Booleans ¶ This is the simplest type. A bool expresses a truth value. It can be either TRUE or FALSE. Syntax ¶ To specify a bool literal, use the constants TRUE or FALSE. Both are case-insensitive.$foo = True; // assign the value TRUE to $foo?> Typically, the result of an operator which returns a bool value is passed on to a control structure. Converting to boolean ¶ To explicitly convert a value to bool, use the (bool) or (boolean) casts. However, in most cases the cast is unnecessary, since a value will be automatically converted if an operator, function or control structure requires a bool argument. See also Type Juggling. When converting to bool, the following values are considered FALSE: the boolean FALSE itself the integers 0 and -0 (zero) the floats 0.0 and -0.0 (zero) the empty string, and the string “0” an array with zero elements the special type NULL (including unset variables) SimpleXML objects created from empty…
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Comments in PHP
PHP supports ‘C’, ‘C++’ and Unix shell-style (Perl style) comments. For example: The “one-line” comment styles only comment to the end of the line or the current block of PHP code, whichever comes first. This means that HTML code after // ... ?> or # ... ?> WILL be printed: ?> breaks out of PHP mode and returns to HTML mode, and // or # cannot influence that. This is an example The header above will say 'This is an example'. ‘C’ style comments end at the first */ encountered. Make sure you don’t nest ‘C’ style comments. It is easy to make this mistake if you are trying to comment out a large block of code.
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When Facing the Unknown, Agility is Your Superpower
Source: CIO UKIn March, as the number of coronavirus infections grew exponentially across the United States, SkyLakes Medical Center in rural Oregon prepared for an influx of patients. In 48 hours, they renovated and opened an entire floor that had not been used for patient care in years. The city of Buffalo, New York knew its non-emergency and city services hotline was going to be more important than ever. Realizing they needed to field calls while working from home, they routed everything through the University of Buffalo’s managed call system (wow, nice teamwork). If you are a parent, you likely remember the exact moment your child, along with millions of others, was sent home…
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Using the Python Interpreter
Source: Python.org The Terms ‘Interactive’ and ‘Shell’ The term “interactive” traces back to the Latin expression “inter agere”. The verb “agere” means amongst other things “to do something” and “to act”, while “inter” denotes the spatial and temporal position to things and events, i.e. “between” or “among” objects, persons, and events. So “inter agere” means “to act between” or “to act among” these. With this in mind, we can say that the interactive shell is between the user and the operating system (e.g. Linux, Unix, Windows or others). Instead of an operating system an interpreter can be used for a programming language like Python as well. The Python interpreter can…
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Virtualenv
Source: VirtualEnv virtualenv is a tool to create isolated Python environments. Since Python 3.3, a subset of it has been integrated into the standard library under the venv module. The venv module does not offer all features of this library, to name just a few more prominent: is slower (by not having the app-data seed method), is not as extendable, cannot create virtual environments for arbitrarily installed python versions (and automatically discover these), is not upgrade-able via pip, does not have as rich programmatic API (describe virtual environments without creating them). The basic problem being addressed is one of dependencies and versions, and indirectly permissions. Imagine you have an application that needs version 1 of LibFoo, but another application requires version 2.…
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PHP tags
When PHP parses a file, it looks for opening and closing tags, which are and ?> which tell PHP to start and stop interpreting the code between them. Parsing in this manner allows PHP to be embedded in all sorts of different documents, as everything outside of a pair of opening and closing tags is ignored by the PHP parser. PHP includes a short echo tag which is a short-hand to the more verbose PHP also allows for short open tag (which is discouraged since it is only available if enabled using the short_open_tag php.ini configuration file directive, or if PHP was configured with the –enable-short-tags option). If a file contains only PHP code, it is preferable to omit…
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Open Source Licenses Types
Every once in a while, community uproar over contentious open source licensing in a popular product will grab headlines, causing all of us to debate what open source licenses are really about. Last year it was the Apache Foundation’s ban of components with Facebook React’s contentious patent clause which caused a stir that sent developers running for the Reddit boards. These past few months, Redis Labs and MongoDB have made changes in the open source licenses of some of their most popular open source databases, leaving many to scratch their heads, highlighting the need to have open source licenses explained in human speak. The simplest explanation is that open source licenses are legal and binding contracts…
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What is open source?
The term open source refers to something people can modify and share because its design is publicly accessible. Source: opensource.The term originated in the context of software development to designate a specific approach to creating computer programs. Today, however, “open source” designates a broader set of values—what we call “the open source way.” Open source projects, products, or initiatives embrace and celebrate principles of open exchange, collaborative participation, rapid prototyping, transparency, meritocracy, and community-oriented development. What is open source software? Open source software is software with source code that anyone can inspect, modify, and enhance. “Source code” is the part of software that most computer users don’t ever see; it’s the code…
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Best Python Frameworks
What do Python programmers need to make their life easier? The answer is frameworks. By automating the implementation of redundant tasks, frameworks cut development time and enable developers to focus greatly on application logic rather than routine elements. Because it is one of the leading programming languages, there is no scarcity of frameworks for Python. Different frameworks have their own set of advantages and issues. Hence, the selection needs to be made on the basis of project requirements and developer preference. There are primarily three types of Python frameworks, namely full-stack, micro-framework, and asynchronous. Before moving onto discussing the best Python frameworks to go for in 2020, let’s first take a…
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Popular PHP Frameworks For Web Development in 2020
Today, you can see a lot of advertising in which the company makes a landmark for 2020. The beginning of a new decade always marks a big change. For example, the first iPad appeared exactly at the start of 2010. It was a huge step forward in the development of tablets and computer technology in general. Source: https://merehead.com/People are waiting from 2020 something supernatural, although it remains quite a bit. In fact, the near future of web development is already known today. Some trends appeared a year earlier. What are Best PHP Frameworks to use in 2020? Here is the list of the Best PHP Frameworks to use in 2020 are: Laravel Symfony Code…
