molstar/lib/commonjs/mol-util/memoize.js

A comprehensive macromolecular library.

"use strict";
/**
 * Copyright (c) 2018 mol* contributors, licensed under MIT, See LICENSE file for more info.
 *
 * @author David Sehnal <david.sehnal@gmail.com>
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.memoizeLatest = memoizeLatest;
exports.memoize1 = memoize1;
/** Cache the latest result from calls to a function with any number of arguments */
function memoizeLatest(f) {
    let lastArgs = void 0, value = void 0;
    return (...args) => {
        if (!lastArgs || lastArgs.length !== args.length) {
            lastArgs = args;
            value = f.apply(void 0, args);
            return value;
        }
        for (let i = 0, _i = args.length; i < _i; i++) {
            if (args[i] !== lastArgs[i]) {
                lastArgs = args;
                value = f.apply(void 0, args);
                return value;
            }
        }
        return value;
    };
}
/** Cache all results from calls to a function with a single argument */
function memoize1(f) {
    const cache = new Map();
    return a => {
        if (cache.has(a))
            return cache.get(a);
        const v = f(a);
        cache.set(a, v);
        return v;
    };
}