Symmetric Difference Free Code Camp Advanced Algorithm Scripting

Symmetric Difference Free Code Camp Advanced Algorithm Scripting
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[time]

Great tutorial, I was totally stuck and gave this watch and then was able to go back without looking and completed the challenge in about 10 minutes. The biggest points I was missing was slicing the arguments into an array and that the callback function could be referenced directly. I think it is clicking now after going back and reviewing the callback part of the Array.prototype.reduce() documentation. Reduce just keeps running the callback function for the current value and accumulating the values through the array and then returns the final accumulated value. I was stuck on a couple other challenges that have a similar concept that wasn't clicking, I think I can go back and conquer those now!

[MadpolygonDEV]

java script is absolute hell, went back and did it in c++

[egg]

I did for loops for both arr1 and arr2 and it worked as well

[JonathanDomah]

great tut Dylan. All I had to was sort() at the end.

[ThePolaris]

I went through the same early struggle with this problem as you did, as there are nuances in the challenge that I had not accounted for. This was definitely a challenging one that I was glad was over. I was able to figure it out on my own but thought I would see if you had a solution for this one and if it was much different than my own. As predicted it is a bit shorter than mine, but the method was pretty much the same.

[Lightning_Wolf]

Me: *laughs at him for misspelling "indexOf"*
Also me: *types "arr" instead of "arr1"*

[sherifkhattab]

Hi, , Thanks a lot.. that is 'so far' the shortest way for me to do it.
I have a question though..
Why do we have to creat the uniqueArray inside the helper function scope ? and when creating the uniqueArray in the parent sym function it doesn't give the desired return?
Please explain with live demo if possible..
I highly appreciate your help.

[dijitalness]

On line 4, if I use "args" instead of "arguments" it still works. Is there a difference?

[botsant]

I dont understand how your code (or any other solution to this problem for that matter) should pass the third test case. 5 is in all arguments, so why does it expect it in the solution?