D-sense

import 'package:flutter/material.dart';

import 'dart:async';

void main() => runApp(new BackButtonOverrideDemoWidget());

class BackButtonOverrideDemoWidget extends StatefulWidget{
  @override
  _BackButtonOverrideDemoWidgetState createState() => new _BackButtonOverrideDemoWidgetState();
}

D-sense

/*
********************************************************************************
Golang - Asterisk and Ampersand Cheatsheet
********************************************************************************

Also available at: https://play.golang.org/p/lNpnS9j1ma

Allowed:
--------
p := Person{"Steve", 28} 	stores the value

D-sense

# use the latest ubuntu environment (18.04) available on travis
dist: xenial

language: go

# Force-enable Go modules. Also force go to use the code in vendor/
# These will both be unnecessary when Go 1.13 lands.
env:
  - GO111MODULE=on
  - GOFLAGS='-mod vendor'

D-sense

name: Release
on:
  release:
    types:
      - published

jobs:
  release:
    name: Release
    runs-on: ubuntu-latest

D-sense

package main

// This is an example of a resilient service worker program written in Go.
//
// This program will run a worker, wait 5 seconds, and run it again.
// It exits when SIGINT or SIGTERM is received, while ensuring any ongoing work
// is finished before exiting.
//
// Unexpected panics are also handled: program won't crash if the worker panics.
// However, panics in goroutines started by the worker won't be handled and have

D-sense

package main

import "fmt"

type node struct {
    value string
    left  *node
    right *node
}

D-sense

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "[email protected]"

D-sense

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

D-sense

package main

import (
	"log"
	"time"
)

func main(){
	input := 50

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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