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product | price | quantity | |
---|---|---|---|
widget1 | 19.95 | 10 | |
widget2 | 24.00 | 20 | |
widget1 | 12.00 | 40 |
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import java.sql.*; | |
import java.util.logging.*; | |
import javafx.application.Application; | |
import javafx.collections.*; | |
import javafx.event.ActionEvent; | |
import javafx.event.EventHandler; | |
import javafx.scene.Scene; | |
import javafx.scene.control.*; | |
import javafx.scene.layout.*; | |
import javafx.stage.Stage; |
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# Raw transaction API example work-through | |
# Send coins to a 2-of-3 multisig, then spend them. | |
# | |
# For this example, I'm using these three keypairs (public/private) | |
# 0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86 / 5JaTXbAUmfPYZFRwrYaALK48fN6sFJp4rHqq2QSXs8ucfpE4yQU | |
# 04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec6874 / 5Jb7fCeh1Wtm4yBBg3q3XbT6B525i17kVhy3vMC9AqfR6FH2qGk | |
# 048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d46213 / 5JFjmGo5Fww9p8gvx48qBYDJNAzR9pmH5S389axMtDyPT8ddqmw | |
# First: combine the three keys into a multisig address: | |
./bitcoind createmultisig 2 '["0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86","04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a9 |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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def m = "1234 abc" =~ /^(\d+)/ | |
def n = "abc 1234" =~ /^(\d+)/ | |
println (m.find()?m.group():"not matched") | |
println (n.find()?n.group():"not matched") | |
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<?xml version="1.0" encoding="UTF-8"?> | |
<project xmlns="http://maven.apache.org/POM/4.0.0" | |
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | |
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 | |
http://maven.apache.org/maven-v4_0_0.xsd"> | |
<modelVersion>4.0.0</modelVersion> | |
<groupId>com.example.android</groupId> | |
<artifactId>my-android-app</artifactId> | |
<version>0.1</version> | |
<packaging>apk</packaging> |
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