tn13 (u/tn13) - Readit News

tn13 commented on The Party Math Trick sambernheim.com/blog/the-... · Posted by u/bern4444

dragontamer · 4 years ago

Actual Math Party tricks are standard affairs: just jokes about Math.

* "Hey Babe, would you like to be my derivative and lie tangent to my curves?"

* Question: What did Euler discover while sitting on the toilet?

-- Answer: A natural log.

* Question: Why do programmers mix up Christmas and Halloween?

-- Answer: Because Dec(imal) 25 == Oct(al) 31.

* Once upon a time, a big, evil derivative was approaching town. All the polynomials ran away in terror, expecting themselves to be derived away. Suddenly, the local Sheriff appeared, and rode out to parley with the derivative.

The Sheriff and Derivative meet up, and a showdown was about to occur. Knowing that it will all be over soon, they exchanged pleasantries before the final showdown.

The Sheriff introduces himself: "I'm e^x, the Sheriff of this town. You can't dare to derive me!"

Upon hearing the name: the evil derivative gives a toothy grin and says "My name is d/dy".

Etc. etc. Assuming you're comfortable telling these kinds of jokes of course. As usual, you need to read the room and see if the jokes would fly in the company you're in.

tn13 · 4 years ago

Derivative of line parallel to floor is zer0.

tn13 commented on California moves to recommend delaying algebra to 9th grade statewide sfstandard.com/controvers... · Posted by u/moultano

bko · 4 years ago

This policy has nothing to do with the topic of algebra. This is code for advanced math, because algebra is typically considered advanced for < 9th grade children. Since the organizations feel ashamed that they're failing certain demographics as evidenced by being under-represented in the advanced classes, they're just scrapping the advanced classes for everyone. Truly disgraceful

tn13 · 4 years ago

This will make life even worse for the marginalized students as well off students will have parents or other sources of learning algebra.

tn13 commented on TIL the assumption that string length does not change when upper-cased is false chaos.social/@movonw/1073... · Posted by u/dredmorbius

dotancohen · 4 years ago

  > Except almost everyone always means #2.

Until the string has to be stored in a database. Or transmitted over HTTP. Or copy-pasted in Windows running Autohotkey. Or stored in a logfile. Or used to authenticate. Or used to authorize. Or used by a human to self-identify. Or encoded. Or encrypted. Or used in an element on a web page. Or sent in an email to 12,000,000 users, some of whom might read it on a Windows 2000 box running Nutscrape. Or sent to a vendor in China. Or sent to a client in Israel. Or sent in an SMS message to 12,000,000 users, some of whom might read it on a Nokia 3310. Or sent to my exwife.

tn13 · 4 years ago

English speaking world has developed intuition about strings due to ASCII which simply fails when it comes to Unicode and that basically explains a lot of these pitfalls.

String length when defined #2 is also fairly complex when it comes to some languages such as Hindi. There are some symbols in Hindi which are not characters and can never exist as their own character but when placed next to a character they create a new character. So when you type them out on a keyboard you have to bit two keys but only one character will appear on screen. Unicode too represents this as two separate characters but for human eye it is one.

त + या = त्या

Following code will print 4

console.log("त्या".length);

tn13 commented on S.F. bureaucracy has couple regretting they tried to open a noodle shop sfchronicle.com/sf/bayare... · Posted by u/fortran77

tn13 · 4 years ago

Only if they had told the city official that they were planing to cook meth and sell it on streets then these inspectors would have totally turned a line eye on this little operation.

The long story short the couple should hire the right contractor who has the city officials on take and things will go smoothly

tn13 commented on Canada seeks to end Uber's tax advantage over taxi companies reuters.com/article/us-ca... · Posted by u/mpatobin

tn13 · 8 years ago

What I would have preferred is that Canada removing the burden off the taxi companies and let them give competition to Uber in innovation space instead of trying to bribe politicians to act as gatekeepers.

tn13 commented on Carlsbad, CA to photograph every car entering city sandiegouniontribune.com/... · Posted by u/t23

pavel_lishin · 8 years ago

> Four council members, however, said they’re confident the information can be kept secure

Based on what? The contract appears to be with a company that provides safety equipment, not electronics/surveillance equipment. How exactly is Mallory Safety & Supply a trusted security provider?

> and that the system will increase safety for residents and police officers.

Based on what?

> They also said it may deter criminals from breaking the law in the city.

Based on what?

> “It’s really hard to put a price on trying to fight crime,” said Mayor Matt Hall. “When it’s a violent crime, and you can prevent it, how do you put a price on that?

What about all the times when it's not a violent crime? When it's not a crime at all? The statistics cited at the beginning of the article didn't mention violent crimes at all.

tn13 · 8 years ago

Based on bureaucratic overconfidence.

The real problem with most american cities is that there isn't that much crime yet the politicians feel the need to fight non-existent unfightable crime by making our lives miserable. California could have lead the way in offering good solutions for homelessness, mental illness, drug war, school choice etc. but yet it pushes for more and more nazi styled policies.

tn13 commented on A new kind of doctor's office could lead to cheaper prescriptions businessinsider.com/how-p... · Posted by u/walterbell

paulddraper · 8 years ago

What is "hospitals" in that graph? Like real estate? Equipment? Secretaries?

tn13 · 8 years ago

Hospitals = real estate + admin staff + operational expenses.

Liability insurance for example will come under this and so will the retainer for the lawyers who will help you understand complexities of ACA.

tn13 commented on $10 Quintilian Asteroid to Stay Out of Reach of Space Miners 60secondstatistics.com/as... · Posted by u/saeedjabbar

olegkikin · 8 years ago

The important thing to note here is that "precious metals" and "rare minerals" really aren't. Given advanced enough technology, they become abundant.

That happened with aluminum - they used to make very expensive jewelry out of it, till we learned how to mine it efficiently, and now it's $1.9 per kilo.

I expect the same to happen to gold, silver, platinum. Diamonds are already on their way.

tn13 · 8 years ago

Obviously. Same goes for fossil fuels and water.

tn13 commented on Hikikomori: The Postmodern Hermits of Japan warscapes.com/opinion/hik... · Posted by u/marsrover

tn13 · 8 years ago

This might be just an oriental way of living. I am not sure why researchers are hell bent on classifying almost anything as some kind of mental issue. I frequently stepped out of workspace to grab a hot coffee and my psychologist friend told me that drinking hot beverages frequently is a person's way of coping to the lack of emotional warmth in life by replacing it with material warmth!