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We know that when we solve any image related problem, we have to take a matrix. The matrix content will vary depending upon the image type - either it would be a binary image(0, 1), gray scale image(0-255) or RGB image(255 255 255). So if we want to add of two images then that means very simple we have to add respective two matrices. In OpenCV library, we have a function cv2.add() to add the images. But for image addition the size of the two images should be same. Addition of two images import cv2 # Readingour Image1 my_firstpic ... Read More
To find the number of columns in a MySQL table, use the count(*) function with information_schema.columns and the WHERE clause. Let us see an example. Creating a table. mysql> create table NumberOfColumns -> ( -> id int, -> FirstName varchar(100), -> LastName varchar(100), -> Age int, -> Address varchar(100) -> ); Query OK, 0 rows affected (0.70 sec) Inserting records into table. mysql> insert into NumberOfColumns values(1, 'Shane', 'Watson', 36, 'Australia'); Query OK, 1 row affected ... Read More
The php_strip_whitespace() function returns source with stripped comments and whitespace. Syntax php_strip_whitespace(file_path) Parameters file_path − The path of file. Return The php_strip_whitespace() function returns stripped source code on success. Example The above code strip all the comments and whitespace.
UUID is having the full form Universal Unique Identifier, it is a python library which supports 128 bits ids for generating random objects. Advantages of UUID As discussed, we can use it to generate unique random id for random objects. For cryptography and hashing applications, this id can be used. For generating random documents and also addresses etc. this id can be used. Method1 Using uuid1() Example code import uuid print ("Random id using uuid1() is : ", end="") print (uuid.uuid1()) Output Random id using uuid1() is : 4adeede2-e5d8-11e8-bd27-185e0fd4f8b3 Representations of uuid1() bytes − ... Read More
Here two lists are given. Our task is to check and found weather two given lists are circularly identical or not. Example Input : A = [100, 100, 10, 10, 100] B = [100, 100, 100, 10, 10] Output : True Explanation True as when these elements in the list will circularly rotate then they would be similar to other given list Algorithm Step 1: Create First and Second List. Step 2: Then Lists are converted to map. Step 3: join () method is used for converting the ... Read More
The photomosaic is a technique, where we can split our image into a grid of squares. Each square will be replaced by some other images or colors. So when we want to see the actual image from a certain distance, we can see the actual image, but if we come closer, we can see the grid of different colored blocks. In this case we are using a Python module called photomosaic. Using this module, we can easily create some photomosaics. To install it please follow this link. It will also download the scikit learn module. sudo pip3 install photomosaic ... Read More
The time_sleep_until() function delays execution of the current script until the specified time. Syntax time_sleep_until(time) Parameters time − The time until execution will delay. Return The time_sleep_until() function returns true on success. Example The execution of the above script is now delayed for 15 seconds.
All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element. Firstly, declare an array. int[] rank; But declaring an array does not initialize the array in the memory. When the array variable is initialized, you can assign values to the array. Array is a reference type, so you need to use the new keyword to create an instance of the array. For example, int[] rank = new int[5]; You can assign values to an array at the time of declaration. int[] rank ... Read More
The .NET Framework 4 introduced System.Collections.Concurrent namespace. The namespace has numerous collection classes. These classes are both thread-safe and scalable. Multiple threads can safely add or remove items from these collections, The following concurrent collection types use lightweight synchronization mechanisms: SpinLock, SpinWait, etc. These are new in .NET Framework 4. Let us see the concurrent collection in C# − Sr.No. Type & Description 1 BlockingCollection Bounding and blocking functionality for any type. 2 ConcurrentDictionary Thread-safe implementation of a dictionary of key-value pairs. 3 ConcurrentQueue Thread-safe implementation of a FIFO ... Read More
Sometimes we need to use more than one condition checking in a single statement. There are some basic syntax for these kind of checking is x < y < z, or if x < y and x < z etc. Like other languages, there are some basic comparison operators in Python. These comparison operators are =, ==, !=, is, is not, in, not in. The precedence of these operators are same, and the precedence is lesser than arithmetic, bitwise and shifting operators. These operators can be arranged arbitrarily. They will be used as a chain. So for an example, if ... Read More