What does $_ mean in PowerShell? - Stack Overflow
4 $_ is a variable created by the system usually inside block expressions that are referenced by cmdlets that are used with pipe such as Where-Object and ForEach-Object. But it can be used …
python - How do I create variable variables? - Stack Overflow
I know that some other languages, such as PHP, support a concept of "variable variable names" - that is, the contents of a string can be used as part of a variable name. I heard …
Is there a JavaScript equivalent of PHP’s “variable variables”?
Unlike PHP, JavaScript doesn't offer access to the globals array (which contains references to all the variable names currently declared). As such, JavaScript does not offer native support for …
What does the @ symbol before a variable name mean in C#?
Mar 18, 2016 · I understand that the @ symbol can be used before a string literal to change how the compiler parses the string. But what does it mean when a variable name is prefixed with …
Difference between ++variable and variable++ - Stack Overflow
Difference between ++variable and variable++ Asked 11 years, 10 months ago Modified 8 years, 10 months ago Viewed 6k times
Why do we use _ in variable names? - Stack Overflow
Aug 1, 2011 · The underscore in variable names is completely optional. Many programmers use it to differentiate private variables - so instance variables will typically have an underscore …
What is the meaning of $ in a variable name? - Stack Overflow
Variable names are case-sensitive. A variable's name can be any legal identifier — an unlimited-length sequence of Unicode letters and digits, beginning with a letter, the dollar sign "$", or the …
MySQL: @variable vs. variable. What's the difference?
Function variable for which the scope ends when function exits. Package body variables defined at the top of package and outside all functions whose scope is the session and visibility is …
++someVariable vs. someVariable++ in JavaScript - Stack Overflow
Aug 12, 2010 · In JavaScript you can use ++ operator before (pre-increment) or after the variable name (post-increment). What, if any, are the differences between these ways of incrementing …
Adding a directory to the PATH environment variable in Windows
Mar 3, 2012 · I am trying to add C:\\xampp\\php to my system PATH environment variable in Windows. I have already added it using the Environment Variables dialog box. But when I type …