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example-promise.js
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example-promise.js
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// //e2251cd4a52162add947e318a9251d78
// function getTempCallback(location, callback) {
// callback(undefined, 78);
// callback('City Not Found');
// }
//
// getTempCallback('Millersville', function (err, temp) {
// if (err) {
// console.log('error', err);
// } else {
// console.log('success', temp);
// }
// });
//
// function getTempPromise(location) {
// return new Promise(function (resolve, reject) {
// setTimeout(function () {
// resolve(79);
// reject('City Not Found');
// }, 1000);
// });
// }
//
// getTempPromise('Millersville').then(function(temp) {
// console.log('promise success', temp);
// }, function(err) {
// console.log('promise error', err);
// });
//if (typeof someVariable === 'number')
//Challenge Area -- return a promise then add them up, if both numbers, add them up, otherwise reject
function addPromise(a, b) {
return new Promise(function(resolve, reject) {
if(typeof a === 'number' && typeof b === 'number') {
resolve(a+b);
} else {
reject('Both inputs must be numbers!');
}
});
}
//call twice, once with two numbers, once with a number and a string
addPromise(7, 9).then(function(result) {
console.log('promise success', result);
}, function(err) {
console.log('promise error', err);
});
addPromise(7, 'Nick').then(function(result) {
console.log('promise success', result);
}, function(err) {
console.log('promise error', err);
});