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[Diffen] Inner Join vs Outer Join - Difference and Comparison
An inner join finds and returns matching data from tables, while an outer join finds and returns matching data and some dissimilar data from tables.
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2 days ago by jslu
[經理人] 這樣拒絕老闆才高明!3 個聰明技巧,幫你駁回上司要求
反駁一個不好的方案,最不傷和氣的說法是:「我是願意,可是做起來,要付多少錢?」你也可以說:「這件事情我們也願意推進,只是成本有點高,您看怎麼辦呢?」「這件事情的成本就是這樣,是否要繼續推進您來決定。」
... 我們站在老闆的角度想一想:下屬說「不」,唯一的正當理由就是這件事本身划不來,而下屬難免有偷懶的嫌疑,所以必須有翔實的論據表明這件事真的就是成本太高,才能打消老闆的懷疑。
@Article  @HOWTO  Relationship  Career  ROI  Investment  CostDown  ValuationAndValueAdding  Decision-making  Tutorial  Tip 
13 days ago by jslu
[Docker Pirates ARMed with explosive stuff] Docker Sensor Fu on a Raspberry Pi
For many people it comes as a surprise that one can access all the hardware of an IoT device from within a Docker container. ... So why is this so exciting? Well, it basically allows us to deploy our sensor reading software easily and reliably to every device that is running a Docker Engine. No installation hassle. No dependency hell.
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17 days ago by jslu
[TechRepublic] How to install and use eCryptfs on Ubuntu
mount an encrypted file system, use it, and unmount it. Once unmounted, the data contained within the file system cannot be read.
@Article  @HOWTO  Unix  FileManagement  Security  Privacy  Software  Tutorial 
4 weeks ago by jslu
[Pat Shaughnessy] Don’t be terrified of building native extensions!
The first step, shown at the top, is to run a Ruby script called “extconf.rb.” This is included in the ext/[GEMNAME] folder by the Ruby gem author, and is responsible for generating the C Makefile used in the next step. Extconf.rb inspects your laptop or server to find out what platform you have, what type of C compiler you have, which libraries are present and where they are located.. the gem author needs to write extconf.rb properly to guarantee this is always the case.</blockquote...
@Article  @HOWTO  @Example  Ruby  Software  Programming  Language  Plug-in  EncapsulationAndDecoupling  Tutorial  CrossPlatform 
5 weeks ago by jslu
[Ruby Journal] How to write custom serializer for ActiveRecord#serialize
remember that serialze takes the serializer class name as the second argument, and the serializer must have 2 methods `load` and `dump`.
@Article  @HOWTO  @Example  Ruby  WebApp  Software  Framework 
7 weeks ago by jslu
Ruby Pattern: Extend through Include - Dan Manges's Blog
Ruby modules can be mixed into a class two ways. The first way is to include the module in the class, making all methods in the module available in the class. Also, a class can extend itself by using a module. (Actually, any object can use a module for extension). However, the majority of the time modules are used with classes, they are included, not extended.
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8 weeks ago by jslu
[映畫手民] 《金牌特務》:牛津鞋與雕花鞋的學問
為何「Oxford not Brogues」不能說成「牛津鞋不是雕花鞋」呢?皆因牛津鞋和雕花鞋實情並無抵觸,是樣式和花式的組合,可以同時並存。只要到一般皮鞋專門店都可以買到一雙Oxford Brogues(牛津雕花鞋),當然如果你是戲中的特務,這樣穿著執行任務會不合格,但非執勤期間,去畢業典禮或朋友婚宴,這樣穿問題不大。牛津鞋可以是雕花鞋,而雕花鞋事實上同樣可以是牛津鞋,電影中那句「Oxford not Brogues」的意思,其實應該是指「牛津鞋不等於(not)雕花鞋」,而不是「牛津鞋不是(not)雕花鞋」。
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8 weeks ago by jslu
What Is The Best Way To Break A Plateau?
There are plenty of reasons why you might be experiencing a plateau. The first step to smashing through it is to diagnose what is causing it. Let's go over some of the common causes and their solutions.
@Article  @HOWTO  Health  Food  Tutorial  HabitRoutineAndPattern 
8 weeks ago by jslu
[關鍵評論網] 唐鳳擅長的焦點討論法,正是公關與網路應答技巧的好典範
焦點討論法是在2005年由加拿大發明的一套方法(ORID),簡單來說,就是用對的順序,問對的問題,來節省至少1/3的溝通時間。 ... 我們在網路上很常看見只有「主觀想法」(I)的留言, 因此,焦點討論法就是要引導對方把缺的(O)跟(R)補上,往上一步驟去問問是怎麼樣的感受讓他有這樣的建議,在得知他是否跟我們是擁有一樣的資訊與事實。...通常在事實(O)與感受(R)已經在同一陣線上時,後面的溝通就會是順利的了
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8 weeks ago by jslu
[Investopedia] Initial Coin Offering (ICO)
An unregulated means by which funds are raised for a new cryptocurrency venture. An Initial Coin Offering (ICO) is used by startups to bypass the rigorous and regulated capital-raising process required by venture capitalists or banks. In an ICO campaign, a percentage of the cryptocurrency is sold to early backers of the project in exchange for legal tender or other cryptocurrencies, but usually for Bitcoin.
@Article  @Concept  Investment  Currency  Funding  CrowdSourcing  @Comparison 
8 weeks ago by jslu
[Russell Keith-Magee] Autopsy of a slow train wreck
despite the fact that failure happens all the time, we don't talk about it. We don't talk about why things fail. And as a result, many of the same lessons have to be learned over and over again. Those that experience failure often feel like they're doing it alone, because of the significant social stigma associated with failure.
@Article  @Story  Entrepreneurship  LearningFromFailure  Business  PEnVC  Software  WebApp  DistributionChannel 
8 weeks ago by jslu
For worriers, expressive writing cools brain on stressful tasks | MSUToday | Michigan State University
Worrying takes up cognitive resources; it’s kind of like people who struggle with worry are constantly multitasking – they are doing one task and trying to monitor and suppress their worries at the same time. Our findings show that if you get these worries out of your head through expressive writing, those cognitive resources are freed up to work toward the task you’re completing and you become more efficient.
@Article  @Research  @HOWTO  Productivity  Psychology  Feeling  Writing  InnerPeace  Brain  CognitiveScience  Tip 
8 weeks ago by jslu

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