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A question about a challenge question

var a = { atr:12 }; var b = 37; function change(obj,x){ x++; a.atr++; } change(a,b); console.log(a.atr + "" + b); I couldn't understand why a.atr is not 38. Because when I do try to increment the object a within a function, the property inside the object a increases properly. Could you tell me the reason behind that? Thanks

22nd Sep 2018, 8:04 PM
Yusuf
Yusuf - avatar
10 ответов
+ 3
//well... Its logic var a { atr:12 }; //global variable var b=37; //also global function change(obj,x){ x++; //x is a local variable and has no influence at anything a.atr++;//increasing atr of a from 12 to 13 } change(a,b); //making x inside the function have the value of b, wont help x influence b because they dont say b++ console.log(a.atr+""+b); //output 1337 13 from a.atr and 37 from b since it is not changed
22nd Sep 2018, 9:30 PM
~Just Another Brick In The Wall~
~Just Another Brick In The Wall~ - avatar
+ 7
~Just Another Brick In The Wall~ I just figured this out: you can put ; as many as you want int x=5;;;;;;;;;;; and it works 😁 (works in java, probably works in other languages)
22nd Sep 2018, 10:59 PM
voja
voja - avatar
+ 6
var a{ atr:12 }; why would you put ; after { ? Isn't that unnecessary or maybe there's a reason?
22nd Sep 2018, 10:53 PM
voja
voja - avatar
+ 2
it's unneccessary but in this case used to confuse people with the values of a and a.atr
22nd Sep 2018, 10:55 PM
~Just Another Brick In The Wall~
~Just Another Brick In The Wall~ - avatar
+ 1
I think I am confused a bit about the value of variable and property. a.atr can't be 38. It is 12. It can be 13. 😂 Thank you ~Just Another Brick In The Wall~
22nd Sep 2018, 10:30 PM
Yusuf
Yusuf - avatar
+ 1
Joseph Hardrock I think this question is ment to let you be confused with variables, their names, values, and how the last ones are changed
22nd Sep 2018, 10:31 PM
~Just Another Brick In The Wall~
~Just Another Brick In The Wall~ - avatar
+ 1
Voja lol but I didn't read your question correct I thought you asked why they put curly brackets and atr inside it
22nd Sep 2018, 11:50 PM
~Just Another Brick In The Wall~
~Just Another Brick In The Wall~ - avatar
+ 1
btw a semicolon remembers a program that it is the end of the statement line so what you are saying to the program is int x = 5 //New codeline //New codeline //New codeline //New codeline //New codelin etc .....
22nd Sep 2018, 11:52 PM
~Just Another Brick In The Wall~
~Just Another Brick In The Wall~ - avatar
+ 1
Maybe the confusion was generated by the differences between languages? In Python you can define some container object like arr = [] and throw stuff in there with arr.append(x) even from a function, while you can't reassign (arr = 'whatever').
23rd Sep 2018, 6:04 AM
HonFu
HonFu - avatar
+ 1
In javascript you can also define a container object like var arr = [] and arr.push() and way more, but there is a difference here. A has (I think) the value { atr:12 } if you alert or console.log it, but if you alert or console.log an array, it will output just values separated with commas, even when you stack arrays like arr = [a [ b ] [e [ c ] [ d ] ] ] but if I alert arr[2], even though there are other values stored in it, it will output e but when I alert a.atr, it can have other values and maybe even another container like that so you can do a.atr.anotheratr.anotherthirdatr etc. and store huge amounts of values
23rd Sep 2018, 6:11 AM
~Just Another Brick In The Wall~
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