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35 lines
1.1 KiB
35 lines
1.1 KiB
2 years ago
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"use strict";
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var includes = require("../array/#/contains")
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, uniq = require("../array/#/uniq")
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, copyDeep = require("./copy-deep")
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, objForEach = require("./for-each")
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, isPlainObject = require("./is-plain-object")
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, ensureValue = require("./valid-value");
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var isArray = Array.isArray, slice = Array.prototype.slice;
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var deepAssign = function (target, source) {
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if (target === source) return target;
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if (isPlainObject(target) && isPlainObject(source)) {
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objForEach(source, function (value, key) { target[key] = deepAssign(target[key], value); });
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return target;
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}
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if (isArray(target) && isArray(source)) {
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source.forEach(function (item) {
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if (includes.call(target, item)) return;
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if (isArray(item) || isPlainObject(item)) item = copyDeep(item);
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target.push(item);
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});
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return target;
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}
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if (isPlainObject(source) || isArray(source)) return copyDeep(source);
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return source;
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};
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module.exports = function (target /*, ...objects*/) {
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return uniq
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.call([ensureValue(target)].concat(slice.call(arguments, 1).map(ensureValue)))
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.reduce(deepAssign);
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};
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