sample.toJSON() broke in 1.0.5

Describe the bug sample.toJSON() broke in 1.0.5 looks like the frame returned by df.sample() is from base - src/danfojs-base/core/frame.ts and not from the node one.

To Reproduce Steps to reproduce the behavior:

// install 1.0.5
import {DataFrame} from 'danfojs-node'

const df = new DataFrame([{a: 1}, {b: 2}])
console.log(df.toJSON())
const sample = await df.sample(1)
console.log(sample.toJSON())

Expected behavior sample.toJSON() should return

[ { a: 1 } ]

Screenshots

Desktop (please complete the following information):

• OS: MacOS 11.5.2 M1 2020
• Browser: Node v17.7.2
• Version v17.7.2

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[odjhey]

hi @risenW, super thanks! I wouldve sent a PR for a fix but my powers was not enough hehe. BTW! Thanks for working on danfojs, really helping our small team big time! 😃 We’ll find ways to contribute better in the future! Again, super thanks ".)👍🏼

[odjhey]

hmm, after some digging, i think any method that returns the base version of DataFrame like (sample, head, add, etc) will not include the io functions defined in node-df/browser-df. Functions include toCSV, toJSON, toExcel

im directly using the exported toJSON for now (below example)

import {DataFrame, toJSON} from 'danfojs-node'

const df = new DataFrame([{a: 1}, {b: 2}])
console.log(df.toJSON())
const sample = await df.sample(1)

// console.log(sample.toJSON()) // <--- replace baseDf.toJSON() with the one from import {toJSON} from 'danfojs-node'
console.log(toJSON(sample))