Function $toJSON

src/danfojs-base/io/node/io.json.ts:163–214

(df: NDframe | DataFrame | Series, options?: JsonOutputOptionsNode)

 * ```
 */
const $toJSON = (df: NDframe | DataFrame | Series, options?: JsonOutputOptionsNode): object | void => {
    let { filePath, format } = { filePath: undefined, format: "column", ...options }

    if (df.$isSeries) {
        const obj: { [key: string]: ArrayType1D } = {};
        obj[df.columns[0]] = df.values as ArrayType1D;
        if (filePath) {
            if (!filePath.endsWith(".json")) {
                filePath = filePath + ".json"
            }
            fs.writeFileSync(filePath, JSON.stringify(obj))
        } else {
            return obj
        }
    } else {
        const values = df.values as ArrayType2D
        const header = df.columns
        const jsonArr: any = [];

        if (format === "row") {
            const obj: { [key: string]: ArrayType1D } = {};
            for (let i = 0; i < df.columns.length; i++) {
                obj[df.columns[i]] = (df as DataFrame).column(df.columns[i]).values as ArrayType1D;
            }
            if (filePath !== undefined) {
                if (!(filePath.endsWith(".json"))) {
                    filePath = filePath + ".json"
                }

                fs.writeFileSync(filePath, JSON.stringify(obj), "utf8")
            } else {
                return obj
            }
        } else {
            values.forEach((val) => {
                const obj: any = {};
                header.forEach((h, i) => {
                    obj[h] = val[i]
                });
                jsonArr.push(obj);
            });
            if (filePath) {
                if (!filePath.endsWith(".json")) {
                    filePath = filePath + ".json"
                }
                fs.writeFileSync(filePath, JSON.stringify(jsonArr))
            } else {
                return jsonArr
            }
        }
    }
};


export {