Array.prototype code at 1:23

#1

i am having a problem at the output of this code as i go live then there are some lines at the console

join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]

when i intitalize the code it shows always same

here is the code :

Array.prototype.joinOriginal = Array.prototype.join
Array.prototype.join = function () {
console.log(‘join called on’, this)
return this.joinOriginal(…arguments)
}

#2

This code is not running, what’s the result you are trying to achieve, and what error you are facing? Please explain briefly

#3

see here in this code we create a new function for name join and copying the original join into join original that means when i use join then is must work as a we declared the function but when i run it it works fine but it only throws these lines at the console:

join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]
app.js:15
join called on (7) [‘fa’, ‘fab’, ‘fas’, ‘far’, ‘fal’, ‘fad’, ‘fak’]

i copied the same code as from the video but it shows the same

#4

So that is correct output because you are logging console.log(‘join called on’, this) where “this” is the array

#5

but in the lecture video there’s nothing like this output

#6

Can you give me exact time at which point in video this is happening

#7

this code starts at 1:20:30 in lecture 7

#8

What is the array you are declaring?
Because this code is running perfectly:
Array.prototype.joinOriginal = Array.prototype.join
Array.prototype.join = function () {
console.log(‘join called on’, this)
return this.joinOriginal(…arguments)
}

let l = [12,12,23,4,4,43]
l.join(’,’)

Please make sure that you are not calling join in a for loop