Reference · stzList

FindNth()

Case-insensitive word-order aliases used by narrative tests. (Cannot live inside FindNthOccurrenceCS as nested defs because they take a different arity -- top-level methods instead.)

Basic examples (2)

Softanza

o1 = new stzList([ "_", "_", "♥", "_", "♥", "_", "_", "♥", "_", "_" ])
? o1.FindNth(3, "♥")

Output

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 287_findnth.ring(opens in a new tab)

Softanza

o1 = new stzList([ "_", "_", "A":"C", "_", "A":"C", "_", "_", "A":"C", "_", "_" ])
? o1.FindNth(3, "A":"C")

Output

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 288_findnth.ring(opens in a new tab)

Scope (5)

Softanza

o1 = new stzList([ "A", "A", "A", "B", "B", "C" ])
# the 3rd A sits at 3
? o1.FindNthCS(3, "A", FALSE)

Output

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 453_findnthcs.ring(opens in a new tab)

Softanza

o1 = new stzList([ 1, 2, "A":"C", 4, 5, "A":"C", 7, "A":"C"])
? o1.FindFirst("A":"C")
? o1.FindNth(2,"A":"C")
? o1.FindLast("A":"C")

Output

3
6
8

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 292_findfirst.ring(opens in a new tab)

Softanza

o1 = new stzList([ "arem", "mohsen", "AREM" ])
? @@( o1.FindAll("arem") ) + NL
? o1.FindAllCS("arem", :CS = FALSE)
? o1.FindNth(2, "arem")
? o1.FindNthCS(2, "arem", :CS = FALSE)

Output

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 372_findall.ring(opens in a new tab)

Softanza

aLarge = [ "A", 10, "A", "♥", 20, 1:3, "♥", "B" ]
for i = 1 to 1_000_000
aLarge + i
next
o1 = new stzList(aLarge)
# FindNth(2, '♥') reports the position of the 2nd heart
? o1.FindNth(2, "♥")

Output

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 270_findnth.ring(opens in a new tab)

Softanza

o1 = new stzList([ "1", "1", [ "2", "♥", "2"], "1", [ "2", ["3", "🌞"] ] , "3" ])
? o1.FindFirst("3")
? o1.FindNth(3, "1")
? o1.Contains([ "2", "♥", "2"])
? o1.DeepContains("🌞")
? o1.DeepContainsMany([ "1", "♥", "3", "🌞" ]) # Or DeepContainsThese()
? o1.DeepContainsBoth("♥", :And = "🌞")
? o1.DeepContainsOneOfThese(["_", "🌞", "0" ])
? o1.DeepContainsNOfThese(2, ["_", "🌞", "0", "♥" ])

Output

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 326_findfirst.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

does what the method does, then returns the object, so the call can be chained

chains on the next, more specific type of object (the Q ladder)

QQQ

chains on the most specific type of object (the Q ladder)

QRT

returns the result as an object of the requested type

yes

takes a case-sensitivity flag · FindNthCS

takes the position to start from (StartingAt)

takes bounds that are included (IncludingBounds)

the extended form: more parameters than the base method

XTT

yet another extension: a further extended form, after XT

includes the position in what it returns

returns positions as sections, [start, end]

selects by a condition

selects by a condition, with the expressive keywords (@NextItem, @PreviousItem...)

takes a direction, forward or backward (Directional)

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

works on a collection of items instead of one (the plural form)

Except

takes exceptions, what to leave out (the exceptional form)

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.

FindNth()

Basic examples (2)

Scope (5)

The extensions of this method

See also