20 lines
310 B
Markdown
20 lines
310 B
Markdown
importance: 5
|
|
|
|
---
|
|
|
|
# Check for emptiness
|
|
|
|
Write the function `isEmpty(obj)` which returns `true` if the object has no properties, `false` otherwise.
|
|
|
|
Should work like that:
|
|
|
|
```js
|
|
let schedule = {};
|
|
|
|
alert( isEmpty(schedule) ); // true
|
|
|
|
schedule["8:30"] = "get up";
|
|
|
|
alert( isEmpty(schedule) ); // false
|
|
```
|
|
|