The Eclectic Quill

Website of Joshua McGee

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Happy 82nd Birthday, Carl Sagan!

carl-sagan-one-world-quote-2-r

We humans are one species and this is our world — Carl Sagan, 1934 – 1996

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It is not “intolerance” to oppose Trump and his supporters

It is all the rage in some conservative circles online to point at people who oppose Donald Trump, or who oppose supporters of Trump, and say "Look at you, preaching tolerance all the time, and now you show that you are nothing but a bigot!"

OK.  Let's break this one down.

"Tolerance", properly construed, is merely a convenient shorthand for recognizing the humanity of others and their right to carry on in any fashion that does not actively harm another person.  It is not magnanimity to "tolerate" gay people, or fat people, or people in wheelchairs, or people with a different skin color — rather, it is an act of wickedness to ostracize them.

Likewise, no one argues that we should tolerate a man who is assaulting someone in the middle of the street.  It is an immoral act to permit an assault — when you prevent violence, you are not denying a man his right to harm others, you are supporting his victim's right not to be subjected to violence.

I would go a step further: it is an immoral act to tolerate someone who stands by and watches a man commit violence against another human being without attempting to intercede, let alone someone who cheers that man on.  Such a person is not expressing a simple difference; such a person is enabling an unjust act.  And that gets us to Trump and his supporters.

No, I will not "tolerate" Donald Trump.  No, I will not "tolerate" your right to support Donald Trump.  To do so would, itself, be an injustice.  Trump is — with every breath and every joke and every grope — degrading and insulting and injuring and threatening and violating our fellow citizens.  To oppose him, and the people who enable him, is not called "intolerance".  To oppose them is called "morality".

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Just when you thought you had mastered cross-browser testing…

Just when you thought you had mastered cross-browser testing, emoji come along

Just when you thought you had mastered cross-browser testing, emoji come along

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What disqualifies a Priority Mail flat-rate envelope?

A USPS Priority Mail flat-rate envelope will ship for a fixed price, regardless of its weight, "up to 70 pounds".  Neat.  But hold on:  seventy pounds?  How much can those things hold?

I checked the Domestic Mail Manual.  You are allowed to reinforce the seams and the seal with tape, but unless the envelope is slim enough to seal with its own adhesive, it is ineligible for flat-rate service.  So what's the maximum volume you can fit in there?

I estimated with a stack of copy paper.  The envelope will close around a 1.9cm stack.  Any more than that, and it's too thick.  But Priority Mail envelopes are slightly longer than a sheet of copy paper.  As a rough (but generous) estimate, if you are constrained to a rectangular prism, you can maybe fit something that is 1.9cm x 22cm x 30cm into one.  That's 1250cc, or 0.00125 cubic meters.

That's 0.00125 m3 that is allowed to weigh 32kg, mind you.  This means that the item you are mailing can have a density of 25,600 kilograms per cubic meter and still be permissible.

So I turned to The Engineering Toolbox, copied the alloy density table, pasted it into Google Sheets, and sorted it.

A slab of solid aluminum has a typical density of 2712 kg/m3.  But forget that.  Aluminum is light.

How about steel?  7850 kg/m3.  That's more than a factor of four.

Copper?  8940 kg/m3.  Still a factor of four.

Fine, let's pull out the big guns.  I want to mail you a slab of lead in a Priority Mail envelope.  That would be 14kg, or 31 pounds.

OK.  Gold.  A hefty 53 pounds.

Let's scroll to the bottom.  There we go:  iridium!  I want to mail you a 1.9cm x 22cm x 30cm slab of prone-to-shattering iridium in an unpadded cardboard-and-plastic-tape envelope.  So I go out and pay the seventeen thousand dollar spot-price for a slab of iridium, stick it in a Priority Mail envelope, add some packing tape to reinforce the seams (better safe than sorry), insure it for the maximum $500 (because I'm not an idiot, obviously), and take it to the Post Office.  They place it on the scale.  And it would weigh ... under 62 pounds.  It's mailable.  I could even include a little thank-you-for-your-business note and it wouldn't take it over the seventy-pound mark.

So watch your mailbox.  It's possible that you'll be getting a seventeen thousand dollar slab of iridium in a Priority Mail envelope from me.

I mean, it's not likely.  But it's definitely possible.

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chime: Have your remote server make a bell sound in your local terminal

I needed notification, in my local terminal, when a remote process was finished executing.  I also thought it would be nice if I could wait for multiple notifications and tell them apart by the number of bell sounds I heard.  I came up with this.

On your remote server, copy the following to /usr/local/bin, rename it chime, and make it executable:

If your remote server runs Ubuntu, then this slightly longer script will install the needed dependency (tput) and install the script for you:

To have your local terminal chime once, run chime in your remote shell:

chime

To have your local terminal chime five times, run chime with an argument of 5:

chime 5

... and you should be good to go.