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  2. Exception handling syntax - Wikipedia

    en.wikipedia.org/wiki/Exception_handling_syntax

    The Perl mechanism for exception handling uses die to throw an exception when wrapped inside an eval {...}; block. After the eval, the special variable $@ contains the value passed from die. Perl 5.005 added the ability to throw objects as well as strings. This allows better introspection and handling of types of exceptions.

  3. Exception handling - Wikipedia

    en.wikipedia.org/wiki/Exception_handling

    The first hardware exception handling was found in the UNIVAC I from 1951. Arithmetic overflow executed two instructions at address 0 which could transfer control or fix up the result. [16] Software exception handling developed in the 1960s and 1970s. Exception handling was subsequently widely adopted by many programming languages from the ...

  4. Error hiding - Wikipedia

    en.wikipedia.org/wiki/Error_hiding

    Handling errors in this manner is considered bad practice [1] and an anti-pattern in computer programming. In languages with exception handling support, this practice is called exception swallowing. Errors and exceptions have several purposes:

  5. JavaScript syntax - Wikipedia

    en.wikipedia.org/wiki/JavaScript_syntax

    var x1 = 0; // A global variable, because it is not in any function let x2 = 0; // Also global, this time because it is not in any block function f {var z = 'foxes', r = 'birds'; // 2 local variables m = 'fish'; // global, because it wasn't declared anywhere before function child {var r = 'monkeys'; // This variable is local and does not affect the "birds" r of the parent function. z ...

  6. Exception handling (programming) - Wikipedia

    en.wikipedia.org/wiki/Exception_handling...

    The implementation of exception handling in programming languages typically involves a fair amount of support from both a code generator and the runtime system accompanying a compiler. (It was the addition of exception handling to C++ that ended the useful lifetime of the original C++ compiler, Cfront. [18]) Two schemes are most common.

  7. Wrapper function - Wikipedia

    en.wikipedia.org/wiki/Wrapper_function

    A helper function is a function which groups parts of computation by assigning descriptive names and allowing for the reuse of the computations. [6] Although not all wrappers are helper functions, all helper functions are wrappers, and a notable use of helper functions—grouping frequently utilized operations—is in dynamic binary translation, in which helper functions of a particular ...

  8. XML - Wikipedia

    en.wikipedia.org/wiki/Xml

    The World Wide Web Consortium's XML 1.0 Specification [3] of 1998 [4] and several other related specifications [5] —all of them free open standards—define XML. [6] The design goals of XML emphasize simplicity, generality, and usability across the Internet. [7] It is a textual data format with strong support via Unicode for different human ...

  9. DOM event - Wikipedia

    en.wikipedia.org/wiki/DOM_event

    There is a huge collection of events that can be generated by most element nodes: Mouse events. [3] [4]Keyboard events.; HTML frame/object events. HTML form events. User interface events.