What is a Here Document? An Easy-to-Understand Explanation of the Basic Concepts of String Manipulation in Programming Languages
String manipulation is a fundamental aspect of programming languages that allows developers to work with and manipulate text data. One popular feature in many programming languages, including Perl, Bash, Ruby, and PHP, is the use of a “here document.” But what exactly is a here document and how does it work?
A here document, also known as a heredoc or here-script, is a convenient way to define a multiline string. It allows the inclusion of large blocks of text or structured data without the need for cumbersome escaping or concatenation. It provides a cleaner and more readable way to define and manipulate textual content within a program.
In most programming languages, a here document is denoted by a special syntax that marks the beginning and end of the document. Typically, it starts with the << (less than, less than) followed by a unique identifier or delimiter, which indicates the end of the document. The identifier can be any string of characters, but it is recommended to choose a meaningful and descriptive one. Here's an example in Perl: ```perl
my $text = < [Google Chrome] The definitive solution for right-click translations that no longer come up.Read also