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Reference · stzString

ContainsInSection()

ContainsInSection: does pcSubStr appear within the substring bounded by positions [n1, n2] (inclusive)?

also written: ContainsBetweenPositions

Basic examples (2)

Softanza
# a caret after position 2
? Q("^^♥^^").ContainsXT("^", :AfterPosition = 2)
# a caret in the 5..3 span (normalized)
? Q("^^♥^^").ContainsInSection("^", 5, 3)
Output
1
1

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 173_containsxt.ring(opens in a new tab)

Softanza
o1 = new stzString("123♥♥678♥♥1234♥♥789")
# '♥' is inside section 3..10
? o1.ContainsInSection("♥", 3, 10)
# '♥' is inside all three sections
? o1.ContainsInSections("♥", [ [3,10], [8,12], [14,19] ])
Output
1
1

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 104_containsinsection.ring(opens in a new tab)

Scope (1)

Softanza
# '♥' is in section 2..4
? Q("^^♥^^").ContainsInSection("♥", 2, 4)
# ContainsBetweenPositions agrees
? Q("^^♥^^").ContainsBetweenPositions("♥", 2, 4)
# '♥' is in section 1..3
? Q("^^♥^^").ContainsInSection("♥", 1, 3)
Output
1
1
1

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from 171_containsinsection.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
yes
takes a case-sensitivity flag · ContainsInSectionCS
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