rambdax/src/dropWhile.js

Extended version of Rambda - a lightweight, faster alternative to Ramda

import { isArray as isArrayMethod } from './_internals/isArray.js'

export function dropWhile(predicate, iterable){
  if (arguments.length === 1){
    return _iterable => dropWhile(predicate, _iterable)
  }
  const isArray = isArrayMethod(iterable)
  if (!isArray && typeof iterable !== 'string'){
    throw new Error('`iterable` is neither list nor a string')
  }

  const toReturn = []
  let counter = 0

  while (counter < iterable.length){
    const item = iterable[ counter++ ]
    if (!predicate(item)){
      toReturn.push(item)
      break
    }
  }

  while (counter < iterable.length){
    toReturn.push(iterable[ counter++ ])
  }

  return isArray ? toReturn : toReturn.join('')
}