mobility-toolbox-js/common/utils/removeDuplicate.js

Toolbox for JavaScript applications in the domains of mobility and logistics.

/**
 * This function remove duplicates lower case string value of an array.
 * It removes also null, undefined or non string values.
 *
 * @param {array} array Array of values.
 * @private
 */
function removeDuplicate(array) {
    const arrWithoutEmptyValues = array.filter((val) => {
        var _a;
        return (_a = val === null || val === void 0 ? void 0 : val.trim) === null || _a === void 0 ? void 0 : _a.call(val);
    });
    const lowerCasesValues = arrWithoutEmptyValues.map((str) => {
        return str.toLowerCase();
    });
    const uniqueLowerCaseValues = [...new Set(lowerCasesValues)];
    const uniqueValues = uniqueLowerCaseValues.map((uniqueStr) => {
        return arrWithoutEmptyValues.find((str) => {
            return str.toLowerCase() === uniqueStr;
        });
    });
    return uniqueValues;
}
export default removeDuplicate;