Control flow statements 23

Question 1

What are the two operators for controlling loops while we are inside of them?

Answer 1

break and continue
break: exits the loop, like a return statement
continue: skips an iteration of the loop

Question 2

How to loop over an async iterable in ES6+?

Answer 2

for-await-of loop

Question 3

Why should you avoid for-in loop ES1?

Answer 3

its a bad choice for looping through arrays
- it visits all enumerable property keys (owned and inherited)
const arr = [1,2,3]
arr.prop = ‘prop value’
for (const key in arr) {
console.log(key)
}
// 0
// 1
// 2
// 3
// prop

safe if you’re using on objects i guess?