Keen eyes
Steven D'Aprano
steve at pearwood.info
Sun Jan 17 02:10:09 EST 2016
On Sun, 17 Jan 2016 10:25 am, jonas.thornvall at gmail.com wrote:
> double use of j in two different functions
Are you using a global variable called "j" as a loop variable? That sounds
like a terrible idea.
You should use local variables. Then a function with a local variable j
cannot possibly effect another function with a local variable also called
j.
Wait... is somebody going to tell me that Javascript defaults to global
variables inside functions?
js> function a(){
> for (j=2;j<10;j++){}
> return 1
> }
js> function b(){
> for (j=2; j<20;j++){}
> return 1
> }
js> j
js: "<stdin>", line 13: uncaught JavaScript runtime exception:
ReferenceError: "j" is not defined.
at <stdin>:13
js> a()
1
js> j
10
js> b()
1
js> j
20
And this is the language that 95% of the Internet uses... my brain hurts.
--
Steven
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