var hasKeys = require("./has-keys")

module.exports = extend

function extend(target) {
    var sources = [].slice.call(arguments, 1)

    for (var i = 0; i < sources.length; i++) {
        var source = sources[i]

        if (!hasKeys(source)) {
            continue
        }

        for (var key in source) {
            if (source.hasOwnProperty(key)) {
                target[key] = source[key]
            }
        }
    }

    return target
}