let-map

Status

Why?

Abbreviation of constructs where you let vars and then want to create a map.

(let [a 1
      b (inc a)]
  {:a a
   :b b}

Usage

namespace: let-map

(require '[dsann.let-map :refer [let-map])

(let-map
  a 1
  b (inc a)
  ...)

=> {:a 1 :b 2}

namespace: let-map2

let-map2 should be preferred because the syntax is closer to let. It also adds additional features: namespaced keywords and value filtering (particularly nils)

(require '[dsann.let-map2 :refer [let-map])

(let-map
  [a 1
   b (inc a)
   ...])

=> {:a 1 :b 2}

refer to dsann.let-map2-test for examples

Deps

io.github.davesann/let-map {:git/tag "v9" :git/sha "d0f023e"}

if you want to list all versions

git show-ref --tags --abbrev

Supported dialects

• clj
• cljs
• bb

Features

• Names that start _ are removed from the final map
  • Useful for intermediate values
• Destructuring works
• Refer to tests for examples: let-map tests
• since v8:
  • The input map type will be retained when using assoc versions
  • If you want to let-map a specific map type then (let-assoc (my-map-type) a 1 ...)

Variants in namespace: let-map

• let-assoc:
  • like let-map but add to a provided map
• sym-map:
  • create a map from a list of symbols. Keys will be the symbol names
• assoc-syms
  • like sym-map but add to a provided map

Variants in namespace: let-map2

• let-assoc:
  • like let-map but add to a provided map
• sym-map:
  • create a map from a list of symbols. Keys will be the symbol names
• assoc-syms
  • like sym-map but add to a provided map

namespaced keywords

all variants that end in -ns create namespaced keywords

• let-map-ns
• let-assoc-ns
• sym-map-ns
• assoc-syms-ns

value filtering variants

all variants that end in a '-' filter based on values. the default is to filter nils.

• let-map-

• let-assoc-

• sym-map-

• assoc-syms-

• let-map-ns-

• let-assoc-ns-

• sym-map-ns-

• assoc-syms-ns-

Examples

See namespaces:

• dsann.let-map-test
• dsann.let-map2-test

Other

clj-kondo

if using clj-kondo and you are seeing unresolved-symbol errors

1. Ensure there is a .clj-kondo directory in your project
2. Then run the following command to copy configs to exclude these errors

clj-kondo --lint "$(clojure -Spath)" --copy-configs --skip-lint