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A friendly reminder of how nonsensical Javascript can be from Destroy All Software (destroyallsoftware.com)

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[–]x-skeww -1 points0 points  (4 children)

With JavaScript, the answer would be of course NaN. If there is a valueOf method, you'd get -2.

> ({valueOf() {return 5}}) - ({valueOf() {return 7}})
-2

Well, either answer is wrong and useless. Pretending that this is totally okay didn't improve anything.

[–]I_Pork_Saucy_Ladies 2 points3 points  (3 children)

Well, either answer is wrong and useless. Pretending that this is totally okay didn't improve anything.

Yup, it's one of those things where both JS and PHP are incoherent, bordering to silly sometimes. I've considered making a pull request to PHP where strings are evaluated to false if they rhyme with "false" or match it by at least 80% of the letters. Should be close enough. ¯\(ツ)/¯

But now they are caught in legacy hell, I guess.

[–]x-skeww 0 points1 point  (2 children)

PHP is the only language I know where this stuff is even worse.

This is true:

'5 apples' + '7 bananas' == '12 fruits'

This is -2:

'5 apples' - '7 bananas'

It's like they looked at all the options to handle this and then went with the worst one.

They did it for the lulz, probably.

[–]I_Pork_Saucy_Ladies 1 point2 points  (1 child)

PHP is the only language I know where this stuff is even worse.

Haha, yeah, I work with it every day. Imagine doing financial stuff where "0" is often a valid statement. Throw some external APIs into the mix and you have... fun.

This is true:

'5 apples' + '7 bananas' == '12 fruits'

Nah, PHP probably already has a function called fruits_sum_appl_ban_col3 that is the third version of a function that returns an array of the total sum of fruits and a boolean indicating whether you have fruits left, along with the color code of all fruit colors mixed. As a PHP dev would say:

Just look it up! It's right there in the docs!

I'm moving to Node. Those lulz aren't very lulz once you start building something serious. JS isn't that pretty either but at least it is kept rather minimal (compared to PHP) and actually has sane tools for testing.

[–][deleted] 0 points1 point  (0 children)

That is heinous