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Categories / Perl / String

 

Perl 5 String Functions

Function          Syntax                                                        Description chomp             chomp($scalar);                                               Removes only a newline character from the end of a string chop              chop($scalar);                                                Removes the last character of each element of the input list chr               chr(number);                                                  Translates a number into a character index             index(searchString, substring, beginningSearchPosition);      Returns the first position of a substring join              join(delimiter, list);                                        Creates a single delineated string from an input list lc                lc(expression);                                               Changes all the characters in the expression to lowercase lcfirst           lcfirst(expression);                                          Changes only the first character of the expression to lowercase length            length(expression);                                           Returns the number of characters in a string ord               ord(expression);                                              Converts ASCII characters into their numeric value pack              pack TEMPLATE, inputList;                                     Takes one or more character codes and translates the corresponding character(s) to the format specified rindex            rindex (searchString, substring, startPosition);              Returns the last position of a substring split             split(/pattern/,expression, maxSplit);                        Separates the expression into parts s/(substitute)    $searchString =~ s/oldPattern/newPattern/;                    Substitutes one string for another string substr            substr(expression,startingPosition,length);                   Returns or modifies a substring tr (translate)    $input =~ tr/searchString/replacementString/                  Exchanges each occurrence of a character in the search string with its matching character in the replacement string uc                uc(expression);                                               Changes all the characters in the expression to uppercase ucfirst           ucfirst(expression);                                          Changes only the first character of the expression to uppercase