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#+-| 15.3.7 |------------------------+########################################
#| +--------+ String Functions Table |########################################
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####| The string functions are designed to work on strings with a maximum |###
####| length of 254 characters.  The maximum storage space created for a  |###
####| string is 255 characters, including one for the implied NULL char.  |###
####| The string functions do not test for overrun.                       |###
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##+--| Function |------------| Usage |-------------------------------------+##
##| asc ............... Returns the numeric ASCII value of the first       |##
##|                     character of a string.                             |##
##| at ................ Returns position of string within string.          |##
##| capsfirst ......... Makes first letter of any word uppercase.          |##
##| center ............ Centers the string within specified width.         |##
##| chr ............... Converts a byte to a character.                    |##
##| fill .............. Draws a box, fills the box with a character        |##
##|                     and optionally shadows the box.                    |##
##| i_str ............. Converts an integer to a character string.         |##
##| i_val ............. Converts character string to an integer.           |##
##| isalpha ........... Tests if string begins with "A"-"Z" or "a"-"z".    |##
##| islower ........... Tests if first string character is lowercase.      |##
##| isupper ........... Tests if first string character is uppercase.      |##
##| left .............. Returns specified number of characters             |##
##|                     from start of string.                              |##
##| len ............... Returns length of string.                          |##
##| lower ............. Converts uppercase characters to lower.            |##
##| ltrim ............. Removes leading blanks from string.                |##
##| rat ............... Returns position of string within a string,        |##
##|                     starting from the right most character.            |##
##| replicate ......... Returns a string comprised of another string       |##
##|                     repeated N times.                                  |##
##| right ............. Returns a string of specified length starting      |##
##|                     at the end of the string.                          |##
##| rtrim ............. Removes trailing blanks.                           |##
##| space ............. Returns a string of specified length, filled       |##
##|                     with blank spaces.                                 |##
##| squish ............ Removes spaces and tabs from a string.  Converts   |##
##|                     all upper case characters to lower case.           |##
##| str ............... Converts a double-precision expression to          |##
##|                     a character string.                                |##
##| stuff ............. Inserts and/or removes a portion of a string.      |##
##| substr ............ Returns specified subset of character string.      |##
##| trim .............. Removes leading and trailing blanks from a string. |##
##| upper ............. Converts lowercase characters to uppercase.        |##
##| val ............... Converts an ASCII string to a formatted            |##
##|                     double-precision number.                           |##
##| wild_equal ........ performs a wild-card matching on a string.         |##
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