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