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Showing posts from January, 2023

How to read a single row or of multiple txt files in python

 To read a single row or multiple rows from a text file in Python, you can use the built-in open() function to open the file, and the readline() or readlines() method to read the contents. Here's an example of how to read a single row from a text file: with open("example.txt", "r") as file:     first_line = file.readline()     print(first_line) This example uses a with statement to open the file "example.txt" in read mode ("r"). The readline() method is then used to read the first line of the file and assign it to the variable first_line. You can change the argument of readline() to any number n to read nth line of the file. Here's an example of how to read multiple rows from a text file using readlines() with open("example.txt", "r") as file:     lines = file.readlines()     for line in lines:         print(line) This example reads all the lines in the file and assign them to the variable lines, which is a list of str...

In PHP how to split string on specific character and keep that character and keep that character separate ie in its own element of an array after

 You can use the explode function in PHP to split a string on a specific character. The explode function takes two arguments: the character to split the string on (called the "delimiter"), and the string to split. It returns an array of strings, with each element in the array being a part of the original string separated by the delimiter. For example, to split a string on the character, and keep the delimiter in its own element of the resulting array, you could do the following: Copy code $string = "apple,banana,cherry"; $array = explode(',', $string); print_r($array); This would output the following: Copy code Array (     [0] => apple     [1] => banana     [2] => cherry ) Note that the delimiter is not included in any of the elements of the resulting array. If you want to keep the delimiter separate, you can use the preg_split function, which allows you to specify a regular expression as the delimiter. For example, to split a string on the ch...

Trying to add two linked lists in Python, but the resulting Linked List is printing in scientific notation

It sounds like you are trying to add two linked lists in Python, but the resulting linked list is being printed in scientific notation. Here are a few things you can try to fix this issue: Make sure that you are storing the values in the linked list nodes as integers, not floats. If the values are stored as floats, they may be displayed in scientific notation when printed. Use the str() function to convert the values in the linked list nodes to strings before adding them to the resulting linked list. This will prevent them from being displayed in scientific notation. Use the format() function to control the way the values are printed. For example, you can use format(value, '.0f') to print the value as a whole number without scientific notation. Here is an example of how you might use these approaches to add two linked lists and print the result without scientific notation: class Node:     def __init__(self, val=0, next=None):         self.val = val   ...

Unable to deliver the push notification using parse server

  There could be several reasons why you are unable to deliver push notifications using Parse Server. Here are a few things you can try to troubleshoot the issue: Verify that your Parse Server is properly configured and running. You can check the logs to see if there are any errors or warning messages. Make sure that your client app is correctly registered and configured to receive push notifications. This includes verifying that the correct push notification certificates or keys are being used. Check that the device you are trying to send the push notification to is registered and online. Make sure that you are using the correct device token or installation ID when sending the push notification. If you are using the Parse Server dashboard to send the push notification, make sure that you have the correct permissions and that the push notification is being sent to the correct audience. Check that there are no issues with the push notification service you are using (e.g. APNS for iO...