Designing Games with Game Maker - YoYo Games

string_copy(str,index,count) Returns a substring of str, starting at
position index, and of length count.
string_char_at(str,index) Returns the character in str at position index.
string_delete(str,index,count) Returns a copy of str with the part
removed that starts at position index and has length count.
string_insert(substr,str,index) Returns a copy of str with substr
added at position index.
string_replace(str,substr,newstr) Returns a copy of str with the first
occurrence of substr replaced by newstr.
string_replace_all(str,substr,newstr) Returns a copy of str with all
occurrences of substr replaced by newstr.
string_count(substr,str) Returns the number of occurrences of substr
in str.
string_lower(str) Returns a lowercase copy of str.
string_upper(str) Returns an uppercase copy of str.
string_repeat(str,count) Returns a string consisting of count copies of
str.
string_letters(str) Returns a string that only contains the letters in str.
string_digits(str) Returns a string that only contains the digits in str.
string_lettersdigits(str) Returns a string that contains the letters and
digits in str.
The following functions deal with the clipboard for storing text.
clipboard_has_text() Returns whether there is any text on the clipboard.
clipboard_get_text() Returns the current text on the clipboard.
clipboard_set_text(str) Sets the string str on the clipboard.
Dealing with dates and time
In Game Maker there are a number of functions to deal with dates and time. A date-time
combination is stored in a real number. The integral part of a date-time value is the number of
days that have passed since 12/30/1899. The fractional part of the date-time value is fraction
of a 24 hour day that has elapsed. The following functions exist:
date_current_datetime() Returns the date-time value that corresponds
to the current moment.