: {
js: {
name: 'Javascript puro',
hours: 240,
passed: true
},
node: {
name: 'NodeJS',
hours: 320,
passed: true
},
mongo: {
name: 'MongoDB',
hours: 50,
passed: false
}
},
salary: {
base: 2890,
IRPF: 320
}
}
console.log(student.presentation);
student.shout('¡Yabadabadú!');
// add external property
student.glasses = true;
if (student.glasses) {
console.log('Y utiliza lentes');
}
// update property value
student.age = 33; // set value
console.log(student.age); // get value
// check existance of property
console.log('age' in student); // true
// delete property
console.log(student.birth);
delete student.birth;
console.log(student.birth);
// iteration basic
for (i in student) {
console.log(student[i])
}
// semantic keys iteration
var keysArr = Object.keys(student);
console.log(keysArr);
// semantic values iteration
var valuesArr = Object.values(student);
console.log(valuesArr);
// add new element at the end of Array
console.log(student.hobbies);
student.hobbies.push('Programación', 'Gamificación');
console.log(student.hobbies);
</script>
</body>
</html>