Method _historyTableForget

src/AutoNumeric.js:1801–1818

* Make the history table forget its first N elements, shifting its indexes in the process. * `N` being given as the `numberOfEntriesToForget` parameter. * * @param {Number} [numberOfEntriesToForget=1] (Optional, default: 1) * @returns {HistoryTableEntry|Array }

(numberOfEntriesToForget = 1)

     * @private
     */
    _historyTableForget(numberOfEntriesToForget = 1) {
        const shiftedAway = [];
        for (let i = 0; i < numberOfEntriesToForget; i++) {
            shiftedAway.push(this.historyTable.shift());
            // Update the history table index accordingly
            this.historyTableIndex--;
            if (this.historyTableIndex < 0) {
                // In case this function is called more times than there is states in the history table
                this.historyTableIndex = 0;
            }
        }

        if (shiftedAway.length === 1) {
            return shiftedAway[0];
        }

        return shiftedAway;
    }

    /**
     * Return the currently used value from the history table.