What ⍦ means
A regular set records whether a value appears; a multiset also counts its copies. In NARS2000, the APL multiset operator ⍦ applies those counts to selected primitive functions.
In NARS2000 notation, ⍦ follows the function glyph: L∪⍦R applies multiset union to input arrays L and R.
Don't confuse it with
3
Greek Small Letter Psi
Greek small letter psi, a real letter that UTS #39 treats as the same skeleton; it can be pasted or substituted for this APL symbol.
Cyrillic Small Letter Psi
Cyrillic small letter psi, listed as a confusable of this APL symbol, so it can slip into text in its place.
𝜓
Mathematical Italic Small Psi
Mathematical italic small psi, a styled copy of the Greek letter that comes in from maths-formatted text; UTS #39 lists it too.
Related characters
3
Combination ideas
2NARS2000 multiset union: keeps the larger count from either input.
NARS2000 multiset intersection: keeps the smaller count.
Questions people ask
1Why does ⍦ show as a box?
The current font may lack APL glyph coverage. An APL-supporting font can display ⍦.
More like this
9
How to type or find ⍦
- Search it as
- APL multiset operator · NARS2000 multiset · multiset union · ⍦ meaning
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
macOS
HTML
⍦CSS
\2366NARS2000 APL keyboard
On the NARS2000 APL keyboard, Altm enters ⍦.
Codes and encoding1 code points
HTML decimal
⍦
HTML hex
⍦
CSS content
content: "\2366";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8D%A6
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.