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doesStartWith()

doesStartWith(prefix): (input) => boolean

Creates a predicate function that determines if a string starts with a specific prefix.

Parameters​

prefix​

string

The substring to use as the prefix

Returns​

(input): boolean

Parameters​

input​

string

Returns​

boolean

Remarks​

  • Pure function with no side effects
  • Case-sensitive comparison
  • Uses String.prototype.startsWith() internally
  • Useful for array filtering and functional programming

Example​

const startsWithHttp = doesStartWith('http');
startsWithHttp('https://example.com'); // true
startsWithHttp('ftp://example.com');   // false