"Create-copy" and "create-alias" are better ways to describe the concepts. This post describes pass-by-value as create-copy, and pass-by-reference as create-ali

"Create-copy" and "create-alias" are better ways to describe the concepts. This post describes pass-by-value as create-copy, and pass-by-reference as create-alias. Create-copy - Copies the data into a new memory location, so modifying this variable will not modify the original variable. Create-alias - Creates a new name for the same memory location, so modifying one variable will also modify the other variable. Having spent too much time in Powershell, which defaults to create-copy, it was jarring to switch to Javascript and the seemingly-non-deterministic behavior of create-alias on setting a new variable equal to an array. From an algebraic perspective, when I modify "foo", I expect "bar" to remain the same.