FindNth()

find all / find nth

Basic examples (2)

Softanza

o1 = new stzString("12*45*78*90")
# the 2nd star from 4
? o1.FindNthST(2, "*", :StartingAt = 4)
# the first star from 4
? o1.FindFirstST("*", :StartingAt = 4)

Output

9
6

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 555_findnthst.ring(opens in a new tab)

Softanza

o1 = new stzString("•♥••••♥••")
# the 2nd char equal to '♥' is at position 7
? o1.FindNthW(2, '@char = "♥"')
# the 2nd substring equal to '•♥•' starts at position 6
? o1.FindNthW(2, '@substring = "•♥•"')

Output

7
6

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 246_findnthw.ring(opens in a new tab)

Scope (7)

Softanza

o1 = new stzString("12♥♥♥67♥♥♥12♥♥♥")
# the 2nd from 3
? o1.FindNthST(2, "♥♥♥", :StartingAt = 3)
# the first from 5
? o1.FindFirstST("♥♥♥", :StartingAt = 5)
# the last from 6
? o1.FindLastST("♥♥♥", :StartingAt = 6)

Output

8
8
13

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 317_using_st_and_std_extension.ring(opens in a new tab)

Softanza

o1 = new stzString("12♥♥♥67♥♥♥12♥♥♥")
# the first from 6
? o1.FindFirstST("♥♥♥", :StartingAt = 6)
# the last from 6
? o1.FindLastST("♥♥♥", :StartingAt = 6)
# the 2nd from 6
? o1.FindNthST(2, "♥♥♥", :StartingAt = 6)

Output

8
13
13

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 323_findfirstst.ring(opens in a new tab)

Softanza

o1 = new stzString("bla {♥♥♥} blaba bla {♥♥♥} blabla")
# the first from 8
? o1.FindFirstST("♥♥♥", :StartingAt = 8)
# the last from 8
? o1.FindLastST("♥♥♥", :Startingat = 8)
# the 2nd from 3
? o1.FindNthST(2, "♥♥♥", :StartingAt = 3)

Output

22
22
22

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 351_findfirstst.ring(opens in a new tab)

Softanza

o1 = new stzString("12♥♥♥67♥♥♥12♥♥♥")
# the 1st from position 3 is 3 itself
? o1.FindNthST(1, "♥♥♥", :StartingAt = 3)
# the next after 3
? o1.FindNext("♥♥♥", :StartingAt = 3)
# the previous before 10 must END before 10
? o1.FindPrevious("♥♥♥", :StartingAt = 10)

Output

3
8
3

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 316_findnthst.ring(opens in a new tab)

Softanza

o1 = new stzString("12♥♥♥67♥♥♥12♥♥♥")
# the first backward from 12
? o1.FindFirstSTD("♥♥♥", :StartingAt = 12, :Backward)
# the last backward from 12
? o1.FindLastSTD("♥♥♥", :StartingAt = 12, :Backward)
# the 2nd backward from 12
? o1.FindNthSTD(2, "♥♥♥", :StartingAt = 12, :Backward)

Output

8
3
3

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 325_findfirststd.ring(opens in a new tab)

Softanza

o1 = new stzString("12♥♥♥67♥♥♥12♥♥♥")
# the 2nd backward from 10 (:Going spelling)
? o1.FindNthSTD(2, "♥♥♥", :StartingAt = 10, :Going = :Backward)
# the first backward from 14 (bare :Backward)
? o1.FindFirstSTD("♥♥♥", :StartingAt = 14, :Backward)
# the last backward from 6 (:Direction spelling)
? o1.FindLastSTD("♥♥♥", :StartingAt = 6, :Direction = :Backward)

Output

3
8
3

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 317_using_st_and_std_extension.ring(opens in a new tab)

Softanza

o1 = new stzString("ab_cd_ef_gh")
# the first underscore
? o1.FindFirst("_")
# a missing star from 4
? o1.FindFirstST("*", :StartingAt = 4)
# the underscore from 3
? o1.FindFirstST("_", :StartingAt = 3)
# the last underscore
? o1.FindLast("_")
# no last star
? o1.FindLast("*")
# the 2nd underscore
? o1.FindNth(2, "_")

Output

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 508_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

yes

takes the position to start from (StartingAt) · FindNthST, FindNthSTD, FindNthSTZZ, FindNthSTDZZ

takes bounds that are included (IncludingBounds)

yes

the extended form: more parameters than the base method · FindNthXT

XTT

yet another extension: a further extended form, after XT

yes

includes the position in what it returns · FindNthZ

yes

returns positions as sections, [start, end] · FindNthZZ, FindNthDZZ, FindNthSTZZ, FindNthSTDZZ

yes

selects by a condition · FindNthW

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

yes

takes a direction, forward or backward (Directional) · FindNthD, FindNthDZZ, FindNthSTD, FindNthSTDZZ

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 (7)

The extensions of this method

See also