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  2. CodePen - Wikipedia

    en.wikipedia.org/wiki/CodePen

    CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets. It functions as an online code editor and open-source learning environment, where developers can create code snippets, called "pens," and test them. It was founded in 2012 by full-stack developers Alex Vazquez and Tim Sabat and front ...

  3. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  4. W3C Markup Validation Service - Wikipedia

    en.wikipedia.org/wiki/W3C_Markup_Validation_Service

    W3C Markup Validation Service. The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.

  5. Codependency Symptoms: Examples, Causes, Getting Support

    www.healthline.com/health/mental-health/...

    Codependency describes a pattern where your life revolves around someone else’s wants and needs. You might consider yourself as that person’s carer, helper, emotional rock, or guardian angel ...

  6. The term “nonbinary” tells you something about who a person is — not about what they might look like. Nonbinary people can have presentations and expressions that are: gender conforming ...

  7. Data validation - Wikipedia

    en.wikipedia.org/wiki/Data_validation

    Overview. Data validation is intended to provide certain well-defined guarantees for fitness and consistency of data in an application or automated system. Data validation rules can be defined and designed using various methodologies, and be deployed in various contexts. [1] Their implementation can use declarative data integrity rules, or ...

  8. Concerta vs. Adderall: A Side-by-Side Comparison - Healthline

    www.healthline.com/health/adhd/concerta-adderall

    The generic form of Concerta is methylphenidate. Adderall is a mixture of four different “amphetamine” salts mixed together to create a 3 to 1 ratio of dextroamphetamine and levoamphetamine.

  9. Male Masturbation: 5 Things You Didn't Know - WebMD

    www.webmd.com/men/male-masturbation-5-things-you...

    1. Masturbation doesn't have the health benefits that sex does. 2. Masturbation is not risk-free. 3. There's no "normal" amount of masturbation. 4. Masturbating doesn't reflect on your ...