How do I sleep in a Perl script?

Perl | sleep() Function sleep() function in Perl is an inbuilt function which is used to delay the execution of the current script for a specified number of seconds or forever if parameter is not specified. The sleep( ) function accepts seconds as a parameter and returns the same on success.

What is regex Perl?

Regular Expression (Regex or Regexp or RE) in Perl is a special text string for describing a search pattern within a given text. Regex in Perl is linked to the host language and is not the same as in PHP, Python, etc. Sometimes it is termed as “Perl 5 Compatible Regular Expressions“.

What does <=> mean in Perl?

18. From Perldoc: Binary “<=>” returns -1, 0, or 1 depending on whether the left argument is numerically less than, equal to, or greater than the right argument. If your platform supports NaNs (not-a-numbers) as numeric values, using them with “<=>” returns undef.

What is =~ in regex?

=~ is Ruby’s basic pattern-matching operator. When one operand is a regular expression and the other is a string then the regular expression is used as a pattern to match against the string. (This operator is equivalently defined by Regexp and String so the order of String and Regexp do not matter.

What is the syntax for regular expressions in Perl?

The syntax of regular expressions in Perl is very similar to what you will find within other regular expression.supporting programs, such as sed, grep, and awk. The basic method for applying a regular expression is to use the pattern binding operators =~ and ! ~.

What is the use of sleep function in Perl?

sleep () function in Perl is an inbuilt function which is used to delay the execution of the current script for a specified number of seconds or forever if parameter is not specified. The sleep ( ) function accepts seconds as a parameter and returns the same on success. Syntax: sleep (seconds)

How do you read repetition in Perl?

Read repetition as any of the repetition expressions listed above it. Shortest match means that the shortest string matching the pattern is taken. The default is “greedy matching” , which finds the longest match. The repetition? construct was introduced in Perl version 5. Character sets: specialities inside [ …]

What is the sleep() function in JavaScript?

The sleep ( ) function accepts seconds as a parameter and returns the same on success. Writing code in comment? Please use ide.geeksforgeeks.org , generate link and share the link here.