Top "Dollar-sign" questions

Anything related to the dollar symbol `$` and its special meanings in programming.

What are the special dollar sign shell variables?

In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return …

bash environment-variables dollar-sign
Dollar sign before a variable

I have this sample code to create a new data frame 'new_data' from the existing data frame 'my_data'. …

r dataframe r-faq dollar-sign
What does the $ mean when running commands?

I've been learning Python, and I keep running into the $ character in online documentation. Usually it goes something like this: $ …

python command installation dollar-sign
How to escape dollar sign ($) in a string using perl regex

I'm trying to escape several special characters in a given string using perl regex. It works fine for all characters …

regex perl special-characters dollar-sign
When/why to prefix variables with "$" when using jQuery?

Possible Duplicate: Why would a javascript variable start with a dollar sign? I see people using the dollar sign in …

javascript jquery variables dollar-sign
What are '$$' used for in PL/pgSQL

Being completely new to PL/pgSQL , what is the meaning of double dollar signs in this function: CREATE OR REPLACE …

postgresql plpgsql quotes dollar-sign dollar-quoting
How to echo a variable containing an unescaped dollar sign in bash

If I have a variable containing an unescaped dollar sign, is there any way I can echo the entire contents …

bash escaping dollar-sign
What does the "$" character mean in Ruby?

Been playing with Ruby on Rails for awhile and decided to take a look through the actual source. Grabbed the …

ruby-on-rails ruby global-variables dollar-sign load-path
What does $ mean/do in Haskell?

When you are writing slightly more complex functions I notice that $ is used a lot but I don't have a …

haskell syntax operators dollar-sign
Currency Formatting Canadian English and French

I have a requirement to set the value based on the locale. I will get the locale either en_US …

java locale dollar-sign currency-formatting