parsing string in javascript

Question

I have string MetadataCompanyTotal which is Camel Case. I need to insert space between string.

Input is

var str="MetadataCompanyTotal";

output should be

"Metadata Company Total".

I have tried the following approach but needed a faster way with less number of lines as there is lines constraint.

My approach :

var i, 
    str="MetadataCompanyTotal",
    temp_str="",
    final_space_inserted_str="";

for(i=0; i < str.length ; i++){
   if ( str.charAt(i) === str.charAt(i).toUpperCase()){
      final_space_inserted_str += temp_str + " ";//inserting space.
      temp_str = str.charAt(i);
   }
   else{
      temp_str += str.charAt(i);
      }
}


final_space_inserted_str+=temp_str.// last word.

Is there any efficient approach in javascript?

str.replace(/\B[A-Z]/g, " $&"); replace every uppercase character inside a word with a space + the match (matched character) — Thomas
– Thomas, Commented Jul 15, 2017 at 15:49
hanks for the answer. If the input is "MetadataUSAddressType" I wanted the output as 'Metadata US Address Type'. But I am getting 'Metadata U S Address Type'. Is there any way in regex to achieve this. Basically stream of continuous uppercase characters should be grouped — Akash Sateesh
– Akash Sateesh, Commented Jul 16, 2017 at 4:00
"continuous uppercase characters should be grouped" You mean Metadata USAddress Type? As here "USA" would be the group of uppercase characters. Just fix the result afterwards: str.replace(/\B[A-Z]/g, " $&").replace(/U S\b/g, v => "US"); — Thomas
– Thomas, Commented Jul 16, 2017 at 6:08
stackoverflow.com/questions/30521224/… --- just replace the underscore with a space — baao
– baao, Commented Jul 16, 2017 at 18:17

Yogen Darji · Accepted Answer · 2017-07-16 04:34:27Z

1

Use regex to replace all upper case with space before and trim to remove first space.

var CamelCaseWord = "MetadataUSAddressType";

alert(CamelCaseWord.replace(/([A-Z])([A-Z])([a-z])|([a-z])([A-Z])/g, '$1$4 $2$3$5').trim())

edited Jul 16, 2017 at 4:34

answered Jul 15, 2017 at 15:42

Yogen Darji

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2 Comments

Akash Sateesh Over a year ago

Thanks for the answer. If the input is "MetadataUSAddressType" I wanted the output as 'Metadata US Address Type'. But I am getting 'Metadata U S Address Type'. Is there any way in regex to achieve this. Basically stream of continuous uppercase characters should be grouped.

Thomas Over a year ago

you can simplify this to replace(/\B([A-Z])([A-Z][a-z])|([a-z])([A-Z])/g, '$1$3 $2$4'); and can even get rid of that trim()

omer cohen · Accepted Answer · 2017-07-16 18:28:51Z

0

i Have Another solution

var str = "MetadataCompanyTotal";
var arr = str.split(/(?=[A-Z])/);
var temp = arr.join(" ");
alert(temp);

can look the code here

answered Jul 16, 2017 at 18:28

omer cohen

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