// ♓🌟 Piscēs ∷ collection.js
// ====================================================================
//
-// Copyright © 2020–2022 Lady [@ Lady’s Computer].
+// Copyright © 2020–2023 Lady [@ Lady’s Computer].
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
} from "./numeric.js";
import { sameValue, type } from "./value.js";
+const { prototype: arrayPrototype } = Array;
+
export const {
/** Returns an array of the provided values. */
of: array,
} = Array;
/**
- * Returns -0 if the provided argument is "-0"; returns a number
+ * Returns −0 if the provided argument is "-0"; returns a number
* representing the index if the provided argument is a canonical
* numeric index string; otherwise, returns undefined.
*
* There is no clamping of the numeric index, but note that numbers
- * above 2^53 − 1 are not safe nor valid integer indices.
+ * above 2^53 − 1 are not safe nor valid integer indices.
*/
export const canonicalNumericIndexString = ($) => {
if (typeof $ !== "string") {
};
/**
- * Returns the result of catenating the provided arraylikes, returning
- * a new collection according to the algorithm of Array::concat.
+ * Returns the result of catenating the provided arraylikes into a new
+ * collection according to the algorithm of `Array::concat`.
*/
-export const catenate = makeCallable(Array.prototype.concat);
+export const catenate = makeCallable(arrayPrototype.concat);
/**
* Copies the items in the provided object to a new location according
- * to the algorithm of Array::copyWithin.
+ * to the algorithm of `Array::copyWithin`.
*/
-export const copyWithin = makeCallable(Array.prototype.copyWithin);
+export const copyWithin = makeCallable(arrayPrototype.copyWithin);
/**
- * Fills the provided object with the provided value using the
- * algorithm of Array::fill.
+ * Fills the provided object with the provided value according to the
+ * algorithm of `Array::fill`.
*/
-export const fill = makeCallable(Array.prototype.fill);
+export const fill = makeCallable(arrayPrototype.fill);
/**
* Returns the result of filtering the provided object with the
- * provided callback, using the algorithm of Array::filter.
+ * provided callback, according to the algorithm of `Array::filter`.
*/
-export const filter = makeCallable(Array.prototype.filter);
+export const filter = makeCallable(arrayPrototype.filter);
/**
* Returns the first index in the provided object whose value satisfies
- * the provided callback using the algorithm of Array::findIndex.
+ * the provided callback according to the algorithm of
+ * `Array::findIndex`.
*/
-export const findIndex = makeCallable(Array.prototype.findIndex);
+export const findIndex = makeCallable(arrayPrototype.findIndex);
/**
* Returns the first indexed entry in the provided object whose value
/**
* Returns the first indexed value in the provided object which
- * satisfies the provided callback, using the algorithm of Array::find.
+ * satisfies the provided callback, according to the algorithm of
+ * `Array::find`.
*/
-export const findItem = makeCallable(Array.prototype.find);
+export const findItem = makeCallable(arrayPrototype.find);
/**
* Returns the result of flatmapping the provided value with the
- * provided callback using the algorithm of Array::flatMap.
+ * provided callback according to the algorithm of `Array::flatMap`.
*/
-export const flatmap = makeCallable(Array.prototype.flatMap);
+export const flatmap = makeCallable(arrayPrototype.flatMap);
/**
- * Returns the result of flattening the provided object using the
- * algorithm of Array::flat.
+ * Returns the result of flattening the provided object according to
+ * the algorithm of `Array::flat`.
*/
-export const flatten = makeCallable(Array.prototype.flat);
+export const flatten = makeCallable(arrayPrototype.flat);
/**
* Returns the first index of the provided object with a value
* equivalent to the provided value according to the algorithm of
- * Array::indexOf.
+ * `Array::indexOf`.
*/
-export const getFirstIndex = makeCallable(Array.prototype.indexOf);
+export const getFirstIndex = makeCallable(arrayPrototype.indexOf);
/**
- * Returns the item on the provided object at the provided index using
- * the algorithm of Array::at.
+ * Returns the item on the provided object at the provided index
+ * according to the algorithm of `Array::at`.
*/
-export const getItem = makeCallable(Array.prototype.at);
+export const getItem = makeCallable(arrayPrototype.at);
/**
* Returns the last index of the provided object with a value
* equivalent to the provided value according to the algorithm of
- * Array::lastIndexOf.
+ * `Array::lastIndexOf`.
*/
-export const getLastIndex = makeCallable(Array.prototype.lastIndexOf);
+export const getLastIndex = makeCallable(arrayPrototype.lastIndexOf);
/**
* Returns whether every indexed value in the provided object satisfies
- * the provided function, using the algorithm of Array::every.
+ * the provided function, according to the algorithm of `Array::every`.
*/
-export const hasEvery = makeCallable(Array.prototype.every);
+export const hasEvery = makeCallable(arrayPrototype.every);
/**
* Returns whether the provided object has an indexed value which
- * satisfies the provided function, using the algorithm of Array::some.
+ * satisfies the provided function, according to the algorithm of
+ * `Array::some`.
*/
-export const hasSome = makeCallable(Array.prototype.some);
+export const hasSome = makeCallable(arrayPrototype.some);
/**
* Returns whether the provided object has an indexed value equivalent
- * to the provided value according to the algorithm of Array::includes.
+ * to the provided value according to the algorithm of
+ * `Array::includes`.
