Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Related questions
Concept explainers
Question
![### JavaScript Array Methods: pop()
#### pop()
The `pop()` method removes the last element from an array.
The return value of the `pop()` method is the removed item.
```html
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<h2>JavaScript Array Methods</h2>
<h2>pop()</h2>
<p>The pop() method removes the last element from an array.</p>
<p>The return value of the pop() method is the removed item.</p>
<p id="demo1"></p>
<p id="demo2"></p>
<p id="demo3"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = fruits;
document.getElementById("demo2").innerHTML = fruits.pop();
document.getElementById("demo3").innerHTML = fruits.shift();
</script>
</body>
</html>
```
#### Explanation
The above code demonstrates the use of the JavaScript `pop()` method, which is used to remove the last element from an array. Here's the breakdown:
1. An array `fruits` is defined with the elements `["Banana", "Orange", "Apple", "Mango"]`.
2. The content of this array is displayed in a paragraph element with the id `demo1`.
3. The `.pop()` method is called on the `fruits` array, removing the last element (`"Mango"`) and returning its value to be displayed in a paragraph element with the id `demo2`.
4. The `.shift()` method is also called on the `fruits` array, removing the first element (`"Banana"`) and returning its value to be displayed in a paragraph element with the id `demo3`.
**Expected Output:**
- **demo1:** `Banana,Orange,Apple` (After removal of "Mango")
- **demo2:** `Mango` (The element removed by `pop()`)
- **demo3:** `Banana` (The element removed by `shift()`)](https://content.bartleby.com/qna-images/question/ad1b3f56-a3c9-4d59-9a30-165fb680e6c9/edae3fdf-272a-44c1-a743-9b430f469063/o3skxgd_processed.png)
Transcribed Image Text:### JavaScript Array Methods: pop()
#### pop()
The `pop()` method removes the last element from an array.
The return value of the `pop()` method is the removed item.
```html
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<h2>JavaScript Array Methods</h2>
<h2>pop()</h2>
<p>The pop() method removes the last element from an array.</p>
<p>The return value of the pop() method is the removed item.</p>
<p id="demo1"></p>
<p id="demo2"></p>
<p id="demo3"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = fruits;
document.getElementById("demo2").innerHTML = fruits.pop();
document.getElementById("demo3").innerHTML = fruits.shift();
</script>
</body>
</html>
```
#### Explanation
The above code demonstrates the use of the JavaScript `pop()` method, which is used to remove the last element from an array. Here's the breakdown:
1. An array `fruits` is defined with the elements `["Banana", "Orange", "Apple", "Mango"]`.
2. The content of this array is displayed in a paragraph element with the id `demo1`.
3. The `.pop()` method is called on the `fruits` array, removing the last element (`"Mango"`) and returning its value to be displayed in a paragraph element with the id `demo2`.
4. The `.shift()` method is also called on the `fruits` array, removing the first element (`"Banana"`) and returning its value to be displayed in a paragraph element with the id `demo3`.
**Expected Output:**
- **demo1:** `Banana,Orange,Apple` (After removal of "Mango")
- **demo2:** `Mango` (The element removed by `pop()`)
- **demo3:** `Banana` (The element removed by `shift()`)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 4 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Write a code segment that transfers items from a full array to a singly linked structure. The operation should preserve the ordering of the items. *PYTHONarrow_forwardPart 5: JavaScript - Displaying the Input The next step is to display the user input on the HTML page. The input data is stored in the array, so each element in the array will become a separate line of output on the web page. Eventually, we will ensure the output is all upper case, and that each line of text is a different, random color. Below is an example of the final output, assuming the user input a, b, c, and then finally nothing. To display the output, you will need to use another loop structure: for, while, or do...while. You choose. Before outputting to the browser, first, output to the console to ensure your looping works. >> Use an appropriate loop structure to loop through the input data array, and output each array item to the console. Now that you're working with the data, you might as well make adjustments to ensure each item is now displayed as upper case. >> Make coding changes to display the input data output to the console as all upper case content. Now…arrow_forwardC++arrow_forward
- Provide some concrete instances of how computers are used in both business and everyday life.arrow_forwardAll code in Javascript A: For the following array items2.2, 3.3, 4.4, 6.5, 4.4, 10.2, 6.7, 7.1, 8.8, 9.9 display each element forward and reverse using while loop B: For the following array items 2.2, 3.3, 4.4, 1.1, 2.0, 1.2, 0.7, 0.1, 0.8, 0.9 compute and display the average using for, do-whole, while. B: For the following array items 2.1, 3.2, 4.5, 6.0, 4.5, 1.5, 6.0, 7.0, 6.0, 9.0 prompt the user for a number and display if the number entered is or is not in the array. D: For the following array items 2, 3, 4, 6, 4, 1, 6, 7, 6, 9 prompt the user for a number and display if the number entered is or is not in the array.arrow_forward2 = 0 ) { numList [ i ] i } } } [1, 2, 3, 4, 5] [0, 2, 4, 6, 8] [2, 4, 6, 8, 10] [1, 3, 5, 7, 9]arrow_forward
- vWhat happens when an object such as an array is no longer referenced by a variable?arrow_forwardMethod Details: public static java.lang.String getArrayString(int[] array, char separator) Return a string where each array entry (except the last one) is followed by the specified separator. An empty string will be return if the array has no elements. Parameters: array - separator - Returns: stringThrows:java.lang.IllegalArgumentException - When a null array parameter is providedarrow_forwardUSE JAVASCRIPT AND HTMLarrow_forward
- 5. Calculate the means of the rows and assign it to a variable called x5 # YOUR CODE HERE raise NotImplementedError() assert (x5 np.array([ 2., 5., 8., 11., 14.])).all()arrow_forwardJava code pleasearrow_forward#Steps: Create a Main class. Declare an ArrayList in the main() method and store the given values in it. Create an array called output of the size of the ArrayList. Iterate through for-loop to get each element from the array List and load it into the array using the get() method of the list. Print the array to see the loaded elements. import java.util.ArrayList; import java.util.List; public class Main { public static void main(String[] args) { List<String> nameList = new ArrayList<String>(); nameList.add("Robert"); nameList.add("Samson"); nameList.add("Alex"); nameList.add("William"); System.out.println("Elements of List: " + nameList); // Create an array of the same size as nameList Hint: use size() method // Fetch the elements from the nameList and insert into newly created array // Hint: Use get() method to fetch the elements from…arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON 
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education