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Reference · stzList

FindNumbersAsSections()

FindNumbersAsSections: scan content, return [[startPos,endPos],...] for each contiguous run of numeric items. Each section endpoint is a 1-based position in the original list. Single-number runs are returned as [pos, pos] (degenerate section).

also written: NumbersAsSections

Basic examples (2)

Softanza
o1 = new stzList([ 1, 2, 3, 4, "A", "B", 7, 8, "C", "D", 11, 12, 13 ])
? @@( o1.FindNumbersAsSections() )
Output
[ [ 1, 4 ], [ 7, 8 ], [ 11, 13 ] ]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 29_findnumbersassections.ring(opens in a new tab)

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.FindNumbersAsSections() ) # or FindNumbersZZ()
? @@( o1.FindStringsZZ() )
? @@( o1.FindListsZZ() )
? @@( o1.FindObjectsZZ() )
Output
[ [ 1, 3 ], [ 7, 8 ], [ 15, 16 ] ]
[ [ 4, 6 ], [ 12, 13 ] ]
[ [ 9, 11 ], [ 14, 14 ] ]
[ [ 17, 19 ] ]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 30_findnumbersassections.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
no
does what the method does, then returns the object, so the call can be chained
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