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Reference · stzMatrix

FindCol()

`def`, not `func`. Inside a class body `func` does not define a method, so FindCol was unreachable and FindCols -- its only caller -- raised R14. It was the sole `func` among 95 definitions here; FindRow, FindRows and FindCols all use `def`.

Basic examples (2)

Softanza
o1 = new stzMatrix([
	[ 88, 85, 88 ],
	[ 70, 88, 70 ],
	[ 99, 65, 99 ]
])
? @@( o1.FindCol([ 88, 70, 99 ]) )
Output
[ 1, 3 ]

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 28_findcol_-_find_columns_that_match_a_pattern.ring(opens in a new tab)

Softanza
oM = new stzMatrix([ [88,85,88], [70,88,70], [99,65,99] ])
# FindCol
? @@(oM.FindCol([ 88, 70, 99 ]))
oM2 = new stzMatrix([ [88,85,88,1], [70,88,70,1], [99,65,99,1] ])
# ...and FindCols, which could not work without it
? @@(oM2.FindCols([ [1,1,1], [88,70,99] ]))
Output
[ 1, 3 ]
[ 1, 3, 4 ]

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from matrix_dead_calls_narrated.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