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Nafeu Nasir nafeu

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nafeu / java-script-promises-with-async-await-and-loops-5-promisification-with-error-handling.js
Last active January 15, 2021 01:50
function delay(delayedFunction, time) {
return new Promise((resolve, reject) => {
setTimeout(() => {
try {
resolve(delayedFunction());
} catch (error) {
reject(error.message);
}
}, time);
});
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-6-basic-promise-invocation.js
Created January 15, 2021 01:50
console.log('1 | print immediately');
delay(() => '2 | print after one second', 1000)
.then(result => console.log(result));
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-7-promise-invocation-with-error.js
Created January 15, 2021 01:50
console.log('1 | print immediately');
delay(() => {
throw new Error('This is a fake error.');
return '2 | print after one second';
}, 1000)
.then(result => console.log(result))
.catch(error => console.log(error));
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-8-callback-hell.js
Last active January 15, 2021 02:01
console.log('1 | print immediately');
delay(() => '2 | print me after one second', 1000)
.then(result => {
console.log(result);
delay(() => '3 | print me one second after line 2', 1000)
.then(result => {
console.log(result);
/* ...CALLBACK HELL... */
});
});
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-9-top-level-async.js
Created January 15, 2021 01:50
function delay(delayedFunction, time) {
return new Promise((resolve, reject) => {
setTimeout(() => {
try {
resolve(delayedFunction());
} catch (error) {
reject(error.message);
}
}, time);
});
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-10-basic-await-in-main.js
Created January 15, 2021 01:50
async function main() {
console.log('1 | print immediately');
console.log(await delay(() => '2 | print after one second', 1000));
}
main();
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-11-additional-await-in-main.js
Created January 15, 2021 01:50
async function main() {
console.log('1 | print immediately');
console.log(await delay(() => '2 | print after one second', 1000));
console.log(await delay(() => '3 | print one second after line 2', 1000));
console.log(await delay(() => '4 | print one second after line 3', 1000));
console.log(await delay(() => '5 | print one second after line 4', 1000));
}
main();
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-12-old-promise-use.js
Created January 15, 2021 01:50
delay(() => '[RETURN VALUE]', 1000)
.then(result => {
console.log(result); // [RETURN VALUE] in result
});
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-13-new-promise-use.js
Created January 15, 2021 01:50
const result = await delay(() => '[RETURN VALUE]', 1000);
console.log(result); // [RETURN VALUE] in result
@nafeu
nafeu / java-script-promises-with-async-await-and-loops-14-pyramid-promises.js
Created January 15, 2021 01:50
delay(() => '[RETURN VALUE 1]', 1000)
.then(result => {
console.log(result); // [RETURN VALUE 1] in result
delay(() => '[RETURN VALUE 2]', 1000)
.then(result => {
console.log(result); // [RETURN VALUE 2] in result
});
});