JS Built-ins
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StringString.prototype.searchbeginner

String.prototype.search() — returns index of first match

📖 Usage Example
'hello world'.search(/world/)   // → 6
'hello'.search(/d/)           // → -1
'abc123'.search(/[0-9]/)       // → 3

Use search() to find the index of the first regex match in a string, returning -1 if not found.

String.prototype.search()

str.search(regexp) returns the index of the first match of regexp, or -1 if not found.

Challenge: Implement findDigitIndex(str) that returns the index of the first digit.

findDigitIndex('abc3def') // → 3
findDigitIndex('hello')   // → -1
💡 Hints (1)
  • • `str.search(/\d/)` returns the index of the first digit character.