iteragain/dist/esm/unique.js

Javascript Iterable/Iterator/Generator-function utilities.

import toIterator from './toIterator';
import FilterIterator from './internal/FilterIterator';
export function unique(...args) {
    var _a;
    if (typeof args[0] === 'function' || !args.length)
        return it => unique(it, args[0]);
    const it = toIterator(args[0]);
    args[1] = (_a = args[1]) !== null && _a !== void 0 ? _a : ((v) => v);
    const { iteratee = (v) => v, justSeen = false } = typeof args[1] === 'function' ? { iteratee: args[1] } : args[1];
    if (justSeen) {
        let lastValue;
        return new FilterIterator(it, value => {
            value = iteratee(value);
            if (!lastValue || value !== lastValue) {
                lastValue = value;
                return true;
            }
            return false;
        });
    }
    const seen = new Set();
    return new FilterIterator(it, value => {
        value = iteratee(value);
        if (!seen.has(value)) {
            seen.add(value);
            return true;
        }
        return false;
    });
}
export default unique;
//# sourceMappingURL=unique.js.map