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Reference · stzList

Extract()

Same as ExtractCS: Remove the occurrences of the given item and RETURN them (extract = remove + return).

Basic examples (2)

Softanza
	o1 = new stzList([ "A", "B", "_", "C", "*" ])
	? o1.ExtractMany(["_", "*"]) # Or ExtractThese()
	? o1.Content()
Output
_
*

A
B
C

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 219_extractmany.ring(opens in a new tab)

Softanza
o1 = new stzList([ 1, 2, "♥", 3, "*", 4, "_" ])
? @@( o1.ExtractW('{ NOT isNumber(@item) }') )
? @@( o1.Content() )
Output
[ "♥", "*", "_" ]
[ 1, 2, 3, 4 ]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 226_extractwxt.ring(opens in a new tab)

Scope (1)

Softanza
o1 = new stzList([ "A", "B", "_", "C" ])
# extract example 1
? @@( o1.Extract("_") )
# extract example 2
? @@( o1.Content() )
Output
"_"
[ "A", "B", "C" ]

run on 2026-10-02 04:22 inside the library at commit 0e72e2e2c; taken from 218_extract.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 · ExtractWQ
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 · ExtractCS, ExtractManyCS
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 · ExtractW, ExtractWQ
WF
yes
selects by a condition, with the expressive keywords (@NextItem, @PreviousItem...) · ExtractWF
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) · ExtractMany, ExtractManyCS
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