@cookbook/dot-notation/lib/utils/merge.js

Object readings and complex transformations using dot notation syntax.

import is from './is';
import shallowCopy from './shallow-copy';
const merge = (x, y) => {
    if (!(is.object(x) || is.object(y))) {
        return y;
    }
    const lhs = shallowCopy(x);
    const rhs = shallowCopy(y);
    const keys = Object.keys(lhs);
    const content = shallowCopy(y);
    for (let i = 0; i < keys.length; i += 1) {
        const key = keys[i];
        const lhsValue = shallowCopy(lhs[key]);
        const rhsValue = shallowCopy(rhs[key]);
        if (is.array(lhsValue) && is.array(rhsValue)) {
            content[key] = rhsValue;
        }
        else if (is.object(lhsValue) && is.object(rhsValue)) {
            content[key] = merge(lhsValue, rhsValue);
        }
        else {
            content[key] = rhsValue || lhsValue;
        }
    }
    return content;
};
export default merge;
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