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August 18, 2018 23:10
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Having "fun" with YavaScript objects
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// Creating ALF object | |
const alf = { | |
name: 'Gordon Shumway', | |
'home-planet': 'Melmac', | |
likes: ['cats', 'jokes', 'mischief'], | |
eatCat: function() { | |
return new Promise(function(resolve, reject) { | |
const isAbleToCatchCat = Math.floor(Math.random() * 2); | |
setTimeout(function() { | |
if (isAbleToCatchCat) { | |
resolve('Cat was eaten'); | |
} else { | |
reject('Cat got away'); | |
} | |
}, 1000); | |
}); | |
} | |
} | |
console.log(alf); | |
console.log(alf['home-planet']); | |
console.log(alf.likes[1]); | |
/* | |
Output: | |
{ name: 'Gordon Shumway', | |
'home-planet': 'Melmac', | |
likes: [ 'cats', 'jokes', 'mischief' ], | |
eatCat: [Function: eatCat] } | |
Melmac | |
jokes | |
*/ | |
// Having ALF attempt to eat a cat | |
// Using promises | |
alf.eatCat().then(function(resolve) { | |
console.log(resolve); | |
console.log('Alf ate, but could eat again'); | |
}).catch(function(reject) { | |
console.log(reject); | |
console.log('Alf is still hungry'); | |
}); | |
/* | |
Cat got eaten Output: | |
Cat was lunch | |
Alf ate, but could eat again | |
Cat got away Output: | |
Cat got away | |
Alf is still hungry | |
*/ | |
// Using async/await | |
const eatAlf = async function() { | |
try { | |
result = await alf.eatCat() | |
console.log(result); | |
console.log('Alf is crazy'); | |
} catch (error) { | |
console.log(error); | |
} | |
console.log('I wonder what the cat population is like on Melmac') | |
} | |
eatAlf(); | |
/* | |
Cat got eaten Output: | |
Cat was lunch | |
Alf is crazy | |
I wonder what the cat population is like on Melmac | |
Cat got away Output: | |
Cat got away | |
I wonder what the cat population is like on Melmac | |
*/ |
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