Method dropNa

src/danfojs-base/core/series.ts:1590–1616

(options?: { inplace?: boolean })

    */
    dropNa(options?: { inplace?: boolean }): Series
    dropNa(options?: { inplace?: boolean }): Series | void {
        const { inplace } = { inplace: false, ...options }

        const oldValues = this.values;
        const oldIndex = this.index;
        const newValues: ArrayType1D = [];
        const newIndex: Array<string | number> = [];
        const isNaVals = this.isNa().values;

        isNaVals.forEach((val, i) => {
            if (!val) {
                newValues.push((oldValues as ArrayType1D)[i]);
                newIndex.push(oldIndex[i])
            }
        });

        if (inplace) {
            this.$setValues(newValues, false)
            this.$setIndex(newIndex)
        } else {
            const sf = this.copy();
            sf.$setValues(newValues, false)
            sf.$setIndex(newIndex)
            return sf;
        }

    }

    /**
     * Returns the integer indices that would sort the Series.