12 lines
350 B
JavaScript
12 lines
350 B
JavaScript
exports.lookup = function(obj, field) {
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if (!obj) { return null; }
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var chain = field.split(']').join('').split('[');
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for (var i = 0, len = chain.length; i < len; i++) {
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var prop = obj[chain[i]];
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if (typeof(prop) === 'undefined') { return null; }
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if (typeof(prop) !== 'object') { return prop; }
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obj = prop;
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}
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return null;
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};
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