the is_even package does not provide much worth indeed because it simply negates is_odd and thereby all its benefit.
It’s dependency is_odd on the other hand provides at least some additional checks (it also checks if the value is a valid integer below the max int value)
And while I would indeed see uses for such methods (especially with the other checks, no simple oneliners) in some cases, especially in testing: This is stuff you write yourself, throw it in a e.g. NumberUtils class and everything is fine. You do never depend on an external library for that. The benefit (not spending a few seconds to write it) does not outweigh any of the drawbacks that come with external libraries.
JS is a language where [1,2,11].sort() returns [1,11,2].
And if you use a variable instead of a bare array, half the functions are side-effectful, as determined by coin toss.
And if you try declaring that variable with new Array(3).map() then it will ignore all 3 indices, because undefined is real enough to be enumerated, but not real enough to be iterated, because, and I cannot overstress the importance of this principle in Javascript, go fuck yourself. Go fuck yourself is why.
Array(3) doesn’t create [undefined, undefined, undefined, ]; it creates [/* hole */, /* hole */, /* hole */, ]. The holes don’t set any property on the array whatsoever, so they are skipped when iterating. How this makes sense, I can’t tell you.
better to go that way than this (note the weekly downloads)
The best is the dependency on the function is_odd.
dear Lord lmfao
Which itself has a dependency of the function
is_number.I can’t
Can’t even or can’t odd? If only there was a way to find out =/
That is one deep rabbit hole.
300,000 every week… is this really a feature not built into Java Script?
the is_even package does not provide much worth indeed because it simply negates is_odd and thereby all its benefit.
It’s dependency is_odd on the other hand provides at least some additional checks (it also checks if the value is a valid integer below the max int value)
And while I would indeed see uses for such methods (especially with the other checks, no simple oneliners) in some cases, especially in testing: This is stuff you write yourself, throw it in a e.g. NumberUtils class and everything is fine. You do never depend on an external library for that. The benefit (not spending a few seconds to write it) does not outweigh any of the drawbacks that come with external libraries.
x % 2 == 0
If you forget for a second it’s Javascript, the language will turn back and bite you.
(+x) % 2 === 0
I am not good friends with js, what did I miss?
This evaluates to NaN for some reason:
Since JS doesn’t really differentiate strings from numbers, except on the places it does, it makes sense to make sure you are working with numbers.
Not a JS dev either but
===.Not really sure what the
(+x)is aboutthe remainder operator should return a number or a NaN right? do we actually need the triple here?
Not really. But with JS it’s better safe than sorry.
The GP’s addition is unnecessary, but I fully support anyone that decides to do it.
point taken!
JS is a language where
[1,2,11].sort()returns[1,11,2].And if you use a variable instead of a bare array, half the functions are side-effectful, as determined by coin toss.
And if you try declaring that variable with
new Array(3).map()then it will ignore all 3 indices, becauseundefinedis real enough to be enumerated, but not real enough to be iterated, because, and I cannot overstress the importance of this principle in Javascript, go fuck yourself. Go fuck yourself is why.Array(3)doesn’t create[undefined, undefined, undefined, ]; it creates[/* hole */, /* hole */, /* hole */, ]. The holes don’t set any property on the array whatsoever, so they are skipped when iterating. How this makes sense, I can’t tell you.Time is a flat circle
Yet the array contains exactly three nothings.
It’s like a zen koan.
We wrote it wrong on purpose, as a joke.
typeof(null) == ‘object’
Because some people think planning an entirely new language should take less than 2 weeks. 10 days, in this case.
See wat for more.
what does the +x do.
It makes sure
xis a number.what a wonderful and beautiful language. i’m so glad i asked
True
Lmao
If I was a JS programmer, I’d just write a bash script to download it every week for fun.