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package net.clarenceho.util; | |
import java.util.function.UnaryOperator; | |
import java.math.BigDecimal; | |
import java.math.RoundingMode; | |
/** | |
* Given equation y = f(x), find successively better approximations to the roots | |
* (or zeroes) of a real-valued function (i.e. find x where y = 0) | |
* <p> |
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package net.clarenceho.util; | |
import static org.junit.Assert.*; | |
import org.junit.Test; | |
import java.math.BigDecimal; | |
public class TestNewton { | |
@Test |
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#!/usr/bin/env python | |
# Testing I2C on Raspbery Pi | |
# Send a byte to slave and request a byte back | |
# | |
# Created by Clarence Ho 2015 | |
import smbus | |
import time | |
# for RPI rev 1... |
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long long perfectSquare(long long num) | |
{ | |
// obvious cases | |
int lastDigit = num % 10; | |
if (num <= 0 || lastDigit == 2 || lastDigit == 3 || lastDigit == 7 || lastDigit == 8) | |
{ | |
return 0; | |
} | |
long long section = 1; |
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package net.clarenceho.test; | |
public class FizzBuzz { | |
public static String doFizzBuzz1(int i) { | |
StringBuilder sb = new StringBuilder(); | |
if (i % 3 == 0) { | |
sb.append("Fizz"); | |
} | |
if (i % 5 == 0) { |
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# Copyright 2012 the V8 project authors. All rights reserved. | |
# Redistribution and use in source and binary forms, with or without | |
# modification, are permitted provided that the following conditions are | |
# met: | |
# | |
# * Redistributions of source code must retain the above copyright | |
# notice, this list of conditions and the following disclaimer. | |
# * Redistributions in binary form must reproduce the above | |
# copyright notice, this list of conditions and the following | |
# disclaimer in the documentation and/or other materials provided |
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import cv2 | |
import numpy as np | |
cv2.namedWindow("camera", 1) | |
capture = cv2.VideoCapture(0) | |
# Set to None to use default size | |
# To improve performance, can specify a lower resolution. e.g. 320x240 | |
width = 320 | |
height = 240 |
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package net.clarenceho.TriFib; | |
import java.util.stream.Stream; | |
import java.math.BigInteger; | |
public class FibonacciNum { | |
/** | |
* Stream of Fibonacci number in BigInteger | |
* @return stream of Fibonacci number |
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~$ cat /proc/cpuinfo | |
processor : 0 | |
model name : ARMv8 Processor rev 1 (v8l) | |
BogoMIPS : 38.40 | |
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 | |
CPU implementer : 0x41 | |
CPU architecture: 8 | |
CPU variant : 0x1 | |
CPU part : 0xd07 | |
CPU revision : 1 |
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~$ dmesg | |
[ 0.000000] Booting Linux on physical CPU 0x0 | |
[ 0.000000] Linux version 4.9.140-tegra (buildbrain@mobile-u64-3531) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05) ) #1 SMP PREEMPT Wed Mar 13 00:32:22 PDT 2019 | |
[ 0.000000] Boot CPU: AArch64 Processor [411fd071] | |
[ 0.000000] OF: fdt:memory scan node memory@80000000, reg size 48, | |
[ 0.000000] OF: fdt: - 80000000 , 7ee00000 | |
[ 0.000000] OF: fdt: - 100000000 , 7f200000 | |
[ 0.000000] Found tegra_fbmem: 00800000@92cb6000 | |
[ 0.000000] OF: fdt:Reserved memory: failed to reserve memory for node 'fb0_carveout': base 0x0000000000000000, size 0 MiB | |
[ 0.000000] OF: fdt:Reserved memory: failed to reserve memory for node 'fb0_carveout': base 0x0000000000000000, size 0 MiB |
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