Map.String

key

RES
type key = string

t

RES
type t<'value>

The type of maps from type key to type 'value.

empty

let empty: t<'v>

isEmpty

let isEmpty: t<'v> => bool

has

let has: (t<'v>, key) => bool

cmpU

let cmpU: (t<'v>, t<'v>, (. 'v, 'v) => int) => int

cmp

let cmp: (t<'v>, t<'v>, ('v, 'v) => int) => int

eqU

let eqU: (t<'v>, t<'v>, (. 'v, 'v) => bool) => bool

eq

let eq: (t<'v>, t<'v>, ('v, 'v) => bool) => bool

eq(m1, m2) tests whether the maps m1 and m2 are equal, that is, contain equal keys and associate them with equal data.

findFirstByU

let findFirstByU: (t<'v>, (. key, 'v) => bool) => option<(key, 'v)>

findFirstBy

let findFirstBy: (t<'v>, (key, 'v) => bool) => option<(key, 'v)>

findFirstBy(m, p) uses function f to find the first key value pair to match predicate p.

RES
let s0 = Belt.Map.String.fromArray([("4", 4), ("1", 1), ("2", 2), ("3", 3)])

Belt.Map.String.findFirstBy(s0, (k, _) => k == "4") == Some(("4", 4))

forEachU

let forEachU: (t<'v>, (. key, 'v) => unit) => unit

forEach

let forEach: (t<'v>, (key, 'v) => unit) => unit

forEach(m, f) applies f to all bindings in map m. f receives the key as first argument, and the associated value as second argument. The bindings are passed to f in increasing order with respect to the ordering over the type of the keys.

reduceU

let reduceU: (t<'v>, 'v2, (. 'v2, key, 'v) => 'v2) => 'v2

reduce

let reduce: (t<'v>, 'v2, ('v2, key, 'v) => 'v2) => 'v2

reduce(m, a, f) computes f(kN, dN ... f(k1, d1, a)...), where k1 ... kN) are the keys of all bindings in m (in increasing order), and d1 ... dN are the associated data.

everyU

let everyU: (t<'v>, (. key, 'v) => bool) => bool

every

let every: (t<'v>, (key, 'v) => bool) => bool

every(m, p) checks if all the bindings of the map satisfy the predicate p. Order unspecified

someU

let someU: (t<'v>, (. key, 'v) => bool) => bool

some

let some: (t<'v>, (key, 'v) => bool) => bool

some(m, p) checks if at least one binding of the map satisfy the predicate p. Order unspecified

size

let size: t<'v> => int

toList

let toList: t<'v> => list<(key, 'v)>

In increasing order.

toArray

let toArray: t<'v> => array<(key, 'v)>

fromArray

let fromArray: array<(key, 'v)> => t<'v>

keysToArray

let keysToArray: t<'v> => array<key>

valuesToArray

let valuesToArray: t<'v> => array<'v>

minKey

let minKey: t<'a> => option<key>

minKeyUndefined

let minKeyUndefined: t<'a> => Js.undefined<key>

maxKey

let maxKey: t<'a> => option<key>

maxKeyUndefined

let maxKeyUndefined: t<'a> => Js.undefined<key>

minimum

let minimum: t<'v> => option<(key, 'v)>

minUndefined

let minUndefined: t<'v> => Js.undefined<(key, 'v)>

maximum

let maximum: t<'v> => option<(key, 'v)>

maxUndefined

let maxUndefined: t<'v> => Js.undefined<(key, 'v)>

get

let get: (t<'v>, key) => option<'v>

getUndefined

let getUndefined: (t<'v>, key) => Js.undefined<'v>

getWithDefault

let getWithDefault: (t<'v>, key, 'v) => 'v

getExn

let getExn: (t<'v>, key) => 'v

checkInvariantInternal

let checkInvariantInternal: t<'a> => unit

raise when invariant is not held

remove

let remove: (t<'v>, key) => t<'v>

remove(m, x) returns a map containing the same bindings as m, except for x which is unbound in the returned map.

removeMany

let removeMany: (t<'v>, array<key>) => t<'v>

set

let set: (t<'v>, key, 'v) => t<'v>

set(m, x, y) returns a map containing the same bindings as m, plus a binding of x to y. If x was already bound in m, its previous binding disappears.

updateU

let updateU: (t<'v>, key, (. option<'v>) => option<'v>) => t<'v>

update

let update: (t<'v>, key, option<'v> => option<'v>) => t<'v>

mergeU

let mergeU: (t<'v>, t<'v2>, (. key, option<'v>, option<'v2>) => option<'c>) => t<'c>

merge

let merge: (t<'v>, t<'v2>, (key, option<'v>, option<'v2>) => option<'c>) => t<'c>

merge(m1, m2, f) computes a map whose keys is a subset of keys of m1 and of m2. The presence of each such binding, and the corresponding value, is determined with the function f.

mergeMany

let mergeMany: (t<'v>, array<(key, 'v)>) => t<'v>

keepU

let keepU: (t<'v>, (. key, 'v) => bool) => t<'v>

keep

let keep: (t<'v>, (key, 'v) => bool) => t<'v>

keep(m, p) returns the map with all the bindings in m that satisfy predicate p.

partitionU

let partitionU: (t<'v>, (. key, 'v) => bool) => (t<'v>, t<'v>)

partition

let partition: (t<'v>, (key, 'v) => bool) => (t<'v>, t<'v>)

partition(m, p) returns a pair of maps (m1, m2), where m1 contains all the bindings of s that satisfy the predicate p, and m2 is the map with all the bindings of s that do not satisfy p.

split

let split: (key, t<'v>) => (t<'v>, option<'v>, t<'v>)

split(x, m) returns a triple (l, data, r), where l is the map with all the bindings of m whose key is strictly less than x; r is the map with all the bindings of m whose key is strictly greater than x; data is None if m contains no binding for x, or Some(v) if m binds v to x.

mapU

let mapU: (t<'v>, (. 'v) => 'v2) => t<'v2>

map

let map: (t<'v>, 'v => 'v2) => t<'v2>

map(m, f) returns a map with same domain as m, where the associated value a of all bindings of m has been replaced by the result of the application of f to a. The bindings are passed to f in increasing order with respect to the ordering over the type of the keys.

mapWithKeyU

let mapWithKeyU: (t<'v>, (. key, 'v) => 'v2) => t<'v2>

mapWithKey

let mapWithKey: (t<'v>, (key, 'v) => 'v2) => t<'v2>