Hashing is a computation technique in which hashing functions take variable-length data as input and
It is common to select certain data or rows from a table. The rows are returned in the order in which they appear in the table. We may sometimes require that the rows we select from the table must be returned to us in ascending or descending order with re
Update command is a data manipulation command which is used to edit the records of a table. It may be used to update a single row based on a condition, all rows or set of rows based on the condition given by the user. It is used along with the SET clause,
Overview We'll learn how to use Linux commands to get the number of occurrences of a specific character in an input file. We're assuming that you know some common Linux commands, including grep, awk, and tr. We'll also suppose that our input file tpoint.t
Overview In this tutorial, we will learn how to find all links for a specific file on Linux. We will use the command lsof to list all files that are opened by any process and then grep to filter out only those files that h**e a link to our target file. Wh
In OpenCV, We use the cv2.calcHist() function to compute the histogram of an image. We can use this function to compute the histogram of a region of the image. To compute a histogram of a region in the image first we define a mask. The white color in the