Basic Examples

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Test whether a character is katakana:

○
KatakanaQ
["ア"]
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True
Out[]=
○
KatakanaQ
["a"]
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False
Out[]=
○
KatakanaQ
["あ"]
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False
Out[]=

Test if a string contains only katakana characters:

○
KatakanaQ
["カタカナ"]
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True
Out[]=
○
KatakanaQ
["片仮名"]
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False
Out[]=
○
KatakanaQ
["katakana"]
In[]:=
False
Out[]=
○
KatakanaQ
["かたかな"]
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False
Out[]=

Scope

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KatakanaQ
yields
False
when given spaces:

○
KatakanaQ
["ウルフラム ラングウィッジ"]
In[]:=
False
Out[]=

Use the katakana middle dot as a valid separator:

ResourceFunction["FromCharacterName"]["KatakanaMiddleDot"]
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・
Out[]=
○
KatakanaQ
[%]
In[]:=
True
Out[]=
○
KatakanaQ
["ウルフラム・ラングウィッジ"]
In[]:=
True
Out[]=

KatakanaQ
yields
False
when given punctuation characters:

○
KatakanaQ
["ウルフラムラングウィッジ！"]
In[]:=
False
Out[]=

KatakanaQ
threads over lists:

○
KatakanaQ
"あ","ア","チェケラ","二"
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{False,True,True,False}
Out[]=

Options

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IgnorePunctuation

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By default, the presence of characters that match
PunctuationCharacter
will cause
KatakanaQ
to yield
False
:

○
KatakanaQ
["チェケラ！"]
In[]:=
False
Out[]=

Ignore punctuation:

○
KatakanaQ
"チェケラ！",IgnorePunctuationTrue
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True
Out[]=

IgnoreWhitespace

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By default, the presence of characters that match
WhitespaceCharacter
will cause
KatakanaQ
to yield
False
:

○
KatakanaQ
["ウルフラム ラングウィッジ"]
In[]:=
False
Out[]=

Ignore whitespace characters:

○
KatakanaQ
"ウルフラム ラングウィッジ","IgnoreWhitespace"True
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True
Out[]=

Properties and Relations

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The empty string will yield
True
:

○
KatakanaQ
[""]
In[]:=
True
Out[]=

Get the full list of katakana characters:

SelectFromCharacterCode/@Range[0,65535],
○
KatakanaQ
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Test if a character name corresponds to a katakana character:

Possible Issues

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Neat Examples

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