Most commonly used functions in Perl script programming

Below are some of the most commonly used functions in Perl script programming. This is not meant to be a reference manual; to get the format you can use the man perl command:<br /><br /><br />Los enlaces son solo para miembros. Registrate o iniciá sesión<br /><br /><br />abs: returns the absolute value of the given expression.<br />chmod: changes the permissions of the given files.<br />chop: trims and returns the last character of a string.<br />chown: changes the owner of the given files.<br />close : closes a file.<br />cos: returns the cosine of the given angle in radians.<br />defined: used to check whether a variable, format, subroutine, etc. exists.<br />delete: deletes a value from an associative array via its key.<br />die: prints a message passed as a parameter to standard error output when an error occurs while executing a statement.<br />eof: returns true if at the end of the given file.<br />eval: evaluates the given expression as if it were a small Perl program.<br />exec: executes whatever we pass as a parameter and exits the program.<br />exit: makes us exit the Perl script, returning the value passed as an argument to the operating system.<br />exp: returns the number e raised to the power passed as a parameter.<br />fileno: returns the descriptor of the file handle passed as a parameter.<br />fork: makes a fork call.<br />getc: reads the next character from the specified file.<br />hex: returns the decimal value of the hexadecimal number passed as a parameter.<br />index: returns the position of the first occurrence of one string within another.<br />int: returns the integer part of the parameter passed.<br />join: joins the strings passed as arguments with a separator also passed as an argument.<br />keys: returns all the keys of an associative array.<br />length: returns the length in characters of the parameter passed.<br />local: declares the variables passed as arguments as local.<br />log: returns the logarithm of the given number.<br />mkdir: creates a directory at the given path.<br />oct: returns the decimal value of the octal number passed as a parameter.<br />open: opens the given file, associating it with a file handle also specified as a parameter.<br />pop: returns and removes the last element of the given array.<br />print: displays the given expression on standard output or in the specified file.<br />push: adds the given value to the end of the array passed as a parameter.<br />rand: returns a random number between 0 and the value passed as an argument.<br />read: reads a certain number of characters from the file passed as an argument.<br />rename: used to rename a file.<br />require: used to include external code in our script.<br />return: returns a value from a subroutine.<br />rmdir: deletes a directory.<br />seek: positions a file pointer at a given location.<br />select: used to select the file handle that will be used by default for the output of commands or functions that do not specify a particular file handle as a parameter.<br />shift: returns the first value of the given array, then removes it.<br />sin: returns the sine of the given angle in radians.<br />sleep: causes the Perl script to pause for the specified number of seconds.<br />sort: sorts the given array.<br />split: splits a string into substrings according to the specified separator.<br />sqrt: returns the square root of the given number.<br />system: same as exec but does not exit the Perl script.<br />tell: returns the current position of the file pointer of the specified file handle.<br />values: returns all the values of the given associative array.<br />write: writes a formatted record to the file associated with that format.<br /><br />I hope this helps, regards.<br /><br /><br />Source:Perl-rules.mx