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  2. Perl control structures - Wikipedia

    en.wikipedia.org/wiki/Perl_control_structures

    Perl provides three loop control keywords that all accept an optional loop label as an argument. If no label is specified, the keywords act on the innermost loop. Within nested loops, the use of labels enables control to move from an inner loop to an outer one, or out of the outer loop altogether.

  3. Perl language structure - Wikipedia

    en.wikipedia.org/wiki/Perl_language_structure

    The number of elements in an array can be determined either by evaluating the array in scalar context or with the help of the $# sigil. The latter gives the index of the last element in the array, not the number of elements. The expressions scalar(@array) and ($#array + 1) are equivalent.

  4. Thread-local storage - Wikipedia

    en.wikipedia.org/wiki/Thread-local_storage

    In Perl threads were added late in the evolution of the language, after a large body of extant code was already present on the Comprehensive Perl Archive Network (CPAN). Thus, threads in Perl by default take their own local storage for all variables, to minimise the impact of threads on extant non-thread-aware code.

  5. Nested function - Wikipedia

    en.wikipedia.org/wiki/Nested_function

    In computer programming, a nested function (or nested procedure or subroutine) is a named function that is defined within another, enclosing, block and is lexically scoped within the enclosing block – meaning it is only callable by name within the body of the enclosing block and can use identifiers declared in outer blocks, including outer ...

  6. Fat comma - Wikipedia

    en.wikipedia.org/wiki/Fat_comma

    It is primarily associated with PHP, Ruby and Perl programming languages, which use it to declare hashes. Using a fat comma to bind key-value pairs in a hash, instead of using a comma, is considered an example of good idiomatic Perl. [1] In CoffeeScript and TypeScript, the fat comma is used to declare a function that is bound to this. [2] [3]

  7. Comparison of programming languages (associative array)

    en.wikipedia.org/wiki/Comparison_of_programming...

    Perl 5 has built-in, language-level support for associative arrays. Modern Perl refers to associative arrays as hashes; the term associative array is found in older documentation but is considered somewhat archaic. Perl 5 hashes are flat: keys are strings and values are scalars.

  8. Firstrade to offer overnight trading, joins growing list of ...

    www.aol.com/news/firstrade-offer-overnight...

    Online brokerage Firstrade plans to launch overnight trading in early 2025, the latest firm looking to offer retail clients the chance to trade US stocks and exchange-traded funds outside of ...

  9. Comparison of programming languages (basic instructions)

    en.wikipedia.org/wiki/Comparison_of_programming...

    ^d Although Perl doesn't have records, because Perl's type system allows different data types to be in an array, "hashes" (associative arrays) that don't have a variable index would effectively be the same as records. ^e Enumerations in this language are algebraic types with only nullary constructors