prefix.md

prefix

Test whether a string starts with a prefix.

Numeric.string.prefix(input, opener, begin, finish)

Checks the beginning of each string entry.

Parameters:
- input: String or array of strings to test
- opener: Prefix expected at the beginning
- begin: Optional starting offset within each string
- finish: Optional ending offset within each string
Returns: Match results matching the input shape
NumPy: Covers np.strings.startswith, np.char.startswith through a single Numerix method.

import Numeric from '@neabyte/numerix'

const flag = Numeric.string.prefix('hello', 'he')

console.log(flag)
// true

import Numeric from '@neabyte/numerix'

const flag = Numeric.string.prefix('hello', 'lo')

console.log(flag)
// false

import Numeric from '@neabyte/numerix'

const flag = Numeric.string.prefix('hello', '')

console.log(flag)
// true

import Numeric from '@neabyte/numerix'

const flags = Numeric.string.prefix(['hello', 'world'], 'he')

console.log(flags)
// [true,false]