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  2. Elvis operator - Wikipedia

    en.wikipedia.org/wiki/Elvis_operator

    In certain computer programming languages, the Elvis operator, often written ?:, is a binary operator that returns the evaluated first operand if that operand evaluates to a value likened to logically true (according to a language-dependent convention, in other words, a truthy value), and otherwise returns the evaluated second operand (in which case the first operand evaluated to a value ...

  3. Wikipedia:Reporting JavaScript errors - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Reporting...

    Google Chrome DevTools, Console tab The "triangle" can be clicked to reveal some hidden info.. Click on the "Console" tab; Scroll to the bottom of the console and look for log entries in yellow and red.

  4. Exception handling - Wikipedia

    en.wikipedia.org/wiki/Exception_handling

    Common exceptions include an invalid argument (e.g. value is outside of the domain of a function), [5] an unavailable resource (like a missing file, [6] a network drive error, [7] or out-of-memory errors [8]), or that the routine has detected a normal condition that requires special handling, e.g., attention, end of file. [9]

  5. JavaScript - Wikipedia

    en.wikipedia.org/wiki/JavaScript

    This is an accepted version of this page This is the latest accepted revision, reviewed on 2 February 2025. High-level programming language Not to be confused with Java (programming language), Javanese script, or ECMAScript. JavaScript Screenshot of JavaScript source code Paradigm Multi-paradigm: event-driven, functional, imperative, procedural, object-oriented Designed by Brendan Eich of ...

  6. Type safety - Wikipedia

    en.wikipedia.org/wiki/Type_safety

    In computer science, type safety and type soundness are the extent to which a programming language discourages or prevents type errors.Type safety is sometimes alternatively considered to be a property of facilities of a computer language; that is, some facilities are type-safe and their usage will not result in type errors, while other facilities in the same language may be type-unsafe and a ...

  7. Type system - Wikipedia

    en.wikipedia.org/wiki/Type_system

    The process of verifying and enforcing the constraints of types—type checking—may occur at compile time (a static check) or at run-time (a dynamic check). If a language specification requires its typing rules strongly, more or less allowing only those automatic type conversions that do not lose information, one can refer to the process as strongly typed; if not, as weakly typed.

  8. COBOL - Wikipedia

    en.wikipedia.org/wiki/COBOL

    VALIDATE, which validates and distributes data as specified in an item's description in the data division. STRING and UNSTRING, which concatenate and split strings, respectively. INSPECT, which tallies or replaces instances of specified substrings within a string. SEARCH, which searches a table for the first entry satisfying a condition.

  9. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.