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Reference · stzList

NumberOfItems()

getting the number of items of the list

also written: HowManyItems

Basic examples (2)

Softanza
o1 = new stzList([ "tea", "rice", "tea", "fish", "rice", "tea" ])
? o1.NumberOfItems()
Output
6

run on 2026-10-02 04:24 inside the library at commit 0e72e2e2c; taken from 01-find-then-apply.en.md(opens in a new tab)

Softanza
o1 = new stzList([ "teeba", "hussein", "haneen" , "hussein" ])
? o1.DuplicatesRemoved()
? o1.NumberOfItems()
Output
teeba
hussein
haneen

4

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 456_duplicatesremoved.ring(opens in a new tab)

Scope (3)

Softanza
? StzListQ([ "A", 1, "B", 2, "C", 3 ]).NumberOfItemsW(' isNumber(@item) ')
? StzListQ([ "A", 1, "B", 2, "C", 3 ]).NumberOfItemsW(' isString(@item) ')
? StzListQ([ 1, 2, 3, 4, 5, 6 ]).NumberOfItemsWF( func x { return Q(x).IsDividableBy(2) } )
Output
3
3
3

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 524_numberofitemswxt.ring(opens in a new tab)

Softanza
o1 = new stzList([ 14, 10, 14, 14, 20 ])
# botharebetween example 1
? @@( QRT([2, 4], :stzPairOfNumbers).BothAreBetween(1, o1.NumberOfItems()) )
# botharebetween example 2
? @@( QRT([0, 4], :stzPairOfNumbers).BothAreBetween(1, o1.NumberOfItems()) )
Output
1
0

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 184_botharebetween.ring(opens in a new tab)

Softanza
o1 = new stzList([ "emm", "EMM", "eMm", "EMM" ])
? o1.Find("EMM") # Same as FindCS("EMM", :CS = TRUE)
? o1.FindCS("EMM", :CS = FALSE)
? o1.NumberOfItems()
? o1.NumberOfItemsCS(FALSE)
? o1.Content() # Same as ContentCS(TRUE)
? o1.ContentCS(FALSE)
Output
2
4

1
2
3
4

4
1
emm
EMM
eMm
EMM

emm

run on 2026-10-02 04:23 inside the library at commit 0e72e2e2c; taken from from_string_case_sensitivity_in_softanza.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
yes
does what the method does, then returns the object, so the call can be chained · NumberOfItemsQ, NumberOfItemsUQ, NumberOfItemsCSQ
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 · NumberOfItemsCS, NumberOfItemsCSQ
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
yes
selects by a condition · HowManyItemsW, NumberOfItemsW
WF
yes
selects by a condition, with the expressive keywords (@NextItem, @PreviousItem...) · HowManyItemsWF, NumberOfItemsWF
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
yes
returns the result without duplication · NumberOfItemsU, NumberOfItemsUQ

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