Introduction

This subsection describes various functions to search for set patterns and extract subsets from sets.

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Procedures and Functions Provided:

length [set function]:
    length

find [set function]:
    find
    find ignore blanks
    find ignore both
    find ignore case

left [set function]:
    left
    left include
    left last match
    left last match include

right [set function]:
    right
    right include
    right last match
    right last match include

middle [set function]:
    middle
    middle include
    middle until
    middle until include

outside [set function]:
    outside
    outside exclude
    outside until
    outside until exclude

trim [set function]:
    trim

Count elements in sets:
    count elements
    count elements ignore blanks
    count elements ignore both
    count elements ignore case

Subsets from sets:
    subset
    subset ignore blanks
    subset ignore both
    subset ignore case
    subset recursive
    subset recursive ignore blanks
    subset recursive ignore both
    subset recursive ignore case
    filter
    filter 1
    filter n
    filter start
    filter start include
    filter start n
    filter start n include
    filter stop
    filter stop include