, Chain Link
, Crop Ratio
, Category Tree
, Programmer Teacher
, Read First Line
, Numbers to Text
, Array Sum
, Last Key
, Word Count
, Log Parser
, View Count
, Unique Numbers
, Array Search
, Read Write Execute
, Date Transform
PHP is a widely used general-purpose scripting language that is especially well suited for web development.
A programmer should use a language as a tool, always taking advantage of language-specific data types and built-in functions.
Choosing the right data structure to solve a problem can have huge implications on the performance of an application. Knowing when to use a specific data structure is one of the most important skills for a programmer.
Everyone makes mistakes. A good programmer should be able to find and fix a bug in their or someone else's code.
An array is a container of a fixed number of objects of a similar type. It is a fundamental component of most programming languages.
Iteration is the act of repeating a process, or cycling through a collection. Iteration is one of the fundamental flow control tools available to developers.
Object-oriented programming is a paradigm based on encapsulating logic and data into objects, which may then contain fields and procedures. Many of the most widely used programming languages are based on OOP, making it a very important concept in modern programming.
Exceptions exist in most modern programming languages, making it important for a programmer to understand them and know how to handle them.
The string data structure is used to represent text. It is one of the most commonly used data structures. Therefore, every programmer should be skilled at string manipulation.
Familiarity with data serialization to and from formats such as XML and JSON is important as it is commonly used for interprocess communication
Every programmer should be familiar with data-sorting methods, as sorting is very common in data-analysis processes.
Arithmetic is a fundamental branch of mathematics. An understanding of arithmetic concepts, and their application, is important for every candidate.
Every programmer should be familiar with data-searching methods, as they are very common in data-analysis processes.
A stream is a sequence of data elements made available over time. It is particularly useful for tasks that may benefit from being asynchronous, including tasks such as I/O processing or reading from a file, and as such is important for developers to understand.
When designing and/or analyzing an algorithm or data structure, it is important to consider the performance and structure of an implementation. Algorithmic thinking is one of the key traits of a good programmer, especially one working on complex or performance-critical code.
A good programmer should be familiar with when to use recursive functions, since they can provide elegant solutions for complex problems.