iter-tools-es/impls/$starts-with/starts-with.js

The iterable toolbox

const {
  iterableCurry
} = require('../../internal/iterable.js');

const {
  __firstOr
} = require('../$first-or/first-or.js');

const none = Symbol('none');

function __startsWith(iterable, value, same = Object.is) {
  const first = __firstOr(iterable, none);

  if (first === none) return false;
  return same(value, first);
}

exports.__startsWith = __startsWith;
const startsWith = /*#__PURE__*/iterableCurry(__startsWith, {
  minArgs: 1,
  maxArgs: 2,
  reduces: true,

  validateArgs(args) {
    if (true && typeof args[0] === 'string') {
      console.warn('For string inputs use startsWithSeq instead of startsWith');
    }
  }

});
exports.startsWith = startsWith;