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Configuration error
File size: 1,713 Bytes
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'use strict';
var GetIntrinsic = require('get-intrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var MAX_SAFE_INTEGER = require('../helpers/maxSafeInteger');
var Call = require('./Call');
var CreateDataPropertyOrThrow = require('./CreateDataPropertyOrThrow');
var Get = require('./Get');
var HasProperty = require('./HasProperty');
var IsArray = require('./IsArray');
var LengthOfArrayLike = require('./LengthOfArrayLike');
var ToString = require('./ToString');
// https://262.ecma-international.org/11.0/#sec-flattenintoarray
module.exports = function FlattenIntoArray(target, source, sourceLen, start, depth) {
var mapperFunction;
if (arguments.length > 5) {
mapperFunction = arguments[5];
}
var targetIndex = start;
var sourceIndex = 0;
while (sourceIndex < sourceLen) {
var P = ToString(sourceIndex);
var exists = HasProperty(source, P);
if (exists === true) {
var element = Get(source, P);
if (typeof mapperFunction !== 'undefined') {
if (arguments.length <= 6) {
throw new $TypeError('Assertion failed: thisArg is required when mapperFunction is provided');
}
element = Call(mapperFunction, arguments[6], [element, sourceIndex, source]);
}
var shouldFlatten = false;
if (depth > 0) {
shouldFlatten = IsArray(element);
}
if (shouldFlatten) {
var elementLen = LengthOfArrayLike(element);
targetIndex = FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1);
} else {
if (targetIndex >= MAX_SAFE_INTEGER) {
throw new $TypeError('index too large');
}
CreateDataPropertyOrThrow(target, ToString(targetIndex), element);
targetIndex += 1;
}
}
sourceIndex += 1;
}
return targetIndex;
};
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