31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
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// 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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