2015 Apr 2, 2:18
combined all the podcast promo codes I've ever heard and now
Squarespace owes me $30,000
2013 Aug 7, 7:14
When writing a JavaScript library that uses postMessage and the message event, I must be considerate of other JS code that will be
running along side my library. I shouldn't assume I'm the only sender and receiver on a caller provided MessagePort object. This means obviously I should use addEventListener("message" rather than
the onmessage property (see related
What if two programs did this?). But considering the actual messages traveling
over the message channel I have the issue of accidentally processing another libraries messages and having another library accidentally process my own message. I have a few options for playing nice
in this regard:
-
Require a caller provided unique MessagePort
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This solves the problem but puts a lot of work on the caller who may not notice nor follow this requirement.
-
Uniquely mark my messages
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To ensure I'm acting upon my own messages and not messages that happen to have similar properties as my own, I place a 'type' property on my postMessage data with a value of a URN unique to me
and my JS library. Usually because its easy I use a UUID URN. There's no way someone will coincidentally produce this same URN. With this I can
be sure I'm not processing someone else's messages. Of course there's no way to modify my postMessage data to prevent another library from accidentally processing my messages as their own. I
can only hope they take similar steps as this and see that my messages are not their own.
-
Use caller provided MessagePort only to upgrade to new unique MessagePort
-
I can also make my own unique MessagePort for which only my library will have the end points. This does still require the caller to provide an initial message channel over which I can
communicate my new unique MessagePort which means I still have the problems above. However it clearly reduces the surface area of the problem since I only need once message to communicate the
new MessagePort.
The best solution is likely all of the above.
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DOM html javascript messagechannel postMessage programming technical 2013 Jul 28, 1:46humor glasses cosplay 2012 Jun 4, 12:48humor crow murder bird 2012 Mar 5, 3:17
Fictional plot summaries of TNG S8 episodes. Like:
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Q’s back: he’s wearing scuba gear and needs Picard’s help dumping his girlfriend. Barclay accidentally locks himself outside the ship.
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Geordie and Data nurse a space bird back to health, and are sad when they have to release it. Picard is trapped in a turbolift with a baby.
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Starfleet sends a cantankerous admiral to boss around Picard during delicate peace talks. Data seems to have mastered bragging.
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Riker’s ex-girlfriend arrives and dies, leaving behind a pile of glowing dust and a mystery. Picard is trapped on a turbolift with a horse.
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A planet of suspicious docents abduct Riker for their museum of amazing men. Geordi and Data are too excited to sleep at their sleepover.
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Picard is trapped inside a sentient turbolift. A clip show highlights the most memorable “Picard is trapped on a turbolift” moments.
humor twitter tng tv 2009 Apr 13, 12:14On mad science vs mad engineering.
humor science comic engineering 2009 Feb 10, 6:34Real time stats on folks cursing on Twitter. Shows percentage change in usage by curse word.
twitter humor language swearing mashup
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