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Reference · stzList

DeepContains()

Same as DeepContainsCS: stzListPaths has only 3 methods - minimal, skip for now -- DeepRemove / DeepRemoveMany: walk the nested list structure and drop any item that matches pItem / any item in paItems. Recurses into nested lists. Ported from archive line 16144; simpler implementation here -- pure structural walk, no @@()-stringification round-trip. DeepContains / DeepContainsCS: does the (nested) list contain pItem at any depth? Recursive walk. Complements DeepRemove.

also written: DeeplyContains

Basic examples (2)

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
6
4
1
1
1
1
1
1

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 326_findfirst.ring(opens in a new tab)

Softanza
o1 = new stzList([
	"1",
	"🌞",
	"1",
	[ "2", "🌞", "2", "🌞"],
	"1",
	[ "2", ["3", "🌞"] ]
])
? o1.DeepContains("🌞")
? @@( o1.DeepFind("🌞") )
o1.DeepReplace("🌞", :By = "♥")
? @@( o1.Content() )
o1.DeepRemove("♥")
? @@SP( o1.Content() )
Output
1
[ [ 2 ], [ 4, 2 ], [ 4, 4 ], [ 6, 2, 2 ] ]
[ "1", "♥", "1", [ "2", "♥", "2", "♥" ], "1", [ "2", [ "3", "♥" ] ] ]

[
	"1",
	"1",
	[ "2", "2" ],
	"1",
	[
		"2",
		[ "3" ]
	]
]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 106_deepcontains.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 · DeepContainsCS, DeepContainsManyCS
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
yes
works on a collection of items instead of one (the plural form) · DeepContainsMany, DeepContainsManyCS
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