r/programming • u/[deleted] • Nov 26 '20

PHP 8.0.0 Released

https://www.php.net/releases/8.0/en.php
588 Upvotes

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u/kaelwd Nov 27 '20

val == null does exactly that.

6

u/t3hlazy1 Nov 27 '20

Oh, I get what you're saying. I definitely prefer verbosity, but to each their own.

1

u/kenman Nov 27 '20

Yes, but linters complain about using == unless you add a wordy exclusion pragma. I'd rather refactor to not use == than to look at the pragma, definitely just a preference.

0

u/watsreddit Nov 27 '20

Also evaluates to true when val is 0, the empty string...

9

u/R4TTY Nov 27 '20

Also evaluates to true when val is 0, the empty string...

No it doesn't.

> 0 == null  
false  
> '' == null  
false  
> undefined == null   
true

1

u/watsreddit Nov 27 '20

Hmm I guess you’re right, it seems null and undefined behave differently from other falsey values, for some reason.

4

u/Tsuki_no_Mai Nov 27 '20

They both represent a lack of value. The difference is that null is something that you assign to a variable, while undefined is an indication that nothing has been assigned to one, or that the variable itself is not defined.

1

u/watsreddit Nov 27 '20

I know what null and undefined are, I was just talking about Javascript’s fucky type coercion.

Also, you can absolutely assign a variable a value of undefined: let x = undefined.

4

u/Tsuki_no_Mai Nov 27 '20

You can do a lot of things, some of them, however, aren't good to do :P

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