stringzy/dist/transformations/removeDuplicates.js

A versatile string manipulation library providing a range of text utilities for JavaScript and Node.js applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.removeDuplicates = removeDuplicates;
/**
 * Removes duplicate words from a string, preserving the original word order.
 *
 * Splits the input string by spaces, filters out duplicate words,
 * and joins the unique words back into a string separated by spaces.
 *
 * Throws an error if the input is not a string.
 *
 * @param {string} text - The input string from which duplicate words will be removed.
 * @returns {string} A string containing only unique words in their original order.
 * @throws {TypeError} If the input is not a string.
 *
 * @example
 * removeDuplicates("hello world hello"); // "hello world"
 *
 * @example
 * removeDuplicates("this is is a test test"); // "this is a test"
 *
 * @example
 * removeDuplicates(""); // ""
 */
function removeDuplicates(text) {
    if (typeof text !== 'string') {
        throw new TypeError('Input must be a string');
    }
    const wordSet = new Set();
    text.split(' ').forEach((word) => {
        wordSet.add(word);
    });
    return Array.from(wordSet).join(' ');
}