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30 lines
1.1 KiB
30 lines
1.1 KiB
// Internal method, used by iteration functions. |
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// Calls a function for each key-value pair found in object |
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// Optionally takes compareFn to iterate object in specific order |
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"use strict"; |
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var callable = require("./valid-callable") |
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, value = require("./valid-value") |
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, bind = Function.prototype.bind |
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, call = Function.prototype.call |
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, keys = Object.keys |
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, objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable; |
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module.exports = function (method, defVal) { |
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return function (obj, cb /*, thisArg, compareFn*/) { |
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var list, thisArg = arguments[2], compareFn = arguments[3]; |
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obj = Object(value(obj)); |
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callable(cb); |
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list = keys(obj); |
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if (compareFn) { |
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list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined); |
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} |
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if (typeof method !== "function") method = list[method]; |
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return call.call(method, list, function (key, index) { |
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if (!objPropertyIsEnumerable.call(obj, key)) return defVal; |
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return call.call(cb, thisArg, obj[key], key, obj, index); |
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}); |
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}; |
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};
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