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Perl 5 hashes are flat: keys are strings and values are scalars. However, values may be references to arrays or other hashes, and the standard Perl 5 module Tie::RefHash enables hashes to be used with reference keys. A hash variable is marked by a % sigil, to distinguish it from scalar, array, and other data types.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Perl Data Language (abbreviated PDL) is a set of free software array programming extensions to the Perl programming language. PDL extends the data structures built into Perl, to include large multidimensional arrays , and adds functionality to manipulate those arrays as vector objects.
An example of server-side scripting using Perl, Plack and PSGI. Plack is a Perl web application programming framework inspired by Rack for Ruby and WSGI for Python, [1] [2] and it is the project behind the PSGI specification used by other frameworks such as Catalyst and Dancer. [3] Plack allows for testing of Perl web applications without a ...
a = [3, 1, 5, 7] // assign an array to the variable a a [0.. 1] // return the first two elements of a a [.. 1] // return the first two elements of a: the zero can be omitted a [2..] // return the element 3 till last one a [[0, 3]] // return the first and the fourth element of a a [[0, 3]] = [100, 200] // replace the first and the fourth element ...
Free on-line books about Perl. Practical Perl Programming – book by A.D. Marshall, Cardiff University; Modern Perl – free on-line book by chromatic; Picking up Perl – free on-line book by Bradley M. Kuhn and Neil Smyth; Impatient Perl – for readers with previous programming experience. Learn Perl in about a week.
The following list contains syntax examples of how a range of element of an array can be accessed. In the following table: first – the index of the first element in the slice; last – the index of the last element in the slice; end – one more than the index of last element in the slice; len – the length of the slice (= end - first)
The Perl Cookbook is written by Tom Christiansen and Nathan Torkington, and published by O'Reilly. The Perl Cookbook inspired the PLEAC (Programming Language Examples Alike Cookbook) website, which translated the code snippets in the Perl Cookbook into other languages: Python, Ruby, Guile, Tcl, Java, and beyond. O'Reilly went on to publish ...