Elon Musk在SXSW上的讲话

前两天看到Elon Musk在SXSW上的讲话，引用部分如下：

Life cannot just be about solving one miserable problem after another. That cannot be the only thing. They need to be things that inspire you, that make you glad to wake up in the morning and be part of humanity.

Elon Musk其人，六年前是极度轻视的。认为他想法过于保守，又自诩为理想主义者。然而六年过去了，大概自己成为了保守主义者，居然又开始崇敬起他来。

或者换句话说，六年前太过于幼稚，没有看到差距在哪里，而现在大概是发现了。

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想法

这次将网站从WordPress迁移到Hexo的时候，顺手一并把以前的中二文字给删除了，想着是希望给HR们留下一个好印象。然后最近可能RSS又被很多大佬给订阅了，讲道理这种瞎写的东西显然不适合继续发在这个地方。可是考虑到弄个公众号还是麻烦，而且我也从来不会去看我的Reeder里面的没一个未读消息，所以暂且就还是放在这里了。

我其实也不知道我写不写的完这篇文字，考虑到中文写作水平一年不如一年，前两天抽空想写点什么，结果也就继续躺在了草稿箱里，如果这篇文字最后写完了的话，看来这东西运气还是不错的，或者也许是我个人努力了一把…

more >>

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微信上的那些公众号

虽然一直知道很多公众号是拿钱办事或者为钱办事，但总觉得那几个业内著名公众号也许会为了自己未来钱途总会对自己的内容有所把关。直到近来目睹了如何将一个口胡出来的排行榜推上各大著名科技公众号的主推内容里，才恍然大悟为何这么多公众号能够每天发布一些看起来非常有道理的所谓干货。

痛定思痛，立马取关，新的一年，安静的自我学习 =-= 提升自我

乖巧.jpg

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How to Create Git Submodule Repo on Server

When I set up this website, I find I need to have some nested git repo hierarchy. For example, the theme always has an individual repo and I also put the entire hexo website in a git repo. To make this hierarchy more manageable, it is a good practice to add sub git repo as submodules.

If you are using git server such as github, then you are set by simply typing the commands to set up two git repo and push to remote server and then use

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git submodule add ./dir/to/submodule

to put everything not ignored to the server.

However, if you are using a git server set up by yourself, you may wonder how you should set the remote URLs for the main git repo and submodule git repo.

Instead of create two git repos in same directory to make the two repos for main and submodule are in the same level on server, we should create the server repos nested.

For example, if our main git repo named main, and our submodule repo named submodule, then we might need to perform the following actions and get the following hierarchies.

On Server:

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# go to needed dir
cd /dir/to/remote/server 
# init main repo on server
git init --bare main.git 
# get into main.git
cd main.git 
# init submodule repo on server
git init --bare submodule.git

On Local Machine with initial or developed codes:

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# get into directory and create file
cd main & touch readme.md
# init git repo locally
git init
# add remote repo
git remote add origin git@yourserver:/dir/to/remote/server/main.git 
# add modified file
git add readme.md
# commit first change
git commit -m "first commit"
# push change to remote server
git push origin master
# create local nested repo for submodule usage
mkdir submodule	
# create nested repo dir for submodule usage
cd submodule & touch readme.md
# init nested repo for submodule usage
git init
# add remote
git remote add origin git@yourserver:/dir/to/remote/server/main.git/submodule.git 
# modify file
git add readme.md	
# commit first modification in submodule
git commit -m "first submodule commit"		
# go back to main repo
cd ..
# add subomodule repo as submodule
git submodule add ./submodule	
# git add new submodule files and configs
git add ./submodule .gitmodule		
# commit this change
git commit -m "add submodule"
# push to git server
git push origin master

On another Local Machine which want to clone this repo:

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# clone a repo with all submoduel
git clone --recursive git@yourserver:/dir/to/remote/server/main.git

Then you will have a repo named main with submodule named submodule.

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How to Write Perl in Objective Oriented Way without Moose

Since I am new to perl and here are some notes for writing perl in OOP without using package without using Moose module.

It is recommended to include 

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use strict;
use warning;

at the very beginning of your code to make your code easier for others to read and understand.

