Access class method from .map function in ReactJS [duplicate]

I have the following ReactJS file:

import React, { Component } from "react";
import Topic from "./Topic";
import $ from "jquery";

import { library } from '@fortawesome/fontawesome-svg-core'
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
import { faTrash, faEye } from '@fortawesome/free-solid-svg-icons'

library.add(faTrash, faEye);

class MainTopic extends Component {
    constructor() {
        super();
        this.state = { matter: [] };
    }
    componentDidMount(){
        $.ajax({
            url: "/api/all",
            dataType: "json",
            success: function (dados) {
                this.setState({matter:dados});
            }.bind(this)
        });
    }
    onDelete(dado){
        console.log(dado._id);
    }

    onEdit(dado){
        console.log(dado._id);
    };
    render() {
        const dados = this.state.matter;

        return (
            dados.map(function (dado) {
                let progressBarValues = {
                    width: dado.percentage_concluded
                };
                return (
                    <div key={dado._id} className="card mb-3">
                        <div className="card-header">
                            <span className="btn btn-light float-lg-right" onClick={() => this.onDelete(dado)}><FontAwesomeIcon icon="trash" /></span><span className="btn btn-light float-lg-right" onClick={(dado) => this.onEdit(dado)}><FontAwesomeIcon icon="eye" /></span>
                            <h4 className="card-title" ><a className="btn btn-dark" data-toggle="collapse" href={"#collapse-"+dado._id} role="button" aria-expanded="false" aria-controls={"collapse-"+dado._id}>{dado.title}</a></h4>
                            <div className="progress">
                                <div className="progress-bar" role="progressbar" style={progressBarValues} aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
                            </div>
                        </div>
                        <div className="card-body collapse" id={"collapse-"+dado._id}>
                            <Topic topic={dado.topics} />
                        </div>
                    </div>
                );
            })
        );
    }

}

export default MainTopic;

The error I am facing is when I have to click on the DELETE and VIEW buttons. It just gives me the following error: TypeError: Cannot read property 'onDelete' of undefined

I tried to bind the functions to this, but it throws me an error before rendering the view.

The question is how to access the method within the .map function.

Thank you in advance.