Replace all occurrences of a specific character with another.

Replace all occurrences of a specific character with another.

[Hongyi Zhao]

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Hi here,

I want to replace all occurrences of a specific character, say, `d`,
as shown in the attached screenshot, with another character, e.g.,
`n`. Is there any practical way to do this?

Regards,
Zhao
-- 
Assoc. Prof. Hongsheng Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province

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Re: Replace all occurrences of a specific character with another.

[PierGianLuca]

It looks like your character appears surrounded by non-letters in every instance. In this case you could use `query-replace-regexp` replacing

\<d\>

with

n

The "\<\>" brackets match beginning and end of words:

https://www.gnu.org/software/emacs/manual/html_node/emacs/Regexp-
Backslash.html


Your character also seems to appear inside maths expressions only. In this case you could use the function defined in this post:

http://stackoverflow.com/questions/19845598/emacs-regex-replacing-a-string-inside-a-latex-equation

it's very useful and I use it regularly in LaTeX documents.

Cheers,
Luca


On 230722 16:35, Hongyi Zhao wrote:
> Hi here,
> 
> I want to replace all occurrences of a specific character, say, `d`,
> as shown in the attached screenshot, with another character, e.g.,
> `n`. Is there any practical way to do this?
> 
> Regards,
> Zhao

Re: Replace all occurrences of a specific character with another.

[Hongyi Zhao]

On Sat, Jul 22, 2023 at 11:08 PM PierGianLuca
<luca@magnaspesmeretrix.org> wrote:
>
> It looks like your character appears surrounded by non-letters in every instance. In this case you could use `query-replace-regexp` replacing
>
> \<d\>
>
> with
>
> n
>
> The "\<\>" brackets match beginning and end of words:
>
> https://www.gnu.org/software/emacs/manual/html_node/emacs/Regexp-
> Backslash.html
>
>
> Your character also seems to appear inside maths expressions only. In this case you could use the function defined in this post:
>
> http://stackoverflow.com/questions/19845598/emacs-regex-replacing-a-string-inside-a-latex-equation

Thank you for the nice tip, but there are several versions of
functions suggested there. So, which one is your preferred version?

> it's very useful and I use it regularly in LaTeX documents.
>
> Cheers,
> Luca

Regards,
Zhao

> On 230722 16:35, Hongyi Zhao wrote:
> > Hi here,
> >
> > I want to replace all occurrences of a specific character, say, `d`,
> > as shown in the attached screenshot, with another character, e.g.,
> > `n`. Is there any practical way to do this?
> >
> > Regards,
> > Zhao

Re: Replace all occurrences of a specific character with another.

[Michael Heerdegen]

Hongyi Zhao <hongyi.zhao@gmail.com> writes:

> Hi here,
>
> I want to replace all occurrences of a specific character, say, `d`,
> as shown in the attached screenshot, with another character, e.g.,
> `n`. Is there any practical way to do this?

The screenshot shows something different.  I answer the screenshot:

Depending on the mode, start isearching using word or symbol mode (M-s
w, M-s _) enter you search term and then M-% to query-replace the word or
symbol.

"Depending" means it depends on the syntax table of the current mode if
that is exactly what you want, or more, or less matches.  And if I
guessed correctly what you want.

Michael.

Re: Replace all occurrences of a specific character with another.

[PierGianLuca]

Hi Zhao,

You're welcome.

> Thank you for the nice tip, but there are several versions of
> functions suggested there. So, which one is your preferred version?

I use this, on Emacs 28:

https://stackoverflow.com/a/44913296/6090141

and it works for me.

Cheers,
Luca

Re: Replace all occurrences of a specific character with another.

[Emanuel Berg]

Hongyi Zhao wrote:

> I want to replace all occurrences of a specific character,
> say, `d`, as shown in the attached screenshot, with another
> character, e.g., `n`. Is there any practical way to do this?

A loop with `re-search-forward' and `replace-match', see

  https://dataswamp.org/~incal/emacs-init/regexp.el

-- 
underground experts united
https://dataswamp.org/~incal