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string.replace()

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  string.replace() Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-08-13 14:18 -0600
    Re: string.replace() dr.j.r.stockton@gmail.com - 2019-08-13 14:52 -0700
      Re: string.replace() Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-08-14 15:36 -0600
    Re: string.replace() "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-14 10:18 +0200
      Re: string.replace() Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-08-14 15:41 -0600
        Re: string.replace() "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-15 13:55 +0200

#37126 — string.replace()

I nice easy one to start the day.

I wish to replace spaces in a string with
"+" characters.  I am using:
     var mungedTopic;
     mungedTopic.replace(/ /g, "+");

but the spaces are not replaced.  There can
be multiple spaces, and I want to replace
them all.  I therefore need to use a regular
expression rather than a string.  I guess my
regular expression is wrong, but I don't see
why.

-- 
Regards,
Martin Leese
E-mail: please@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/

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#37128

On Tuesday, 13 August 2019 21:18:26 UTC+1, Martin Leese  wrote:
> I nice easy one to start the day.
> 
> I wish to replace spaces in a string with
> "+" characters.  I am using:
>      var mungedTopic;
>      mungedTopic.replace(/ /g, "+");
> 
> but the spaces are not replaced.  There can
> be multiple spaces, and I want to replace
> them all.  I therefore need to use a regular
> expression rather than a string.  I guess my
> regular expression is wrong, but I don't see
> why.

Method replace does not alter the pre-existing string, but returns an altered copy of it.

So :   mungedTopic = mungedTopic.replace(/ /g, "+");


-- 
  (c) John Stockton, near London, UK.  Using Google Groups.           |
 Mail: J.R.""""""""@physics.org - or as Reply-To, if any.             |

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#37140

dr.j.r.stockton@gmail.com wrote:
> On Tuesday, 13 August 2019 21:18:26 UTC+1, Martin Leese  wrote:
>> I nice easy one to start the day.
>>
>> I wish to replace spaces in a string with
>> "+" characters.  I am using:
>>      var mungedTopic;
>>      mungedTopic.replace(/ /g, "+");
>>
>> but the spaces are not replaced.  There can
>> be multiple spaces, and I want to replace
>> them all.  I therefore need to use a regular
>> expression rather than a string.  I guess my
>> regular expression is wrong, but I don't see
>> why.
> 
> Method replace does not alter the pre-existing string, but returns an altered copy of it.
> 
> So :   mungedTopic = mungedTopic.replace(/ /g, "+");

Many thanks, that looks like it will work.
Can't test it at the moment; it is part of
an AJAX system, and the whole thing is down.

-- 
Regards,
Martin Leese
E-mail: please@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/

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#37132

ram@zedat.fu-berlin.de (Stefan Ram) wrote on 14 Aug 2019 in 
comp.lang.javascript:

> Martin Leese <please@see.Web.for.e-mail.INVALID> writes:
>>mungedTopic.replace(/ /g, "+");
>>but the spaces are not replaced.
> 
>   main.js
> 
> print( "True 1 1 0".replace( / /g, "+" ));
> 
>   transcript
> 
> True+1+1+0

However, 
since there are other characters that produce a visible space,
like the tab charater for instance,
you possibly could prefer to use the \s for 'any spacelike character':

myString = myString.replace( /\s/g, '+' ));

==========================

If you are unsure about using Regex,
replace() can also, in a simple way, be used without that:

myString = myString.replace( ' ', '+' ));

but then the /g for 'global' would not be there,
and only the first instance of a space would be replaced.

-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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#37141

Evertjan. wrote:
> However, 
> since there are other characters that produce a visible space,
> like the tab charater for instance,
> you possibly could prefer to use the \s for 'any spacelike character':
> 
> myString = myString.replace( /\s/g, '+' ));

The strings are mine (as opposed to user
input) so either will do.  This suggestion
is more general, and so more bullet proof,
so I will use it.

> If you are unsure about using Regex,
> replace() can also, in a simple way, be used without that:
> 
> myString = myString.replace( ' ', '+' ));
> 
> but then the /g for 'global' would not be there,
> and only the first instance of a space would be replaced.

My original post explained that there can
be more than one space, so I have to use a
regular expression.

Thanks for your help.
-- 
Regards,
Martin Leese
E-mail: please@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/

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#37145

Martin Leese <please@see.Web.for.e-mail.INVALID> wrote on 14 Aug 2019 in 
comp.lang.javascript:

> Evertjan. wrote:
>> However, 
>> since there are other characters that produce a visible space,
>> like the tab charater for instance,
>> you possibly could prefer to use the \s for 'any spacelike character':
>> 
>> myString = myString.replace( /\s/g, '+' ));
> 
> The strings are mine (as opposed to user
> input) so either will do.  This suggestion
> is more general, and so more bullet proof,
> so I will use it.
> 
>> If you are unsure about using Regex,
>> replace() can also, in a simple way, be used without that:
>> 
>> myString = myString.replace( ' ', '+' ));
>> 
>> but then the /g for 'global' would not be there,
>> and only the first instance of a space would be replaced.
> 
> My original post explained that there can
> be more than one space, so I have to use a
> regular expression.

This is Usenet, not a helpdesk,
so responses go to the group,
and may exeed an original question.

> Thanks for your help.

It may be expedient for you to learn Regex syntax and methods,
and not depend on thes same of others.


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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