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Reference · stzString

FindNthNext()

The position of the nth occurrence of pcSub after the given position (0 when there is none).

Basic examples (1)

Softanza
o1 = new stzString("•••••••••")
# FindNext('') is 0
? o1.FindNext("", :StartingAt = 1)
# FindNext('x') (absent) is 0
? o1.FindNext("x", :StartingAt = 1)
# FindNext('•', from 5) is 6
? o1.FindNext("•", :StartingAt = 5)
# FindNthNext(6, '•', from 3) is 9
? o1.FindNthNext(6, "•", :StartingAt = 3)
# FindNthNext(5, '•', from 1) is 6
? o1.FindNthNext(5, "•", :StartingAt = 1)
# FindPrevious('•', from 5) is 4
? o1.FindPrevious("•", :StartingAt = 5)
# FindPrevious('•', from 2) is 1
? o1.FindPrevious("•", :StartingAt = 2)
# FindNthPrevious(8, '•', from 9) is 1
? o1.FindNthPrevious(8, "•", :StartingAt = 9)
# FindNthPrevious(3, '•', from 4) is 1
? o1.FindNthPrevious(3, "•", :StartingAt = 4)
Output
0
0
6
9
6
4
1
1
1

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 236_findnext.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