Regex issues with word-replacing filter in angular

Question

I am using the filter below to convert the string to camel case. In addition to this I do not want a string with alphanumeric characters to be converted to camelcase.

For example:

If the input is "HELLO I AM INDIA1237"

The output has to be "Hello I Am INDIA1237"

my filter is as below:

angular.module('app')
 .filter('titleCase', function() {
return function(input) {
  input = input || '';
  input = input.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();}); //convert to camelcase
  return input.replace(/[A-Za-z0-9 ]/, function(txt){return txt.toUpperCase();}); //retain alphanumeric string in uppercase

};
});

the second condition does not seem to be working. Can anyone please help.

I think, you want to capitalize dictionary words, since INDIA1237 remains same. This is very difficult, need to reference each word in some dictionary for capitalizing. — Vivek
– Vivek, Commented Dec 16, 2015 at 6:43
is there a possible regular expression that can be used to exclude the camelcase filter on the string containing alphanumeric characters? — neha tj
– neha tj, Commented Dec 16, 2015 at 6:46

Paul LeBeau · Accepted Answer · 2015-12-16 07:03:50Z

1

Your regular expressions are not correct.

\w matches alphanumeric characters, so your first regex should not use that rule. You probably want: /[A-Za-z]+/

Your second regex has two things wrong. Firstly, it only matches one character. Secondly it it will always match the same things the first one does.

You want a regex that only matches words that have a digit. So you need something like: /[A-Za-z]+[0-9][A-Za-z]*/. This will match one or more letters, followed by at least one digit, followed by zero or more letters or digits. If these words always end only in digits, then you could simplify it to /[A-Za-z]+[0-9]+/.

edited Dec 16, 2015 at 7:03

answered Dec 16, 2015 at 6:49

Paul LeBeau

103k10 gold badges173 silver badges204 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

neha tj Over a year ago

input = input.replace(/[A-Za-z]*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();}); //convert to camelcase return input.replace(/[A-Za-z]+[0-9][A-Za-z]*/g, function(txt){return txt.toUpperCase();}); //retain alphanumeric string in uppercase

Collectives™ on Stack Overflow

Regex issues with word-replacing filter in angular

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related