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