@thi.ng/transducers/symmetric.d.ts

Collection of ~170 lightweight, composable transducers, reducers, generators, iterators for functional data transformations

/**
 * Yields an iterator of all `src` values, followed by the same values in
 * reverse order. Efficiently builds the reversed order via an internal linked
 * list. The input MUST be finite!
 *
 * @remarks
 * Also see {@link palindrome}.
 *
 * @example
 * ```ts tangle:../export/symmetric.ts
 * import { symmetric } from "@thi.ng/transducers";
 *
 * console.log(
 *   [...symmetric("abc")]
 * );
 * // [ "a", "b", "c", "c", "b", "a" ]
 *
 * console.log(
 *   [...symmetric([1, 2, 3])]
 * );
 * // [ 1, 2, 3, 3, 2, 1 ]
 * ```
 *
 * @param src -
 */
export declare function symmetric<T>(src: Iterable<T>): IterableIterator<T>;
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