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JavaScript

Posted by Sumit Kumar
Sumit Kumar
32 Points

RegEx not matching repeated non-word characters

i have a string which is converted to an array. The string contains non-word characters like -,+ etc. The format for regular expression i am using is let regEx = /\W+/; and suppose this is the string let a = "cat-hat-bat" i am using test function to check for non-word characters in the string which is now converted to an array using split method of array. The problem i am facing is that on encountering same non-word character in the array i get the first non-word character index for both the non-word characters. For ex, if i convert the a variable to an array every alphabet will have an index number and so do the non-word character so what i get in output is 3 index number for both the non-word characters instead of 3 and 7. Please help me with this problem it's urgent.

2 Answers

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

You didn't explain how you're obtaining the index value, but I'd guess that's where the issue is. To make it possible to provide specific help, show your actual code.

Sumit Kumar
Sumit Kumar
32 Points

let a = "cat-hat-bat"; let b = a.split("");

let regEx = /\W+/g; let popIn = [ ];

for( let i = 0; i < b.length; i++ ){ if( regEx.test(b[i]) ){
popIn.push(b.indexOf(b[i]));
} }

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The "indexOf" function always returns the first match for a specific term, so that's why you get the same value each time.

But since you're looping through the array anyway, you can just push the current index value instead:

for (let i = 0; i < b.length; i++) {
  if (regEx.test(b[i])) {
    popIn.push(i);
  }
}
Sumit Kumar
Sumit Kumar
32 Points

Thanks for the help the solution worked.

Sumit Kumar
Sumit Kumar
32 Points

.

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

This is very different from the original question. This issue should be started as a new question, with a bit more explanation about what problem you are experiencing with it. Specifically, what it is doing that is different from your intentions and expectations. The specific data you are using to test it would also be helpful.

Also, this code is not complete. At the very beginning, it calls a function named "readLine" that is not defined.

Sumit Kumar
Sumit Kumar
32 Points
Sumit Kumar
Sumit Kumar
32 Points

.