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Reference · stzList

TypesAndTheirSections()

TypesAndTheirSections (alias TypesZZ): group the list into maximal -- runs of one type, then collect, per distinct type, the [start,end] -- position ranges of its runs. e.g. [1,2,"A",3] -> -- [ ["NUMBER",[[1,2],[4,4]]], ["STRING",[[3,3]]] ].

Basic examples (1)

Softanza
o1 = new stzList([
	1, 2, 3,
	"A", "B", "C",
	7, 8,
	1:3, 4:8, 9:12,
	"D", "E",
	4:8,
	11, 12,
	NullObject(),
	TrueObject(),
	FalseObject()
])
? o1.TypesU()
? @@XT( o1.ItemsAndTheirTypes(), NL, TAB )
? @@XT( o1.TypesAndTheirSections(), NL, TAB ) # same as TypesZZ()
Output
NUMBER
STRING
LIST
OBJECT

[
	[ 1, "NUMBER" ],
	[ 2, "NUMBER" ],
	[ 3, "NUMBER" ],
	[ "A", "STRING" ],
	[ "B", "STRING" ],
	[ "C", "STRING" ],
	[ 7, "NUMBER" ],
	[ 8, "NUMBER" ],
	[ [ 1, 2, 3 ], "LIST" ],
	[ [ 4, 5, 6, 7, 8 ], "LIST" ],
	[ [ 9, 10, 11, 12 ], "LIST" ],
	[ "D", "STRING" ],
	[ "E", "STRING" ],
	[ [ 4, 5, 6, 7, 8 ], "LIST" ],
	[ 11, "NUMBER" ],
	[ 12, "NUMBER" ],
	[ @nullobject, "OBJECT" ],
	[ @trueobject, "OBJECT" ],
	[ @falseobject, "OBJECT" ]
	]
[
	[ "NUMBER", [ [ 1, 3 ], [ 7, 8 ], [ 15, 16 ] ] ],
	[ "STRING", [ [ 4, 6 ], [ 12, 13 ] ] ],
	[ "LIST", [ [ 9, 11 ], [ 14, 14 ] ] ],
	[ "OBJECT", [ [ 17, 19 ] ] ]
	]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 31_typesu.ring(opens in a new tab)

The extensions of this method

Each extension, and whether it exists for this method; an extension that exists combines with the others (FindSTCS).

Extension
Exists
What it adds · The names
Q
yes
does what the method does, then returns the object, so the call can be chained · TypesAndTheirSectionsQ
QQ
no
chains on the next, more specific type of object (the Q ladder)
QQQ
no
chains on the most specific type of object (the Q ladder)
QRT
no
returns the result as an object of the requested type
CS
no
takes a case-sensitivity flag
ST
no
takes the position to start from (StartingAt)
IB
no
takes bounds that are included (IncludingBounds)
XT
no
the extended form: more parameters than the base method
XTT
no
yet another extension: a further extended form, after XT
Z
no
includes the position in what it returns
ZZ
no
returns positions as sections, [start, end]
W
no
selects by a condition
WF
no
selects by a condition, with the expressive keywords (@NextItem, @PreviousItem...)
D
no
takes a direction, forward or backward (Directional)
F
no
takes a function (the condition or the update is given as a function); the forms document also uses F for the future form, which defers the action
Many
no
works on a collection of items instead of one (the plural form)
Except
no
takes exceptions, what to leave out (the exceptional form)
U
no
returns the result without duplication

Every example is a test file of the library, run inside the library for this page; only those whose output kept every promise their file wrote are shown.

See also