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'use strict';
import isArray from 'lodash-es/isArray';
import eachOf from './eachOf';
export default function transform (arr, memo, iterator, callback) {
if (arguments.length === 3) {
callback = iterator;
iterator = memo;
memo = isArray(arr) ? [] : {};
}
eachOf(arr, function(v, k, cb) {
iterator(memo, v, k, cb);
}, function(err) {
callback(err, memo);
});
}
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