Basic JavaScript Question:
Download Job Interview Questions and Answers PDF
How to delete an array entry using JavaScript?
Answer:
The "delete" operator removes an array element in JavaScript , but oddly does not change the size of the array.
<script type="text/javascript">
var days = ["Sunday","Monday","Tuesday","Wednesday", "Thursday","Friday","Saturday"];
document.write("Number of days:"+days.length); delete days[4];
document.write("<br />Number of days:"+days.length);
</script>
This produces
Number of days:7
Number of days:7
<script type="text/javascript">
var days = ["Sunday","Monday","Tuesday","Wednesday", "Thursday","Friday","Saturday"];
document.write("Number of days:"+days.length); delete days[4];
document.write("<br />Number of days:"+days.length);
</script>
This produces
Number of days:7
Number of days:7
Download JavaScript Interview Questions And Answers
PDF
| Previous Question | Next Question |
| What does the delete operator do? | How to use strings as array indexes using JavaScript? |