Quickutilβ

There are 4 utilities.

letf* v1.0

Given a list of bindings whose keys are places and whose values are forms, set them for the duration of body, but restore their values (as visible upon evaluation of this macro) upon completion. The restoration is ensured with unwind-protect.

Provides

letf*

Requires

zip, appendf

languagebinding

Source Code

let1 v1.0

Bind VAR to VAL within BODY. Equivalent to LET with one binding.

Provides

let1

languagebinding

Source Code

if-let v1.0

Creates new variable bindings, and conditionally executes either then-form or else-form. else-form defaults to nil.

bindings must be either single binding of the form:

(variable initial-form) 

or a list of bindings of the form:

((variable-1 initial-form-1)  
 (variable-2 initial-form-2)  
 ...  
 (variable-n initial-form-n)) 

All initial-forms are executed sequentially in the specified order. Then all the variables are bound to the corresponding values.

If all variables were bound to true values, the then-form is executed with the bindings in effect, otherwise the else-form is executed with the bindings in effect.

Provides

if-let

bindingalexandria

Source Code

when-let v1.0

Creates new variable bindings, and conditionally executes a series of forms.

Provides

when-let, when-let*

bindingalexandria

Source Code