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Reference · stzList

FindAllItemsW()

FindW: find items matching a condition (eval-based) (case-sensitive by default)

also written: FindWhere · PositionsW · PositionsWhere · ItemsPositionsW · FindAllItemsWhere

Basic examples (2)

Softanza
o1 = new stzList([ 2, 8, 2, 11, 2, 11, 1, 4, 2, 1, 3, 2, 10, 8, 3, 6, 8 ])
? o1.FindW( '{ Q( @NextItem ).IsDoubleOf( @PreviousItem ) }' )
? o1.FindWhere( '{ Q( This[@i+1] ).IsDoubleOf( This[@i-1] ) }' )
Output
8
11

8
11

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 484_findwxt.ring(opens in a new tab)

Softanza
o1 = new stzList([ "A", "m", "n", "B", "A", "x", "C", "z", "B" ])
? o1.ItemsPositionsWF( func x { return Q(x).IsUppercase() } ) # Say also o1.FindItemsW(...) or .FindW(...)
? @@( o1.ItemsAndTheirPositionsWF( func x { return Q(x).IsUppercase() } ) )
Output
1
4
5
7
9

[ [ "A", [ 1, 5 ] ], [ "B", [ 4, 9 ] ], [ "C", [ 7 ] ] ]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 478_itemspositionswxt.ring(opens in a new tab)

Scope (1)

Softanza
o1 = new stzList([
	"_", 3, "_" , TRUEObject(), 6, "*",
	[ "L1", "L1" ], 12, FALSEObject(),
	[ "L2", "L2" ], 25, "*"
])
? o1.FindWhere(' @NextItem = "*" ')
? o1.FindWhere('{
	isNumber(@item) and @i <= 9 and
	isNumber(This[@i+3]) and This[@i+3] = 2 * @item
}')
? o1.FindWhere('{
	isNumber(@item) and @i <= 9 and
	isNumber(This[@i+3]) and This[@i+3] != 2 * @item
}')
Output
5
11

2
5

8

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 549_findwherext.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 · FindAllItemsWCS
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
yes
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 · PositionsWF, ItemsPositionsWF
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