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2025-10-30 18:30:29 +00:00
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Home.md

@@ -45,32 +45,3 @@ cdr returns the second item of a cons cell.
list is a function takes any number of parameters, and produces a list containing only those elements in the order passed to it. list is a function takes any number of parameters, and produces a list containing only those elements in the order passed to it.
## Definition
- set
sets a symbol's bound value. set always finds the most local definition. For example, the following evaluates to 5:
```
(def myvar 4)
(defn myfunction (myvar)
(set myvar 5)
myvar)
(myfunction 4)
```
And the global `myvar` will still equal 4 after this. However, set _can_ potentially modify global definitions when
the "most local" definition for the given symbol belongs to the global environment. `myvar` would actually
be modified in the following example:
```
(def myvar 4)
(defn myfunction ()
(set myvar 5)
myvar)
(myfunction)
```
This returns 5, and `myvar` will evaluate to 5 afterwards.
Using set for a symbol that doesn't have a binding in the current environment is an error.