What does $_ mean in PowerShell? - Stack Overflow
4 $_ is a variable created by the system usually inside block expressions that are referenced by cmdlets that are used with pipe such as Where-Object and ForEach-Object. But it can be used …
What does the @ symbol before a variable name mean in C#?
Mar 18, 2016 · I understand that the @ symbol can be used before a string literal to change how the compiler parses the string. But what does it mean when a variable name is prefixed with …
MySQL: @variable vs. variable. What's the difference?
Function variable for which the scope ends when function exits. Package body variables defined at the top of package and outside all functions whose scope is the session and visibility is …
Adding a directory to the PATH environment variable in Windows
Mar 3, 2012 · I am trying to add C:\\xampp\\php to my system PATH environment variable in Windows. I have already added it using the Environment Variables dialog box. But when I type …
"cannot access local variable 'a' where it is not associated with a ...
Nov 12, 2022 · To access a global variable within a function you must specify it with global. Otherwise, the variable inside the function is a local variable that only has utility inside that …
What is the difference between "let" and "var"? - Stack Overflow
Apr 18, 2009 · A variable defined using a var statement is known throughout the function it is defined in, from the start of the function. (*) A variable defined using a let statement is only …
What is the purpose of the dollar sign in JavaScript?
Mar 29, 2022 · A '$' in a variable means nothing special to the interpreter, much like an underscore. From what I've seen, many people using jQuery (which is what your example …
whats the difference between: %%a and %variable% variables?
Jun 24, 2016 · 54 %variable% are environment variables. They are set with set and can be accessed with %foo% or !foo! (with delayed expansion if enabled). %%a are special variables …
c++ - What are the differences between a pointer variable and a ...
30 A reference is an alias for another variable whereas a pointer holds the memory address of a variable. References are generally used as function parameters so that the passed object is …
Why would a JavaScript variable start with a dollar sign?
The questions wasn't 'Can a JavasScript variable start with a $?', but 'Why would a ...' . thee OP was looking for a reason to use such a naming convention. Protected question. To answer this …