Method fillNa

src/danfojs-base/core/series.ts:786–811

(value: number | string | boolean, options?: { inplace?: boolean })

    */
    fillNa(value: number | string | boolean, options?: { inplace?: boolean }): Series
    fillNa(value: number | string | boolean, options?: { inplace?: boolean }): Series | void {
        const { inplace } = { inplace: false, ...options }

        if (!value && typeof value !== "boolean" && typeof value !== "number") {
            throw Error('ParamError: value must be specified');
        }

        const newValues: ArrayType1D = [];
        (this.values as ArrayType1D).forEach((val) => {
            if (utils.isEmpty(val)) {
                newValues.push(value);
            } else {
                newValues.push(val);
            }
        });

        if (inplace) {
            this.$setValues(newValues)
        } else {
            return utils.createNdframeFromNewDataWithOldProps({
                ndFrame: this,
                newData: newValues,
                isSeries: true
            }) as Series
        }
    }


    /**