48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
|
"use strict";
|
||
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
||
|
|
var cacheProp = Symbol.for('[memoize]');
|
||
|
|
function Memoize(keyBuilder) {
|
||
|
|
return function (_, propertyKey, descriptor) {
|
||
|
|
if (descriptor.value != null) {
|
||
|
|
descriptor.value = memoize(propertyKey, descriptor.value, keyBuilder || (function (v) { return v; }));
|
||
|
|
}
|
||
|
|
else if (descriptor.get != null) {
|
||
|
|
descriptor.get = memoize(propertyKey, descriptor.get, keyBuilder || (function () { return propertyKey; }));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
exports.Memoize = Memoize;
|
||
|
|
function ensureCache(target, reset) {
|
||
|
|
if (reset === void 0) { reset = false; }
|
||
|
|
if (reset || !target[cacheProp]) {
|
||
|
|
Object.defineProperty(target, cacheProp, {
|
||
|
|
value: Object.create(null),
|
||
|
|
configurable: true,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return target[cacheProp];
|
||
|
|
}
|
||
|
|
function ensureChildCache(target, key, reset) {
|
||
|
|
if (reset === void 0) { reset = false; }
|
||
|
|
var dict = ensureCache(target);
|
||
|
|
if (reset || !dict[key]) {
|
||
|
|
dict[key] = new Map();
|
||
|
|
}
|
||
|
|
return dict[key];
|
||
|
|
}
|
||
|
|
function memoize(namespace, func, keyBuilder) {
|
||
|
|
return function () {
|
||
|
|
var args = [];
|
||
|
|
for (var _i = 0; _i < arguments.length; _i++) {
|
||
|
|
args[_i] = arguments[_i];
|
||
|
|
}
|
||
|
|
var cache = ensureChildCache(this, namespace);
|
||
|
|
var key = keyBuilder.apply(this, args);
|
||
|
|
if (cache.has(key))
|
||
|
|
return cache.get(key);
|
||
|
|
var res = func.apply(this, args);
|
||
|
|
cache.set(key, res);
|
||
|
|
return res;
|
||
|
|
};
|
||
|
|
}
|