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(function (global, factory) {
if (typeof define === "function" && define.amd) {
define('Reselect', ['exports'], factory);
} else if (typeof exports !== "undefined") {
factory(exports);
} else {
var mod = {
exports: {}
};
factory(mod.exports);
global.Reselect = mod.exports;
}
})(this, function (exports) {
'use strict';
exports.__esModule = true;
exports.defaultMemoize = defaultMemoize;
exports.createSelectorCreator = createSelectorCreator;
exports.createStructuredSelector = createStructuredSelector;
function _toConsumableArray(arr) {
if (Array.isArray(arr)) {
for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
arr2[i] = arr[i];
}
return arr2;
} else {
return Array.from(arr);
}
}
function defaultEqualityCheck(a, b) {
return a === b;
}
function defaultMemoize(func) {
var equalityCheck = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultEqualityCheck;
var lastArgs = null;
var lastResult = null;
var isEqualToLastArg = function isEqualToLastArg(value, index) {
return equalityCheck(value, lastArgs[index]);
};
return function () {
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
if (lastArgs === null || lastArgs.length !== args.length || !args.every(isEqualToLastArg)) {
lastResult = func.apply(undefined, args);
}
lastArgs = args;
return lastResult;
};
}
function getDependencies(funcs) {
var dependencies = Array.isArray(funcs[0]) ? funcs[0] : funcs;
if (!dependencies.every(function (dep) {
return typeof dep === 'function';
})) {
var dependencyTypes = dependencies.map(function (dep) {
return typeof dep;
}).join(', ');
throw new Error('Selector creators expect all input-selectors to be functions, ' + ('instead received the following types: [' + dependencyTypes + ']'));
}
return dependencies;
}
function createSelectorCreator(memoize) {
for (var _len2 = arguments.length, memoizeOptions = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
memoizeOptions[_key2 - 1] = arguments[_key2];
}
return function () {
for (var _len3 = arguments.length, funcs = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
funcs[_key3] = arguments[_key3];
}
var recomputations = 0;
var resultFunc = funcs.pop();
var dependencies = getDependencies(funcs);
var memoizedResultFunc = memoize.apply(undefined, [function () {
recomputations++;
return resultFunc.apply(undefined, arguments);
}].concat(memoizeOptions));
var selector = function selector(state, props) {
for (var _len4 = arguments.length, args = Array(_len4 > 2 ? _len4 - 2 : 0), _key4 = 2; _key4 < _len4; _key4++) {
args[_key4 - 2] = arguments[_key4];
}
var params = dependencies.map(function (dependency) {
return dependency.apply(undefined, [state, props].concat(args));
});
return memoizedResultFunc.apply(undefined, _toConsumableArray(params));
};
selector.resultFunc = resultFunc;
selector.recomputations = function () {
return recomputations;
};
selector.resetRecomputations = function () {
return recomputations = 0;
};
return selector;
};
}
var createSelector = exports.createSelector = createSelectorCreator(defaultMemoize);
function createStructuredSelector(selectors) {
var selectorCreator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : createSelector;
if (typeof selectors !== 'object') {
throw new Error('createStructuredSelector expects first argument to be an object ' + ('where each property is a selector, instead received a ' + typeof selectors));
}
var objectKeys = Object.keys(selectors);
return selectorCreator(objectKeys.map(function (key) {
return selectors[key];
}), function () {
for (var _len5 = arguments.length, values = Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {
values[_key5] = arguments[_key5];
}
return values.reduce(function (composition, value, index) {
composition[objectKeys[index]] = value;
return composition;
}, {});
});
}
});
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