clj-fast.clojure.core — bsless/clj-fast 0.0.9

assoc clj

(assoc map key val)

(assoc map key val & kvs)

assoc[iate]. When applied to a map, returns a new map of the same (hashed/sorted) type, that contains the mapping of key(s) to val(s). When applied to a vector, returns a new vector that contains val at index. Note - index must be <= (count vector).

assoc-in clj

(assoc-in m [k & ks] v)

Associates a value in a nested associative structure, where ks is a sequence of keys and v is the new value and returns a new nested structure. If any levels do not exist, hash-maps will be created.

defn clj macro

(defn name doc-string? attr-map? [params*] prepost-map? body)

(defn name doc-string? attr-map? ([params*] prepost-map? body) + attr-map?)

Same as (def name (fn [params* ] exprs*)) or (def name (fn ([params* ] exprs*)+)) with any doc-string or attrs added to the var metadata. prepost-map defines a map with optional keys :pre and :post that contain collections of pre or post conditions.

defn- clj macro

(defn- name & decls)

same as defn, yielding non-public def

destructure clj

(destructure bindings)

fn clj macro

(fn & sigs)

params => positional-params* , or positional-params* & next-param positional-param => binding-form next-param => binding-form name => symbol

Defines a function

get clj

(get map key)

(get map key not-found)

Returns the value mapped to key, not-found or nil if key not present.

get-in clj

(get-in m ks)

(get-in m ks not-found)

Returns the value in a nested associative structure, where ks is a sequence of keys. Returns nil if the key is not present, or the not-found value if supplied.

let clj macro

(let bindings & body)

binding => binding-form init-expr

Evaluates the exprs in a lexical context in which the symbols in the binding-forms are bound to their respective init-exprs or parts therein.

loop clj macro

(loop bindings & body)

Evaluates the exprs in a lexical context in which the symbols in the binding-forms are bound to their respective init-exprs or parts therein. Acts as a recur target.

merge clj

(merge & maps)

Returns a map that consists of the rest of the maps conj-ed onto the first. If a key occurs in more than one map, the mapping from the latter (left-to-right) will be the mapping in the result.

nth clj

(nth coll index)

(nth coll index not-found)

Returns the value at the index. get returns nil if index out of bounds, nth throws an exception unless not-found is supplied. nth also works for strings, Java arrays, regex Matchers and Lists, and, in O(n) time, for sequences.

select-keys clj

(select-keys map keyseq)

Returns a map containing all the values of the selected keys when a resolvable sequence is supplied, otherwise, a containing only those entries in map whose key is in keys

update-in clj

(update-in m ks f & args)

'Updates' a value in a nested associative structure, where ks is a sequence of keys and f is a function that will take the old value and any supplied args and return the new value, and returns a new nested structure. If any levels do not exist, hash-maps will be created.