How should I practice Find the Substring?

Start by reading the full statement, solve the visible examples, then compare the pattern against related LinkedIn online assessment problems in FastPrep.

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Find the Substring

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Problem statement

Given s and x, determine the zero-based index of the first occurrence of x in s.

String s consists of lowercase letters in the range ascii[a-z].
String x consists of lowercase letters and may also contain a single wildcard character, *, that represents any one character.

Function

firstOccurrence(s: String, x: String) → int

Complete the function firstOccurrence in the editor below. The function must return an integer denoting the zero-based index of the first occurrence of string x in s. If x is not in s, return -1 instead.

firstOccurrence has the following parameter(s):

string s: a string of lowercase letters
string x: a string of lowercase letters which may contain 1 instance of the wildcard character *

Examples

Example 1

s = "xabcdey"x = "ab*de"return = 1

Constraints

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