Map is an unordered collection of key-value pairs where each key is unique and implements hash-table data structure that offer fast lookups, adds and deletes. They are also called associative arrays or dictionaries. They are perfert for searching values. If given the key, the associated value can be retrieved very quickly. Creating map A map…
Programs store values in memory, and each memory block (or word) has an address, which is usually represented as a hexadecimal number.
Pointer is a special type that holds the address of a variable.
What’s new in PHP 7.4
PHP 7.4 was released on November 28, 2019 and it’s the last version before PHP 8. New features PHP 7.4 comes with a remarkable amount of new features. The following a list of all new features. Arrow functions Arrow functions, also called “short closures”, allow for less verbose one-liner functions. There are a few notes about…
Install Nginx + PHP + MySQL on Mac Os in 2020
This tutorial shows how to install Nginx + PHP + MySQL on Mac OS Catalina. It’s very straightforward process and doesn’t takes you more than 10 to 15 minutes. Install PHP First of all, ensure that brew brew is up-to-date and then install latest php 7.4 version. To locate your ini files type the following…
Java Data Types
Data types are very important in Java because it is a strongly typed language. All operations are type-checked by the compiler for type compatibility. Strong type checking helps prevent errors. All variables, expressions, and values have a type. Java contains two general categories of built-in data types: Object-oriented Primitive (non-object-oriented) Object-oriented types are defined by…
PHP interview question. Part 1
Install SSL with Let’s Encrypt on Centos 7
Docker-compose Tips and Tricks
Docker-compose is a very useful tool when you need to orchestrate multiple containers. Here are some useful tips and best practises. Build container Build and start containers in detached mode:
The following options available:
–no-deps – ignore the container dependency –no-cache – ignore the cache Container logs Control containers The following command will stop and the remove all…
Database normalization is a process of organizing fields and tables which reduces dependancy of data and redundancy. There are 6 normal form. In most cases it’s only need 3 normal form to achieve normalization. What normal forms are? 1NF (First Normal Form) Rules Each table cell should contain a single value Each record needs to…
SOLID principles in PHP
SOLID Principles is the rules that avoid bad design and have a clear concept for developing software in a proper way.
With the bad software design, the code can become inflexible and small changes can result in bugs. For these reasons, developers should follow SOLID Principles.