Excel like ASC Function

[steve_tang]

Hi,

Is there a similar function in alteryx that can convert full-width (double-byte) characters to half-width (single-byte) characters like the ASC function in Excel?

For example,    "ＡＢＣＤＥ" (double-byte)  will be converted to "ABCDE"(single-byte).

I have tried some of the conversion functions but it does not work.

[rafalolbert]

Hi @steve_tang,

Looks like this formula will do the trick: ConvertFromCodePage([Double-Byte], 936) - also see my attached workflow for the same.

This page may provide further context: https://help.alteryx.com/current/CodePages.htm

Thanks,

Rafal

#Excuse me, do you speak Alteryx?

[steve_tang]

HI @rafalolbert

Thanks for you reply.

For pure english, the fomula works very well.

But when I add some characters with variable width like " Ｓ－line饰条，红色  " ,that will result in messy code.

Is there any other workaround?

Steve

[danilang · Accepted solution]

Hi @steve_tang 

@rafalolbert's solution looks like the way to proceed, but I think that you need to parse your data on a character by character basis.  

The formula that I used is this.  

if ChartoInt([Original]) >65535-256 then
	ConvertFromCodePage([Original], 936)
else
	[Original]
endif

Only apply the code page conversion if the value of the character is > (65535 - 256). I looked, unsuccessfully, for a reference that shows the unicode range for double wide characters.  I chose the top 256 of the range because it fit the sample you provided.  You may have to adjust the 256 to fit your data.  If you do manage to find the actual range, please post it back here.

Results

The middle columns is the result of applying the conversion to all characters.  The last column uses the formula from above.

Dan

[steve_tang]

Hi @danilang 

I have slighted modified your workflow to accommodate multi-row data and adjust the unicode range start point to be 65281.

for unicode range between 65270-65280,  these are Arabic Presentation Forms-B that we do not care. (https://unicode-table.com/en/blocks/arabic-presentation-forms-b/)

Thanks for your help!

Steve

[danilang]

Glad to help @steve_tang 

Thanks for posting the correct range

Dan 

[kohsim]

May i check if there is any way we can convert half-width to full-width (both text and numbers)?