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Function: startsWith()

startsWith(prefix): Predicate<string>

Defined in: predicate/comparison/index.ts:205

Creates a predicate that tests if a string starts with a prefix.

Case-sensitive.

Parameters​

prefix​

string

The prefix to test for

Returns​

Predicate<string>

A predicate that returns true if value starts with prefix

Example​

import * as R from 'remeda'

const names = ['Alice', 'Bob', 'Alex', 'Barbara']
R.filter(names, startsWith('A')) // => ['Alice', 'Alex']

// Real-world: Filter files by extension
const files = ['app.ts', 'test.spec.ts', 'config.json']
R.filter(files, (f) => !startsWith('test.')(f)) // => non-test files

See​

  • endsWith - for suffix testing
  • includes - for substring testing