piaoger

##https://vulkan.lunarg.com/

## https://vulkan.lunarg.com/sdk/home

# 18.04
wget -qO - http://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-1.1.101-bionic.list http://packages.lunarg.com/vulkan/1.1.101/lunarg-vulkan-1.1.101-bionic.list
sudo apt update
sudo apt install lunarg-vulkan-sdk

piaoger

import (
    "os"
    "syscall"
    "time"
)

func statTimes(name string) (atime, mtime, ctime time.Time, err error) {
    fi, err := os.Stat(name)
    if err != nil {

piaoger

import (
    "bytes"
    "encoding/json"
    "errors"
    "fmt"
    "github.com/BurntSushi/toml"
    "errors"
)

// borrowed from golang playgroud:

piaoger

#!/bin/bash

appname=python

getpids() {
    local pids=$(ps -ef | grep $1 | grep -v grep| awk '{print $2}')
    echo $pids
}

pids=`getpids $appname`

piaoger

# I want compress yesterday's log, so I have to learn how to get yesterday with bash
# yesterday=$(date --date='-1 day' +%Y-%m-%d)
# today=$(date +%Y-%m-%d)
# yesterday_log=service_log_${yesterday}.log
# zip ${yesterday_log}.zip ${yesterday_log}

## today
today=$(date +%Y-%m-%d)

piaoger

# raii (c++)

 before:
 void UseFile(char const* fn)
{
    FILE* f = fopen(fn, "r");        // 获取资源
    // 使用资源
    try {
        if (!g()) { fclose(f); return; }
        // ...

piaoger

// https://en.wikipedia.org/wiki/Dangling_pointer


void f() {
	int *x = malloc(sizeof(int));
	*x = 1024;
	printf("%d\n", *x);

piaoger

// http://rustbyexample.com/scope/borrow.html
// https://is.gd/E0jeLL

fn simple_borrow() {

    let mut v = vec!["A"];

    {
        // immutable borrow

piaoger

// https://play.rust-lang.org/
// https://is.gd/VHQlvO


    // Line comments which go to the end of the line.
    /* Block comments which go to the closing delimiter. */


fn main () {

piaoger

# open file manager of current directory in the terminal
# http://askubuntu.com/questions/31069/how-to-open-a-file-manager-of-the-current-directory-in-the-terminal

xdg-open .

# mac
# open .