*
- * > ☡ This algorithm treats missing values as `undefined` rather than
- * > skipping them.
+ * ※ This algorithm treats missing values as `undefined` rather than
+ * skipping them.
*/
-export const includes = makeCallable(Array.prototype.includes);
+export const includes = makeCallable(arrayPrototype.includes);
/**
* Returns an iterator over the indexed entries in the provided value
- * according to the algorithm of Array::entries.
+ * according to the algorithm of `Array::entries`.
*/
-export const indexedEntries = makeCallable(Array.prototype.entries);
+export const indexedEntries = makeCallable(arrayPrototype.entries);
/**
* Returns an iterator over the indices in the provided value according
- * to the algorithm of Array::keys.
+ * to the algorithm of `Array::keys`.
*/
-export const indices = makeCallable(Array.prototype.keys);
+export const indices = makeCallable(arrayPrototype.keys);
/** Returns whether the provided value is an array index string. */
export const isArrayIndexString = ($) => {
}
};
+/** Returns whether the provided value is arraylike. */
+export const isArraylikeObject = ($) => {
+ if (type($) !== "object") {
+ return false;
+ } else {
+ try {
+ lengthOfArraylike($); // throws if not arraylike
+ return true;
+ } catch {
+ return false;
+ }
+ }
+};
+
/**
* Returns whether the provided object is a collection.
*
* The definition of “collection” used by Piscēs is similar to
* Ecmascript’s definition of an arraylike object, but it differs in
- * a few ways :—
+ * a few ways :—
*
* - It requires the provided value to be a proper object.
*
* - It requires the `length` property to be an integer index.
*
* - It requires the object to be concat‐spreadable, meaning it must
- * either be an array or have `[Symbol.isConcatSpreadable]` be true.
+ * either be an array or have `.[Symbol.isConcatSpreadable]` be true.
*/
export const isCollection = ($) => {
if (!(type($) === "object" && "length" in $)) {
/**
* Returns an iterator over the items in the provided value according
- * to the algorithm of Array::values.
+ * to the algorithm of `Array::values`.
*/
-export const items = makeCallable(Array.prototype.values);
+export const items = makeCallable(arrayPrototype.values);
/**
* Returns the length of the provided arraylike object.
* This can produce larger lengths than can actually be stored in
* arrays, because no such restrictions exist on arraylike methods.
*/
-export const lengthOfArrayLike = ({ length }) => toLength(length);
+export const lengthOfArraylike = ({ length }) => toLength(length);
/**
* Returns the result of mapping the provided value with the provided
- * callback using the algorithm of Array::map.
+ * callback according to the algorithm of `Array::map`.
*/
-export const map = makeCallable(Array.prototype.map);
+export const map = makeCallable(arrayPrototype.map);
-/** Pops from the provided value using the algorithm of Array::pop. */
-export const pop = makeCallable(Array.prototype.pop);
+/**
+ * Pops from the provided value according to the algorithm of
+ * `Array::pop`.
+ */
+export const pop = makeCallable(arrayPrototype.pop);
/**
- * Pushes onto the provided value using the algorithm of Array::push.
+ * Pushes onto the provided value according to the algorithm of
+ * `Array::push`.
*/
-export const push = makeCallable(Array.prototype.push);
+export const push = makeCallable(arrayPrototype.push);
/**
* Returns the result of reducing the provided value with the provided
- * callback, using the algorithm of Array::reduce.
+ * callback, according to the algorithm of `Array::reduce`.
*/
-export const reduce = makeCallable(Array.prototype.reduce);
+export const reduce = makeCallable(arrayPrototype.reduce);
/**
- * Reverses the provided value using the algorithm of Array::reverse.
+ * Reverses the provided value according to the algorithm of
+ * `Array::reverse`.
*/
-export const reverse = makeCallable(Array.prototype.reverse);
+export const reverse = makeCallable(arrayPrototype.reverse);
-/** Shifts the provided value using the algorithm of Array::shift. */
-export const shift = makeCallable(Array.prototype.shift);
+/**
+ * Shifts the provided value according to the algorithm of
+ * `Array::shift`.
+ */
+export const shift = makeCallable(arrayPrototype.shift);
/**
- * Returns a slice of the provided value using the algorithm of
- * Array::slice.
+ * Returns a slice of the provided value according to the algorithm of
+ * `Array::slice`.
*/
-export const slice = makeCallable(Array.prototype.slice);
+export const slice = makeCallable(arrayPrototype.slice);
/**
- * Sorts the provided value in‐place using the algorithm of
- * Array::sort.
+ * Sorts the provided value in‐place according to the algorithm of
+ * `Array::sort`.
*/
-export const sort = makeCallable(Array.prototype.sort);
+export const sort = makeCallable(arrayPrototype.sort);
/**
- * Splices into and out of the provided value using the algorithm of
- * Array::splice.
+ * Splices into and out of the provided value according to the
+ * algorithm of `Array::splice`.
*/
-export const splice = makeCallable(Array.prototype.splice);
+export const splice = makeCallable(arrayPrototype.splice);
/**
* Returns the result of converting the provided value to an array
};
/**
- * Unshifts the provided value using the algorithm of Array::unshift.
+ * Unshifts the provided value according to the algorithm of
+ * `Array::unshift`.
*/
-export const unshift = makeCallable(Array.prototype.unshift);
+export const unshift = makeCallable(arrayPrototype.unshift);
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