Array operations.
importance: 5
Let’s try 5 array operations.
- Create an array styles with items “Jazz” and “Blues”.
- Append “Rock-n-Roll” to the end.
- Replace the value in the middle with “Classics”. Your code for finding the middle value should work for any arrays with odd length.
- Strip off the first value of the array and show it.
- Prepend Rap and Reggae to the array.
The array in the process:
Jazz, Blues
Jazz, Blues, Rock-n-Roll
Jazz, Classics, Rock-n-Roll
Classics, Rock-n-Roll
Rap, Reggae, Classics, Rock-n-Roll
let styles = ["Jazz", "Blues"];
styles.push("Rock-n-Roll");
styles[Math.floor((styles.length - 1) / 2)] = "Classics";
alert( styles.shift() );
styles.unshift("Rap", "Reggae");