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Dart optimizes the compiled JavaScript output to avoid expensive checks and operations. This results in JavaScript code that can run faster than equivalent code handwritten in plain JavaScript. [33] The first Dart-to-JavaScript compiler was dartc. It was deprecated in Dart 2.0. The second Dart-to-JavaScript compiler was frog. [34]
Rest parameters are similar to Javascript's arguments object, which is an array-like object that contains all of the parameters (named and unnamed) in the current function call. Unlike arguments , however, rest parameters are true Array objects, so methods such as .slice() and .sort() can be used on them directly.
The Closure Compiler Service application provides a form for a user to input a URL pointing to a JavaScript source or enter JavaScript source code in a text box. The website will display the compiled JavaScript on the right side for the user to copy. [8] An API is available, accessible via POST requests, parameters include:
Dart includes dart:ffi [10] library to call native C code for mobile, command-line, and server applications; Dynamic programming languages, such as Python, Perl, Tcl, and Ruby, all provide easy access to native code written in C, C++, or any other language obeying C/C++ calling conventions.
The Ruby on Rails framework used to implement a Domain-specific language named RJS, which can be used to write Ruby code that generates Javascript code. The code generated by RJS was usually loaded using Ajax, e.g. by using Ajax-enabled helper methods Ruby on Rails provides, such as the link_to_remote helper.
In Raku, a sister language to Perl, for must be used to traverse elements of a list (foreach is not allowed). The expression which denotes the collection to loop over is evaluated in list-context, but not flattened by default, and each item of the resulting list is, in turn, aliased to the loop variable(s). List literal example:
Protocol Buffers (Protobuf) is a free and open-source cross-platform data format used to serialize structured data. It is useful in developing programs that communicate with each other over a network or for storing data.
Dart imposes the syntactic rule that non-local identifiers beginning with an underscore (_) are treated as private (since the language does not have explicit keywords for public or private access). Additionally, source file names do not follow Java's "one public class per source file, name must match" rule, instead using snake_case for filenames.