serum

Clojure library of sundry utility functions and macros

Artifact

via Clojars: [waffletower/serum "0.7.0"]

Macros

and-let

Compare to: https://github.com/egamble/let-else

The and-let macro is quite similar to the Scheme and-let* special form. Being honest about my own developer history, I wanted short-circuiting behavior for bindings in Clojure somewhat analagous to optional chaining (https://en.wikipedia.org/wiki/Safe_navigation_operator) in object-oriented languages like Swift and Objective-C. Unlike and-let* in Scheme, I also wanted to support else conditions. Evan Gamble's richly featured let-else provides the facility for else handling for each individual binding. I wanted a simple blanket else behavior instead.

(and-let [a (its)
          b (not*)
          c (my)
          d (disco)]
         (fire-dj)
         (dance))

Evaluation of bindings stops should a binding evaluate falsey. In the above example, (my) and (disco) will not be evaluated when (not*) evaluates falsey.

Helpers

shift

The shift function is similar to clojure.core/partial. shift accepts a function f and returns a function of one argument mapped to the first argument of the function f:

(map (comp (shift select-keys [:name :hat :shoe-size])
    (partial filter friend?) my-people)

Tests

lein midje

License

Copyright © 2017-2018 Christopher Penrose

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.