Developers trying to jump from one
language to another often hit the same wall: How do I do this? They can do it in their base language, but introduce them to a strange new world, and the going gets rough.
Programmers in this sticky position often benefit from seeing how the
same concepts, designs, and algorithms can be implemented in parallel
across multiple languages. Here are five sites that feature examples of
how the most popular languages -- and a few you might not know -- tackle
the same commands so very differently.
Rosetta Code
Easily the largest, most robustly annotated, and consistently useful site of its kind,
Rosetta Code
is described as a "
programming chrestomathy" -- a repository of
examples for how to accomplish the same tasks in many programming
languages. Most remarkable about Rosetta Code is not the sheer size of
the site and the number of examples, but the granularity of the
examples.
Creating a window in a GUI,
for instance, isn't annotated by language, but by specific toolkits
within that language; take Python, with examples for Tkinter, PyGTK,
Pythonwin, wxPython, and many other libraries.
Eqcode
Eqcode
aims to show "equivalent codes for all languages," so it provides an
index of common languages with drill-downs to specific concepts or
tasks, such as removing a specific element from an array or constructing
a regex to match an email address. The breadth of languages is decent,
but the concepts addressed are somewhat scattershot, and it isn't
updated often; the last updates were in April 2014.
CrossWise
Like the other sites here,
CrossWise
lets you see how
multiple languages -- in this case, JavaScript, PHP,
Ruby, and Python -- implement the same concepts. But the site design is
undeniably ingenious: The comparisons are placed side by side in two
columns, and you can choose which language examples to place in what
column. CrossWise covers such details as how Boolean logic (the concepts
of truth or falsehood) are implemented in each, or error handling and
exceptions.
AlgPedia
An ambitious project created by Universidade Federal do Rio de Janerio in Brazil,
AlgPedia
is a collaborate encyclopedia that focuses on implementations of
algorithms. Sorting, checksumming, arbitrary precision, data mining,
pattern matching, and many other categories of algorithms are all
included. The project is still in its early stages, so the coverage of
algorithms and the types of examples provided are somewhat incomplete;
most of them have only one or two examples.
PLEAC (Programming Language Examples Alike Cookbook)
Perl is noted for the Perl Cookbook, which documents common programming problems and their solutions for the language.
PLEAC
is an attempt to take the problems posed in the Cookbook and produce
solutions for them in nearly every other language in use. Perl, Groovy,
Python, OCaml, and Ruby have the best coverage of solutions so far, but
stubs and partial entries for lots of other languages are also included.
Interestingly, JavaScript is not among them, but a stub entry for
CoffeeScript is. As with many of the others here, you're welcome to contribute if your favorite language is underrepresented.
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