how to have regular expression for a textfield which accepts all characters except a comma (,) and do not accept a white space at both ends

Question

How to write a regular expression for a text field which accepts all characters except a comma (,) and do not accept a white space at both the ends? I have tried

[^,][\B ]

but no use

like 'product generic no' instead of 'product,generic,no' or ' product generic no '

Is a blank input (ie no characters) acceptable? It passes your criteria as stated. Also, what language are you using? — Bohemian, Feb 27 '14 at 07:39
@Bohemian no empty text is inacceptable and i am using extjs/javascript — rajesh4ext, Feb 27 '14 at 07:41
Why do you want to use regular expression for such a simple test? — core1024, Feb 27 '14 at 07:49
@core1024 because most of the times data is entered by some layman and later it is used for naming a product..and how can i achieve that without regex if i want to restrict them — rajesh4ext, Feb 27 '14 at 07:52
I should have been more specific. Is a single character acceptable? The reason I ask is that saying "yes" increases the complexity of the problem — Bohemian, Feb 27 '14 at 08:04

SzG · Answer 1 · 2014-02-27T07:56:12.357

0

Using a Perl regular expression

/^\S[^,]*\S$/

This should work from 2 characters up, but fails in the edge case where the string has only one non-comma character. To cover that too:

/^((\S[^,]*\S)|([^\s,]))$/

edited Feb 27 '14 at 07:56

answered Feb 27 '14 at 07:26

SzG

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I fixed it, it seems. – SzG Feb 27 '14 at 07:56
@SxG no, i tried again, it doesnt allow space in middle – rajesh4ext Feb 27 '14 at 09:05

score 0 · Answer 2 · answered Feb 27 '14 at 07:26

0

Something like below:

/^\S[^,]*\S$/

answered Feb 27 '14 at 07:26

xdazz

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core1024 · Accepted Answer · 2014-02-27T08:59:33.117

0

I suggest a solution without regular expression. As you said you're using JS so the function is in JavaScript:

function isItInvalid(str) {
    var last = str.length - 1;
    return (last < 2 || 
            str[0] == ' ' ||
            str[last] == ' ' ||
            str.indexOf(',') != -1);
}

EDIT: Just made it a bit more readable. It also checks if the string is at least 3 chars.

edited Feb 27 '14 at 08:59

answered Feb 27 '14 at 08:03

core1024

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by using this we can display error msg after entering data ..but i want to restrict while entering – rajesh4ext Feb 27 '14 at 08:26
Just instead of `regex` use the `validator` option ;) See how here http://stackoverflow.com/questions/5186595/extjs-dependent-field-validation – core1024 Feb 27 '14 at 08:34
this worked but i am unable to restrict to not to enter :( validator: function(value){ var last = value.length - 1; if((value[0] == ' ' ||value[last] == ' ' )){ return 'Space not Allowed at start and end'; } if(value.indexOf(',') != -1) { return ', not allowed'; }else { return true; } } – rajesh4ext Feb 27 '14 at 09:36
You can use `maskRe` to restrict the comma like that `maskRe: /[^,]/,`. This works per character (i think) so don't try to filter the space. – core1024 Feb 27 '14 at 11:51

how to have regular expression for a textfield which accepts all characters except a comma (,) and do not accept a white space at both ends

3 Answers3