lazy-eval/lib/lazy.js

Library to do lazy evaluation with Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
;
const lazy = (getter) => {
    let evaluated = false;
    let _res = null;
    const res = function () {
        if (evaluated)
            return _res;
        _res = getter.apply(this, arguments);
        evaluated = true;
        return _res;
    };
    res.isLazy = true;
    res.then = (modifier) => modifier(res());
    res.map = (mapper) => lazy(() => mapper(res()));
    return res;
};
exports.default = lazy;
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