Re: Character.isWhitespace alternative? (whitespace check)
H Interesting Dominik.
Thanks for the information.
It's sure is clean, but didn't know that performance of regexp is
good in this case..
What I want is: if a character at index X is a white space. That means
I always have to take first a substring of one character and then do a
match. So besides checking for a whitespace, I also take a substring,
does that still perform well ??...
Besides that: I always understood that object creation should be
reduces as much as possible. In this case it always creates more
objects...
Might it be a good idea to store the pattern in a static field, to
overcome unnecessary pattern compilation?
So do something like this:
private final static Pattern PATTERN_WHITE_SPACE = Pattern.compile(\
\S);
..
...
..
In a helper method:
public static boolean matchWhiteSpace(String input) {
return PATTERN_WHITE_SPACE.matcher(input).matches();
}
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Re: Character.isWhitespace alternative? (whitespace check)
if performance is really that critical you should test several
alternatives and check which one is really the best for your case (and
don't forget to test cross-browser; especially IE)
On Sep 30, 10:32 am, Ed post2edb...@hotmail.com wrote:
H Interesting Dominik.
Thanks for the information.
It's sure is clean, but didn't know that performance of regexp is
good in this case..
What I want is: if a character at index X is a white space. That means
I always have to take first a substring of one character and then do a
match. So besides checking for a whitespace, I also take a substring,
does that still perform well ??...
Besides that: I always understood that object creation should be
reduces as much as possible. In this case it always creates more
objects...
Might it be a good idea to store the pattern in a static field, to
overcome unnecessary pattern compilation?
So do something like this:
private final static Pattern PATTERN_WHITE_SPACE = Pattern.compile(\
\S);
..
...
..
In a helper method:
public static boolean matchWhiteSpace(String input) {
return PATTERN_WHITE_SPACE.matcher(input).matches();
}
--~--~-~--~~~---~--~~
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Re: Character.isWhitespace alternative? (whitespace check)
Yes I can, but don't want to, as it's way to heave for just checking if a character is a white space... Especialy in my case where performance is an issue. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en -~--~~~~--~~--~--~---
Re: Character.isWhitespace alternative? (whitespace check)
Hi Ed, for performance reason I would definitely recommend you to actually use regex instead of equals or equalsIgnoreCase methods of the String class. Especially IE has really performance problems with former ones. Concerning heavy, I would actually say that it is much cleaner to use regex and more adaptable in case you would need in the future HTH Dominik Am 29.09.2009 um 01:11 schrieb Ed: Yes I can, but don't want to, as it's way to heave for just checking if a character is a white space... Especialy in my case where performance is an issue. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en -~--~~~~--~~--~--~---
Re: Character.isWhitespace alternative? (whitespace check)
did you try to use the regex method boolean matches = someString.matches(\\S); HTH Dominik On 28 Sep., 13:39, Ed post2edb...@hotmail.com wrote: What is the correct way to check for a white space character? This is done by the method Character.isWhitespace(char) but not supported by GWT. What is the alternative? I know check for whiteSpaces through someString.charAt(index) == ' '; But I am not sure if that's good enough as I think I forget things like \t --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en -~--~~~~--~~--~--~---
