edingroot

package org.example

import com.sksamuel.scrimage.ImmutableImage
import com.sksamuel.scrimage.ScaleMethod
import com.sksamuel.scrimage.nio.ImageIOReader
import com.sksamuel.scrimage.nio.JpegWriter
import net.coobird.thumbnailator.Thumbnails
import net.coobird.thumbnailator.resizers.configurations.ScalingMode
import java.io.ByteArrayOutputStream
import java.io.File

edingroot

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

edingroot

#!/bin/sh
tstart=$(date +%s%N)
cstart=$(cat /sys/fs/cgroup/cpu/cpuacct.usage)

sleep 5

tstop=$(date +%s%N)
cstop=$(cat /sys/fs/cgroup/cpu/cpuacct.usage)

bc -l <<EOF

edingroot

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

edingroot

CC := g++

INCLUDE_PATH = -Isrc/http_server/core
CPPFLAGS := -std=c++14 $(INCLUDE_PATH)

HTTP_SERVER_SOURCES = $(shell find ./src/http_server -type f -name '*.cpp')
HTTP_SERVER_OBJS = $(HTTP_SERVER_SOURCES:%.cpp=%.o)

CONSOLE_CGI_SOURCES = $(shell find ./src/console_cgi -type f -name '*.cpp')
CONSOLE_CGI_OBJS = $(CONSOLE_CGI_SOURCES:%.cpp=%.o)

edingroot

// PS. Another approach with Observable: https://stackoverflow.com/a/36383691

import io.reactivex.BackpressureStrategy;
import io.reactivex.Flowable;
import io.reactivex.schedulers.Schedulers;

public class ParallelFlowableLimit {
    public static void main(String[] args) {
        // Flowable.range(0, 10)
        Flowable.create(emitter -> {

edingroot

/**
 * Numerical Computation HW1.2 / by Chi Chang
 * Ref:
 *   http://en.cppreference.com/w/cpp/numeric/math/fpclassify
 *   http://en.cppreference.com/w/cpp/types/numeric_limits/signaling_NaN
 *   https://en.wikipedia.org/wiki/NaN
 */
 
#include <iostream>
#include <cmath>

edingroot

function fract(x) {
    return x - Math.floor(x);
}

function packFloat(x) {
    let s = x > 0 ? 1 : -1;
    let e = Math.floor(Math.log2(s * x));
    let m = s * x / Math.pow(2, e);
    return [
        Math.floor(fract((m - 1) * 256 * 256) * 256),

edingroot

/**
 * NOTE: node id should start from 1
 * topo.txt format (see the end of this file for example):
 *  #row id1 id2 cost
 *  0    1   2   2.0
 */

#include <stdio.h>
#include <stdlib.h>
#include <vector>

edingroot

public class Main {

    public static void main(String[] args) {
        int num = -32700;

        // Signed int to 2 bytes (32767 ~ -32768)
        byte b0, b1;
        b1 = (byte) ((num & 0xff00) >> 8);
        b0 = (byte) (num & 0xff);