Parsing Numbers From Strings | Dataford Interview Questions

Tell me how you would write a function that extracts numbers from a string like "abc12e4" and returns the expected sum output of 15.

Interpret a number as a maximal contiguous sequence of digits and return the sum of all such numbers. Under this standard interpretation, "abc12e4" produces 16, not 15, so clarify the inconsistency before implementing. The function should accept one string and return an integer.

Constraints

0 <= len(text) <= 100000
text contains ASCII letters, digits, and punctuation
Each contiguous digit sequence represents a non-negative integer
Return 0 when the string contains no digits

Function Signature

def sum_numbers(text):

Your question is Parsing Numbers From Strings. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Tell me how you would write a function that extracts numbers from a string like "abc12e4" and returns the expected sum output of 15.

Constraints

0 <= len(text) <= 100000
text contains ASCII letters, digits, and punctuation
Each contiguous digit sequence represents a non-negative integer
Return 0 when the string contains no digits

Function Signature

def sum_numbers(text):

Your question is Parsing Numbers From Strings. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.