F$ELEMENT(): Difference between revisions
Jump to navigation
Jump to search
Added a note and example in regards to the return value when the element doesn't exist |
m →Example |
||
| (One intermediate revision by the same user not shown) | |||
| Line 8: | Line 8: | ||
'''String''' is the string containing the element. | '''String''' is the string containing the element. | ||
If the | If the selected element does not exist in the string, the delimiter character is returned. | ||
=Example= | =Example= | ||
| Line 20: | Line 20: | ||
$ EIGHTH_DAY = F$ELEMENT(7,"/",DAY_LIST) !non-existent element | $ EIGHTH_DAY = F$ELEMENT(7,"/",DAY_LIST) !non-existent element | ||
$ SHOW SYM EIGHTH_DAY | $ SHOW SYM EIGHTH_DAY | ||
EIGHTH_DAY = "/" | |||
</nowiki> | </nowiki> | ||
Latest revision as of 12:48, 6 September 2019
F$ELEMENT() is a lexical function that extracts one element from a string of elements. It can be used, among other things, to emulate arrays in DCL.
Format
F$ELEMENT(element-number, delimiter, string)
Element numbers range from 0 to F$LENGTH(string). Delimiter is the character used to delimit the elements in the string. For example, in "JAN/MAR/APR/MAY", the delimiter is "/", and in "John Doe", the delimiter is " ". String is the string containing the element.
If the selected element does not exist in the string, the delimiter character is returned.
Example
$ DAY_LIST = "MON/TUE/WED/THU/FRI/SAT/SUN" $ MONDAY = F$ELEMENT(0,"/",DAY_LIST) $ SHOW SYM MONDAY MONDAY = "MON" $ EIGHTH_DAY = F$ELEMENT(7,"/",DAY_LIST) !non-existent element $ SHOW SYM EIGHTH_DAY EIGHTH_DAY = "/"