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Configuration error
Configuration error
; | |
var hasSymbols = require('has-symbols')(); | |
var GetIntrinsic = require('get-intrinsic'); | |
var callBound = require('call-bind/callBound'); | |
var isString = require('is-string'); | |
var $iterator = GetIntrinsic('%Symbol.iterator%', true); | |
var $stringSlice = callBound('String.prototype.slice'); | |
var $String = GetIntrinsic('%String%'); | |
module.exports = function getIteratorMethod(ES, iterable) { | |
var usingIterator; | |
if (hasSymbols) { | |
usingIterator = ES.GetMethod(iterable, $iterator); | |
} else if (ES.IsArray(iterable)) { | |
usingIterator = function () { | |
var i = -1; | |
var arr = this; // eslint-disable-line no-invalid-this | |
return { | |
next: function () { | |
i += 1; | |
return { | |
done: i >= arr.length, | |
value: arr[i] | |
}; | |
} | |
}; | |
}; | |
} else if (isString(iterable)) { | |
usingIterator = function () { | |
var i = 0; | |
return { | |
next: function () { | |
var nextIndex = ES.AdvanceStringIndex($String(iterable), i, true); | |
var value = $stringSlice(iterable, i, nextIndex); | |
i = nextIndex; | |
return { | |
done: nextIndex > iterable.length, | |
value: value | |
}; | |
} | |
}; | |
}; | |
} | |
return usingIterator; | |
}; | |