aexaey

Joined 11 years ago

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789

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381

Member since

Jul 21

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Comment · 7 years ago

How does function sound for a syntactic sugar?

  $ today() { date +%F; }
  $ echo Today, $(today) is a great day!
  Today, 2019-01-08 is a great day!

Comment · 8 years ago

Since nobody mentioned Zulip's REST API yet, I'll do. There is one, and and it is really good.

There are also native language-specific wrappers for that API, for example in python[1], which lets you write a bot in 5 lines:

  import zulip
  client = zulip.Client()
  def onmsg(m):
     print ("at %d, %s said: %s" %
          (m['timestamp'],
           m['sender_email'],
           m['content']))
  client.call_on_each_message(callback=onmsg)

[1] https://pypi.org/project/zulip/

Comment · 8 years ago

  > apt-get update/upgrade every week

Have a look at: https://wiki.debian.org/UnattendedUpgrades

Comment · 8 years ago

Yes, you're right.

What I was trying to say is - On Linux, INADDR_ANY (0.0.0.0) supplied to connect() or sendto() calls is treated as a synonym for INADDR_LOOPBACK (127.0.0.1) address.

Not so for bind() or course.

Comment · 8 years ago

0, which is a shorthand for 0.0.0.0 is likely the most code-golf-y way to write localhost, as many [EDIT: Linux] systems alias 0.0.0.0 to 127.0.0.1:

  $ ping 0
  PING 0 (127.0.0.1) 56(84) bytes of data.
  64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.032 ms

Of course, don't expect this to work universally. A lot of software will try to be clever with input validation, and fail.

Comment · 8 years ago

  1.2 -> 1.0.0.2
  1.2.3 -> 1.2.0.3

But then, much of software would fail here - Firefox/Chrome for example would both threat that as bareword and redirect to search page.

Comment · 8 years ago

SD cards and eMMC chips[0] do have controller inside. Usually not a great one (tens to hundred-ish MB/s), but that's good enough - overwhelming majority of smartphones/tablets use eMMC for internal storage.

UFS/eUFS cards keep (sort of) same form-factor [1] but bring significant speed boost. [2]

[0] Technically, it is incorrect to say "eMMC chip", as there are typically two (or more) silicon chips inside the same plastic BGA package. One of them is controller.

[1] https://www.dpreview.com/news/6387181333/samsung-launches-fi...

[2] https://en.wikipedia.org/wiki/Universal_Flash_Storage#Versio...

Comment · 8 years ago

There are ready-made boards for this being sold for less than $2. Just search "eMMC Adapter 153 without flash" on ebay.

153 is number of balls on the eMMC chip OP is using. You might need a different adapter for different eMMC chip.

Comment · 8 years ago

Percent, rather than asterisk.

  UPDATE t SET foo='bar' WHERE baz LIKE '$INPUT';

This will do no changes when $INPUT is empty, and only with $INPUT set to '%' will it update every record.

Comment · 8 years ago

...and, if especially unlucky, that would be the trunk you're using to connect to that switch.

Comment · 8 years ago

One example where XIP would be really useful is MT7688KN [1], which is a variant of MT7688 WiFi router SoC, already well supported by Linux/OpenWRT, plus 8MB of RAM on the same package.

Since no external RAM is required this makes for some very compact WiFi repeaters [2,3]. But all of them ship with VxWorks. I've tried to tinker with OpenWrt on this chip, but with 2-3MB free RAM after kernel boots (and that's before wifi modules are loaded), it doesn't look too good. With XIP, on the other hand, MT7688KN can potentially become a useful OpenWRT platform.

[1] https://www.mediatek.com/products/smartHome/mt7688k

[2] https://fccid.io/2AK8V-WF8300

[3] Xaiomi Mi Wifi+