In Laravel, it is a common mistake to use PHP’s empty() function to check if a collection is empty. When empty() is used on an empty array [] the boolean value of true is returned. However, using empty() on a collection can cause unexpected results because when a collection has no values the empty() function …
This page contains affiliate links to Amazon. As an Amazon Associate I earn from qualifying purchases. I have been using a computer that I built in 2014 or possibly 2013. This PC was still running Windows 7 that Microsoft ended support for on January 14, 2020. This computer had 16GB of RAM which at that …
The previous article explained how the isset() language construct is used to check that a variable is defined and has a value before using it. The empty() language construct is another option that can be used to check if a variable has a value that can be used. empty() is used to check if a …
When programming, it can be important to check if a variable has been declared in memory and if it has a value before using the variable. This may seem unnecessary because a developer can just declare a variable and assign it a value before using the variable. However, as developers we often need to use …
In PHP, there are two options when comparing values in a condition. These comparison options are loose comparison (==) and strict comparison (===). PHP is a loosely typed language which means that variables can be assigned different data types during execution of the application and different data types can be compared in a conditional. This …
PHP – Loose Comparison (==) VS Strict Comparision (===) Read More »
In Linux, an alias is used as a command that is a shortcut for another command. Aliases are often used to type a command without typing the extra options that are needed. This can save time by needing to type less for commands that are used often and reduce time referencing documentation for a command. …
In SQL, when writing queries to check if column values are NULL it is common to attempt WHERE conditions using ‘column_name = NULL’ or ‘column_name != NULL’ or ‘column_name <> NULL‘. Trying to check if a column is NULL using equal or not equal will actually provide incorrect results. This article will cover how to …
SQL – How To Write Queries For NULL Values – IS NULL And IS NOT NULL Read More »
In Javascript, there are two options when comparing values in a condition. These comparison options are equality (==) and strict equality (===). Javascript is a loosely typed language which means that variables can be assigned different data types during execution of the application and different data types can be compared in a conditional. In strictly …
Javascript – Equality (==) Operator VS Strict Equality (===) Operator Read More »
When debugging javascript it is common to use console.log() to print variables or messages to the browser’s dev tools console. The dir() method is another tool for logging that can be useful in certain situations. From the MDN Web Docs, console.dir() is given the following description: “The method console.dir() displays an interactive list of the properties of …
Javascript – When To Use console.dir() Instead Of console.log For Debugging Read More »
In C#, a list is a variable that is able to store multiple values of the same type and those values can be accessed by an index. This is similar to arrays which were covered in the previous post. However, unlike arrays, the size of the list does not need to be set at declaration …