What is the best way to remove non-digit characters from the beginning of a line?

Question

Is javascript the best way to remove non-digit characters from the beginning of a line?

-_1234d5fr 

should ideally turn into

 1234d5fr 

Answer 1

 str = str.replace(/^\D+/, ''); 

• regular-expressions.info/Character Classes , Anchors and Repeat
  • \D stands for characters without numbers
  • The carriage ^ matches the position before the first character in the line
  • + is one or more

Answer 2

What about...

 str = str.replace(/^[^0-9]+/, '');