Others

Exception Handling

Any data type can be thrown as an error. It doesnt have to be an Error object.

try {
    throw 'This is just a string';
} catch (e){
    console.log(e);  // -> 'This is just a string'
}

Destructuring

const [ var1 = '', var2 = '' ] = ['thing1', 'thing2'];

const { key1: var1 = '', key2: var2 = '' } = { key1: 'thing1', key2: 'thing2' };

Async\Await

Facilitates iteration with asyncronous calls, waiting for the promise return.

Iterating over awaits

For iterating over array of promisses.

(async function() {
    try {
        const functions = [
            sum(2, 2),
            sum(4, 4),
        ];
        const results = [];
        
        for (let fn of functions) {
            const result = await fn;
            results.push(result);
        }

        const [a, b] = results;
        const c = await sum(a, b);

    } catch (e) {
        ...
    }
});

for async of

An easier way of iterating over arrays of promisses.

(async function() {
    try {
        const functions = [
            sum(2, 2),
            sum(4, 4),
        ];
        const results = [];
        
        for await (let result of functions) {
            results.push(result);
        }

        const [a, b] = results;
        const c = await sum(a, b);

    } catch (e) {
        ...
    }
});