So class in perl is basically a module. With the constructor subroutine and bless, it is easy to act like a class.

First of all, put your class in the file <classname>.pm . It is the module for the implementation of your class.

This module will have a constructor and some methods:

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package <classname>;

use strict;
use warning;

sub new {
    my ($self, $class, $arguments) = @_; 
    bless $self, $class;
    $self->init($arguments);
    return $self;
}

sub init {
    # initialize with $arguments
    # here is a example
    my ($self, $options) = @_;
    %{$self} = %{$options}
}

sub aMethod {
    #implementation of method here
}

1;

The constructor subroutine is not necessary to be named new.
In your perl file, after include this module with use <classname>;, you could create a new class instance in the following way and call its methods:

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my $instance = <classname> -> new ( \%args );
$instance -> aMethod ();

For above codes, an class instance is created by new ( \%args );. It returns a handler and store in $instance. Actually, it is a hash in perl. All subroutines can be called in the way of $classname -> subroutineName() like methods of class. All the attributes are stored in the hash, which is binded to $class by bless. You can directly access the attributes by $class -> {$key}, which is not recommended.

That is all about writing perl in OOP.

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How to Mask Multiple Keys in Swift 3

When you need to use CGEvent to create Quartz Event to mimic keyboard input for your macOS program, if you need to mimic the function of shift, control, command, option, then you need to set flag for CGEvent instance’s flag property. Meanwhile, if you want to set more than one flag, then you should or the rawvalue of flag together.

The example is shown here:

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let opt1d = CGEvent(keyboardEventSource: src, virtualKey: kVK_Option), keyDown: true)
let opt1u = CGEvent(keyboardEventSource: src, virtualKey: kVK_Option), keyDown: false)
let opt2d = CGEvent(keyboardEventSource: src, virtualKey: kVK_Command), keyDown: true)
let opt2u = CGEvent(keyboardEventSource: src, virtualKey: kVK_Command), keyDown: false)
let opt3d = CGEvent(keyboardEventSource: src, virtualKey: kVK_ANSI_D), keyDown: true)
let opt3u = CGEvent(keyboardEventSource: src, virtualKey: kVK_ANSI_D), keyDown: false)

var flagRaw : UInt64 = 0

switch keys[0] {
    case &quot;kVK_Command&quot;:
        flagRaw = CGEventFlags.maskCommand.rawValue
    case &quot;kVK_Shift&quot;:
        flagRaw = CGEventFlags.maskShift.rawValue
    case &quot;kVK_Control&quot;:
        flagRaw = CGEventFlags.maskControl.rawValue
    case &quot;kVK_Option&quot;:
        flagRaw = CGEventFlags.maskAlternate.rawValue
    default:
        break
    }
switch keys[1] {
    case &quot;kVK_Command&quot;:
        opt3d?.flags = CGEventFlags(rawValue: CGEventFlags.maskCommand.rawValue | flagRaw)
    case &quot;kVK_Shift&quot;:
        opt3d?.flags = CGEventFlags(rawValue: CGEventFlags.maskShift.rawValue | flagRaw)
    case &quot;kVK_Control&quot;:
        opt3d?.flags = CGEventFlags(rawValue: CGEventFlags.maskControl.rawValue | flagRaw)
    case &quot;kVK_Option&quot;:
        opt3d?.flags = CGEventFlags(rawValue: CGEventFlags.maskAlternate.rawValue | flagRaw)
    default:
        break
}

opt1d?.post(tap: loc)
opt2d?.post(tap: loc)
opt3d?.post(tap: loc)
opt3u?.post(tap: loc)
opt2u?.post(tap: loc)
opt1u?.post(tap: loc)

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”当好人袖手旁观时，邪恶就会胜利“

近来看了一本亚马逊的网播剧，_The Man in the High Castle_，想来也是高考以后除了GOT看的唯一一本美剧了，为其质量感叹的同时也决定为其做一个小评。额评论也称不上，毕竟是没有看过萝卜忑之卖基的_故事_，不过这书中文版已然买了许久让其积灰多月，自然也应该让我沾了些许评论的灵气吧。。 more >>

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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true