Phonebook | Phonebook Directory with php

Beginner here.

I'm trying to get the exact time, when this operation was executed successfully and print it on label. The problem is that when I click the button, the label doesn't update the text.

I am new to C++.In order to learn this, I am making a phonebook application which uses C++ concepts and functionalities. I have made two classes, phonebook and features; the phonebook class uses all functions of features, and the features class uses functions of phonebook.

But, when I am trying to pass a features class object to phonebook functions as an argument, the compiler gives an error that "features is not a type".

Why this error is coming – features is a class here not a datatype? How can I resolve this issue?

Please see below code:

I have tried this query but it didn't work:

I'm having trouble understanding a very weird bug while doing Part 2 on Full Stack Open. In few words: passing an object to the component turns the object into a nested object. Namely:

I'm a new engineer and I'm writing a simple phone book app in Python. It's pretty self explanatory, as it's a beginner project. When I was writing the function I forgot to tell it what to do if a entry that was being search wasn't found.

I have looked at several examples, and to the best of my growing knowledge base, coded what I thought was correct. I am getting an error and would like to understand it.

Also, optimization is key, so one of my objectives is to learn to code for optimization the first time.

I am currently trying to create a phonebook with a linked list. I am focusing first on the insertion function but the problem is that once I create 3 - 5 nodes, onlineGDB shows the error "malloc : corrupted top size", and VS Code shows that I got a segmentation error.

I assume this is an error with the way I am allocating memory. This is the first time that I am working on a structure that contains strings as data instead of integer so I might have missed a thing or two.

New to MongoDb, I am working on a small phonebook application where the user can add and remove phonebook entries using a name and phone number. I am able to successfully add and delete entries and have the database updated successfully, but not sure how to get the number of total entries/queries in a specific MongoDB collection.

MongoDB module:

I have built an app which fetches contacts from phonebook and saves their name and photo. To save the photo I've used the following code

I have a MySQL database with German "Umlaute öäü" in a table and I need to write a Go app that reads the table, encode it to ISO-8859-1 and write it to a text file.

So far so good, but the encoding to iso-8859-1 is not working. I have tried to debug this.

Here some details and information:

MySQL The MySQL database is UTF8, also the table itself. Also other character sets should be fine, except the character_set_server, but I think this is not relevant here, it should be just a default for new databases as far as I know.

When I query the database with the following SQL, I get the correct UTF8 encoded text: