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50 lines
1.0 KiB
50 lines
1.0 KiB
/*! |
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* get-value <https://github.com/jonschlinkert/get-value> |
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* |
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* Copyright (c) 2014-2015, Jon Schlinkert. |
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* Licensed under the MIT License. |
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*/ |
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module.exports = function(obj, prop, a, b, c) { |
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if (!isObject(obj) || !prop) { |
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return obj; |
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} |
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prop = toString(prop); |
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// allowing for multiple properties to be passed as |
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// a string or array, but much faster (3-4x) than doing |
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// `[].slice.call(arguments)` |
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if (a) prop += '.' + toString(a); |
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if (b) prop += '.' + toString(b); |
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if (c) prop += '.' + toString(c); |
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if (prop in obj) { |
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return obj[prop]; |
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} |
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var segs = prop.split('.'); |
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var len = segs.length; |
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var i = -1; |
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while (obj && (++i < len)) { |
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var key = segs[i]; |
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while (key[key.length - 1] === '\\') { |
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key = key.slice(0, -1) + '.' + segs[++i]; |
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} |
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obj = obj[key]; |
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} |
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return obj; |
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}; |
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function isObject(val) { |
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return val !== null && (typeof val === 'object' || typeof val === 'function'); |
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} |
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function toString(val) { |
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if (!val) return ''; |
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if (Array.isArray(val)) { |
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return val.join('.'); |
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} |
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return val; |
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}
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