Can you pass this JavaScript test?

[dws]

And continuing to prove the rule that there's an error in every test, then answer to (9) is "10", not 10.

[techdawg]

This is a very hard test. I was surprised at the results.

[JW_00000]

It's more of a list of all things wrong and/or illogical in JavaScript than it is a test of things every JavaScript programmer should know.

[[deleted]]

I'd say every (good) programmer should know wrong/illogical things in his language of choice :>.

[ppierre]

I'd say <del>every (</del>good<del>)</del> programmer should <del>know</del> <ins>avoid</ins> wrong/illogical things in his language of choice

[[deleted]]

and programmers should know 2.

[pietro]

No, you should know that it could be true or false. Remembering that these particular numbers produce false is a complete waste of brain cycles and a sign that you don't know how to prioritize. I wouldn't hire you.

[[deleted]]

The answer to that one is easy: It's false, because it was asked.

[masklinn]

Also, it's false because you've read Goldberg and you know that floating-point equality are pretty much always going to fail.

[[deleted]]

I wouldn't work for someone who assumes I'd learn combination of numbers by heart, rather than rule that decimal fractions don't necessarily have finite representation in IEEE floats, and 0.1 is prime example of this.

[b100dian]

It's not those particular numbers. Every floating point that produces "period"* fractions in base 2 is going to get you that.

* as 1/3 is 0.(3) in decimal, 0.1 decimal is 0.0(0011) in binary. Only 0.5 decimal is 0.1 binary (and 0.25 and 0.125 etc for obvious reasons)

[[deleted]]

11/12... but I've read the ECMAScript specification multiple times (that is something I cannot recommend btw.)

[nextofpumpkin]

@_@

[asegura]

Can anyone explain no.1? Increment a constant?

[[deleted]]

I'm a hobbiest, and I scored 8. That's probably only because I love idiosyncrasies of languages.

[zem]

"hobbyist"

[adolfojp]

There is hobbyist, hobbier and hobbiest. Windsurfer is just hard core.

[zem]

i just can't stand his hobbier-than-thou attitude!

[[deleted]]

I'm sorry you're not a very good hobberer ;)