What is the difference between $ {var}, "$var", and "$ {var}" in the ...
Aug 9, 2013 · What the title says: what does it mean to encapsulate a variable in {}, "", or "{}"? I haven't been able to find any explanations online about this - I haven't been able to refer to them except for...
What is the difference between "let" and "var"? - Stack Overflow
Apr 18, 2009 · Scoping rules The main difference is scoping rules. Variables declared by var keyword are scoped to the immediate function body (hence the function scope) while let variables are scoped …
What is the purpose of the var keyword and when should I use it (or ...
Apr 13, 2012 · var x = 1 declares variable x in current scope (aka execution context). If the declaration appears in a function - a local variable is declared; if it's in global scope - a global variable is declared.
linux - What goes in /var? - Stack Overflow
Aug 29, 2013 · 123 That description of /var is self-contradictory. /var contains things that are prone to change, such as websites, temporary files (/var/tmp) and databases. The name is an abbreviation of …
javascript - Difference between var = {} and var = []? - Stack Overflow
Possible Duplicate: Objects vs arrays in Javascript for key/value pairs I have a variable in JavaScript which I am using like a hash. I can initialize it like: var selected = []; or var selec...
Docker: Got permission denied while trying to connect to the Docker ...
Dec 17, 2017 · Also, do not change permissions of the /var/run/docker.sock to 777 or stuff like that because that is a big security risk, you are basically giving everyone permission to use docker on …
ERROR 2002 (HY000): Can't connect to local MySQL server through …
The server immediately crashed because it no longer had write access to the mysql folder. To fix it, I ran chown -R mysql:mysql /var/mysql to restore the correct permissions, then did service mysql start to …
c# - How to initialize var? - Stack Overflow
May 25, 2010 · C# is a strictly/strongly typed language. var was introduced for compile-time type-binding for anonymous types yet you can use var for primitive and custom types that are already known at …
What is the difference between var and val in Kotlin?
Jun 5, 2017 · 203 Both val and var are used to declare variables. var is like general variable and it's known as a mutable variable in Kotlin and can be assigned multiple times. val is like final variable …
docker error: /var/run/docker.sock: no such file or directory
There will be no socket file /var/run/docker.sock in this case. But docker cli will try to connect to the docker daemon via the docker.sock socket file, that's where the problem comes from.