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10 changes: 9 additions & 1 deletion src/Core__Array.mjs
Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,13 @@ function reduceRightWithIndex(arr, init, f) {
return arr.reduceRight(f, init);
}

function get(arr, i) {
if (i >= 0 && i < arr.length) {
return Caml_option.some(arr[i]);
}

}

function findIndexOpt(array, finder) {
var index = array.findIndex(finder);
if (index !== -1) {
Expand Down Expand Up @@ -166,7 +173,7 @@ function findMap(arr, f) {
}

function last(a) {
return a[a.length - 1 | 0];
return get(a, a.length - 1 | 0);
}

export {
Expand All @@ -180,6 +187,7 @@ export {
reduceWithIndex ,
reduceRight ,
reduceRightWithIndex ,
get ,
findIndexOpt ,
filterMap ,
keepSome ,
Expand Down
8 changes: 7 additions & 1 deletion src/Core__Array.res
Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,13 @@ let reduceRightWithIndex = (arr, init, f) => reduceRightWithIndex(arr, f, init)
@send external some: (array<'a>, 'a => bool) => bool = "some"
@send external someWithIndex: (array<'a>, ('a, int) => bool) => bool = "some"

@get_index external get: (array<'a>, int) => option<'a> = ""
let get = (arr, i) =>
if i >= 0 && i < length(arr) {
Some(getUnsafe(arr, i))
} else {
None
}

@set_index external set: (array<'a>, int, 'a) => unit = ""

@get_index external getSymbol: (array<'a>, Core__Symbol.t) => option<'b> = ""
Expand Down
3 changes: 1 addition & 2 deletions src/Core__Array.resi
Original file line number Diff line number Diff line change
Expand Up @@ -822,8 +822,7 @@ array->Array.get(0) == Some("Hello") // true
array->Array.get(3) == None // true
```
*/
@get_index
external get: (array<'a>, int) => option<'a> = ""
let get: (array<'a>, int) => option<'a>

/**
`set(array, index, item)` sets the provided `item` at `index` of `array`.
Expand Down