Method sortIndex

src/danfojs-base/core/frame.ts:3059–3091

(options?:
        {
            inplace?: boolean
            ascending?: boolean
        }
    )

        }
    ): DataFrame
    sortIndex(options?:
        {
            inplace?: boolean
            ascending?: boolean
        }
    ): DataFrame | void {
        const { ascending, inplace } = { ascending: true, inplace: false, ...options }

        const indexPosition = utils.range(0, this.index.length - 1)
        const index = [...this.index]

        const objToSort = index.map((idx, i) => {
            return { index: indexPosition[i], value: idx }
        })

        const sortedObjectArr = utils.sortObj(objToSort, ascending)
        let sortedIndex = sortedObjectArr.map((obj) => obj.index);
        const newData = sortedIndex.map(i => (this.values as ArrayType2D)[i as number])
        sortedIndex = sortedIndex.map((i) => index[i as number]);

        if (inplace) {
            this.$setValues(newData)
            this.$setIndex(sortedIndex)
        } else {
            return new DataFrame(newData, {
                index: sortedIndex,
                columns: [...this.columns],
                dtypes: [...this.dtypes],
                config: { ...this.config }
            })
        }

    }

    /**
     * Add new rows at the end of the DataFrame.