MySQL: @variable vs. variable. What's the difference?
In MySQL, @variable indicates a user-defined variable. You can define your own. SET @a = 'test'; SELECT @a; Outside of stored programs, a variable, without @, is a system variable, …
JavaScript OR (||) variable assignment explanation - Stack Overflow
Agreed, this is my favorite answer as it specifically addresses JavaScript variable assignment concerns. Additionally, if you choose to use a ternary as one of the subsequent variables to …
How do I set a variable to the output of a command in Bash?
As an aside, capturing output into a variable just so you can then echo the variable is a useless use of echo, and a useless use of variables.
SQL Server SELECT INTO @variable? - Stack Overflow
Jan 8, 2015 · INTO .. a TABLE VARIABLE. The best you can do is create it first, then insert into it. Your 2nd snippet has to be DECLARE @TempCustomer TABLE ( CustomerId …
How to set environment variables in Jenkins? - Stack Overflow
May 17, 2012 · The Environment Variables section in Jenkins doesn't do that. Instead, it sets AOEU='$(echo aoeu)'. How can I get Jenkins to evaluate a shell command and assign the …
How can I use a global variable in a function? - Stack Overflow
Jul 11, 2016 · How do I create or use a global variable inside a function? How do I use a global variable that was defined in one function inside other functions? Failing to use the global …
Defining and using a variable in batch file - Stack Overflow
370 The spaces are significant. You created a variable named 'location ' with a value of ' "bob"'. Note - enclosing single quotes were added to show location of space. If you want quotes in …
How do I get and set Environment variables in C#?
Oct 8, 2008 · I ran into this while working on a .NET console app to read the PATH environment variable, and found that using System.Environment.GetEnvironmentVariable will expand the …
How do I create a constant in Python? - Stack Overflow
Apr 21, 2010 · 4 In python, a constant is simply a variable with a name in all capitals, with words separated by the underscore character, e.g DAYS_IN_WEEK = 7 The value is mutable, as in …
What are the special dollar sign shell variables? - Stack Overflow
Sep 14, 2012 · $! is the PID of the most recent background command. $0 is the name of the shell or shell script. Most of the above can be found under Special Parameters in the Bash …