Multi-Dimensional Arrays :- In Java, a multi-dimensional array is simply an array of arrays. It allows you to storing data in a tabular format or matrix likely format. While the most common used multi-dimensional array is the 2D array, Java supports higher-dimensional arrays like 3D or 4D arrays. Syntax for Multi-Dimensional Arrays:- Here’s how …
In this article, we’ll explore how to handle file uploading in the Node.js application. File uploading is a very commonly used feature in node js web applications, it allows users to upload files such as images, videos, documents, and many more. Here we will discuss this using Multer middleware , one of the most popular …
import numpy as np # Creating a 2D array (matrix) arr = np.array([[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]]) print(arr) # Accessing the second row (index 1) print(arr[1]) # Accessing the third column (index 2) print(arr[:, 2]) # Slice a subarray from rows 1 to 2 (not including 3), columns …
I am vigneshwaralingam. I am here to explain about the vector class in Java with examples in this article.In this article we will learn about how to create a vector class in java, why we used it in java, what is the advantages and disadvantages,and full details about the vector class in Java. Java Vector …
import cv2 # Open the video capture (0 for the default camera or a video file path) cap = cv2.VideoCapture(0) # Check if the camera is opened successfully if not cap.isOpened(): print(“Error: Could not open camera.”) exit() # Get the frame width and height to define the video codec frame_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) frame_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) …
import cv2 import collections import time # Parameters video_source = 0 # Use 0 for webcam, or provide a video file path output_dir = “key_event_clips” buffer_size = 50 # Number of frames to buffer before the event clip_duration = 2 # Duration of the clip after the event (in seconds) fps = 30 # Frames …
Hi everyone, In this article we will discuss about the reflection in Java with some examples. The reflection in Java is briefly explained in the article. Reflections in Java with examples Table of contents: Introduction Key uses of reflection in Java Why we used it in Java How to create a reflection in Java Advantages …
Are you looking to start background music on the webpage load? Adding audio automatically when a page loads can greatly enhance user engagement, whether it’s soothing background music, sound effects, or a welcoming tune. In this guide, we’ll walk you through the simple and effective process of implementing this feature using JavaScript. How Does This …
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import pandas as pd # Create a sample DataFrame data = { ‘Name’: [‘Alice’, ‘Bob’, ‘Charlie’], ‘Age’: [25, 30, 35], ‘City’: [‘New York’, ‘Los Angeles’, ‘Chicago’] } df = pd.DataFrame(data) # Save DataFrame to CSV df.to_csv(‘output.csv’, index=False) # index=False excludes the index column from the CSV
import pandas as pd # Sample DataFrame data = {‘A’: [1, 2, 3], ‘B’: [4, 5, 6], ‘C’: [7, 8, 9]} df = pd.DataFrame(data) # Function to get column index by column name def get_column_index(df, column_name): try: return df.columns.get_loc(column_name) except KeyError: return f”Column ‘{column_name}’ not found” # Example usage column_name = ‘B’ index = get_column_index(df, …
Get column index from column name of a given Pandas DataFrame Read More »