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Reference · stzMatrix

Section()

finding thing in the matrix

also written: NumbersInSection · ElementsInSection

Basic examples (2)

Softanza
o1 = new stzMatrix([
	[ 14, 20, 16 ],
	[ 14, 20, 16 ],
	[ 17, 23, 19 ],
])
? @@( o1.Section([1, 1], [2, 2]) )
? @@NL( o1.FindElementsInSection([1, 1], [2, 2]) )
? @@NL( o1.ElementsInSectionZ([1, 1], [2, 2]) )
Output
[ 14, 14, 20, 20 ]
[
	[ 1, 1 ],
	[ 2, 1 ],
	[ 1, 2 ],
	[ 2, 2 ]
]
[
	[
		14,
		[ 1, 1 ]
	],
	[
		14,
		[ 2, 1 ]
	],
	[
		20,
		[ 1, 2 ]
	],
	[
		20,
		[ 2, 2 ]
	]
]

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 45_section.ring(opens in a new tab)

Softanza
o1 = new stzMatrix([
	[ 14, 20, 16 ],
	[ 14, 20, 16 ],
	[ 17, 23, 19 ],
])
? @@( o1.Section([ 1, 1 ], [ 2, 2 ]) )
? o1.SectionQ([ 1, 1 ], [ 2, 2 ]).StzType()
o1.SectionQQ([ 1, 1 ], [ 2, 2 ]) {
? Max()
? Min()
? Sum()
}
Output
[ 14, 14, 20, 20 ]
stzlist
20
14
68

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 44_working_with_matrix_sections.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 · SectionQ, NumbersInSectionQ, ElementsInSectionQ, SectionCSQ
QQ
yes
chains on the next, more specific type of object (the Q ladder) · SectionQQ, NumbersInSectionQQ, ElementsInSectionQQ
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
yes
takes a case-sensitivity flag · SectionCS, SectionCSQ, SectionCSZ, SectionCSZZ
ST
no
takes the position to start from (StartingAt)
IB
no
takes bounds that are included (IncludingBounds)
XT
yes
the extended form: more parameters than the base method · SectionXT
XTT
no
yet another extension: a further extended form, after XT
Z
yes
includes the position in what it returns · SectionZ, NumbersInSectionZ, ElementsInSectionZ, SectionCSZ
ZZ
yes
returns positions as sections, [start, end] · SectionZZ, SectionCSZZ
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