zhaorui

# Get and Set Hostname
sudo scutil --get HostName
sudo scutil --get ComputerName
sudo scutil --get LocalHostName
hostname

sudo scutil --set HostName billMacMini

# Disable automount folder, modify /etc/auto_master, comment the "home" line
# Finally, restart the Mac, if you think it's cumbersome, use

zhaorui

#!/bin/bash

PRIMARYGROUP="Domain Users"

gen_apple_id()
{
    set -x
    local NAME=$1
    local TYPE=$2
    echo name: $NAME

zhaorui

echo "ibase=16; AB7833DF" | bc
echo "obase=2;  4294967295" | bc

zhaorui

override func viewDidLoad() {
      let workingQueue = dispatch_queue_create("myqueue", nil)
        
        dispatch_async(workingQueue) {
            print("working hard...")
            NSThread.sleepForTimeInterval(2)
            
            dispatch_async(dispatch_get_main_queue()){
                print("Work Done, updateUI")
            }

zhaorui

git revert HEAD~n..HEAD~m
回滚区间［HEAD~n + 1, HEAD~m］上的commit

zhaorui

let image = UIImage(named: "car.jpg")
let hasAlpha = false
let scale: CGFloat = 0.0 // Automatically use scale factor of main screen

UIGraphicsBeginImageContextWithOptions(CGSize(width: 80, height:80), !hasAlpha, scale)
image?.draw(in: CGRect(origin: CGPoint(x: 0, y: 0), size: CGSize(width: 80, height: 80)))
let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

zhaorui

extension CharacterSet {
    var characters:[UnicodeScalar] {
        var chars = [UnicodeScalar]()
        for plane:UInt8 in 0...16 {
            if self.hasMember(inPlane: plane) {
                let p0 = UInt32(plane) << 16
                let p1 = (UInt32(plane) + 1) << 16
                for c:UInt32 in p0..<p1 {
                    if let us = UnicodeScalar(c) {
                        if self.contains(us) {

zhaorui

extension NSButton {
 
    var titleTextColor : NSColor {
        get {
            let attrTitle = self.attributedTitle
            return attrTitle.attribute(NSForegroundColorAttributeName, at: 0, effectiveRange: nil) as! NSColor
        }
        
        set(newColor) {
            let attrTitle = NSMutableAttributedString(attributedString: self.attributedTitle)

zhaorui

# Path to Oh My Fish install.
set -q XDG_DATA_HOME
and set -gx OMF_PATH "$XDG_DATA_HOME/omf"
or set -gx OMF_PATH "$HOME/.local/share/omf"

# Load Oh My Fish configuration.
source $OMF_PATH/init.fish

set -x PATH $PATH ~/GitRepo/depot_tools
set -x PATH $PATH ~/.cargo/bin

zhaorui

#include<netinet/in.h>    
#include<stdio.h>    
#include<stdlib.h>    
#include<sys/socket.h>    
#include<sys/stat.h>    
#include<sys/types.h>    
#include<unistd.h>    
    
int main() {    
   int create_socket, new_socket;