module.exports = {
post: (title, body, autor) => {
this.title = title
this.body = body
this.autor = autor
},
search: function(search, arr , call){
var result = arr.find(a => a.title == search)
call(null, result)
}
}I have this code when I execute it tells me "can not read property find of undefined", before I tried it out of module.exports. I've searched it in google and here and I can not find the error. thank you, thanks
Clearly the problem is that arr is undefined , to correct the error you must add a verification as typeof arr == 'undefined' and consider the case or refer you to the caller and do the verification there to ensure that the method does not fail.
module.exports = {
post: (title, body, autor) => {
this.title = title
this.body = body
this.autor = autor
},
search: function(search, arr , call){
// ok va a indicar si arr está definido y si arr.find es una función.
var ok = typeof arr != 'undefined' &&
typeof arr.find == 'function';
var result = ok ? arr.find(a => a.title == search) : false;
call(null, result)
}
}In practice, you could add a condition and tell the programmer that something is wrong.