If you're inventing and pioneering, you have to be willing to be misunderstood for long periods of time
Mingi hulga A astmehulgaks 2^A ehk P (A) nimetatakse selle hulga kõikide osahulkade hulka.
Näide: Olgu antud A = { a b } Sellise hulga A astmehulk on: 2^ A = P (A) = { { } { a } { b } { a b } }
Hulga { 0 , 1 , 2 } astmehulk on: 2^ {0 , 1 , 2} = P ( { 0 , 1 , 2 } ) = { { } {0} {1} {2} {0 1} {0 2} {1 2} { 0 1 2 } }
Mul oli pikka aega regulaarsuse aksioomist keeriline aru saada. Kirjeldus, kuidas seda mulle esitleti oli:
Suvalises mittetühjas hulgas x peab leiduma selline element z nii, et x ja z ei oma ühiseid elemente.
Ehk on see minu isiklik probleem, et järgnev seletus tundub mulle asjakohasem:
Igas mittetühjas hulgas peab leiduma element, mille ühisosa antud hulgaga on tühi.
No ja kokkuvõtteks, milleks regulaarsuse aksioomi üldse vaja. Aksioomi eesmärgiks on välistada ebameeldivad olukorrad, nagu näiteks a kuulub a või a kuulub b ja b kuulub a.
I have long time considered how to build digital watch. Now I am ready for this. I did not wanted to do it without real time clock (DS1302). So ordered some from china and now I got them
I put together first prototype and it works nice
So RTC gives me time
DS1302RTC is connected to Arduino. Later I will design my own board and going to use Atmega328PU. Battary keeps time even external power is down.
At the moment this is my fancy user interface. Later I will use LCD or OLED
This is handy option. Now I can calculate exactly how long my outdoor sensors last
First sensor can send his battery level data
[INFO] ————————————————————————
[INFO] Reactor Summary:
[INFO]
[INFO] Spark Project Parent POM ……………………… SUCCESS [ 6.556 s]
[INFO] Spark Project Networking ……………………… SUCCESS [ 9.198 s]
[INFO] Spark Project Shuffle Streaming Service ………… SUCCESS [ 6.381 s]
[INFO] Spark Project Core …………………………… SUCCESS [03:50 min]
[INFO] Spark Project Bagel ………………………….. SUCCESS [ 54.482 s]
[INFO] Spark Project GraphX …………………………. SUCCESS [06:40 min]
[INFO] Spark Project Streaming ………………………. SUCCESS [08:14 min]
[INFO] Spark Project Catalyst ……………………….. SUCCESS [11:32 min]
[INFO] Spark Project SQL ……………………………. SUCCESS [14:46 min]
[INFO] Spark Project ML Library ……………………… SUCCESS [19:02 min]
[INFO] Spark Project Tools ………………………….. SUCCESS [01:05 min]
[INFO] Spark Project Hive …………………………… SUCCESS [14:48 min]
[INFO] Spark Project REPL …………………………… SUCCESS [04:39 min]
[INFO] Spark Project Assembly ……………………….. SUCCESS [04:55 min]
[INFO] Spark Project External Twitter ………………… SUCCESS [ 50.438 s]
[INFO] Spark Project External Flume Sink ……………… SUCCESS [ 59.100 s]
[INFO] Spark Project External Flume ………………….. SUCCESS [01:59 min]
[INFO] Spark Project External MQTT …………………… SUCCESS [ 41.876 s]
[INFO] Spark Project External ZeroMQ …………………. SUCCESS [01:11 min]
[INFO] Spark Project External Kafka ………………….. SUCCESS [01:40 min]
[INFO] Spark Project Examples ……………………….. SUCCESS [09:52 min]
[INFO] ————————————————————————
scala> val kala = (x: Int, y: Int) => x + y
kala: (Int, Int) => Int = <function2>
scala> kala(1,3)
res71: Int = 4
scala> val kala2 = (x: Int, y: Int) => x + y
kala2: (Int, Int) => Int = <function2>
scala> val kala3 = (x: Int, y: Int) => kala(x,y)+kala2(y,x)
kala3: (Int, Int) => Int = <function2>
scala> kala3(1,2)
res75: Int = 6
Bought new toy 2.4 Inch TFT LCD Shield Touch Board Display Module For Arduino UNO
It took about an hour to find right libs
Using ILI9325 driver
https://github.com/samuraijap/TFTLCD-Library
https://github.com/adafruit/Adafruit-GFX-Library
and to get first picture but here it is
Recently did some haskell coding and just some lines to explain my enthusiasm.
Let’s try to calculate perfect numbers:
First I have helper function factors to get number factors:
factors :: Int -> [Int]
factors a = [ x | x <- [1..a], y <- [1..a], x*y == a ]
and the main function is:
perfects :: Int -> [Int]
perfects x = [a | a <- [1..x], sum (init(factors a)) == a, a <= x]
to get perfect numbers under limit believe me you want to limit the calculation 🙂