@beenotung/tslib/lazy/lazy.js

utils library in Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Lazy = void 0;
/**
 * @description this class is not strict type, be ware of the type <A>
 * */
class Lazy {
    constructor(f) {
        this.f = f;
    }
    value() {
        const res = this.f();
        delete this.f;
        this.value = () => res;
        return res;
    }
    map(f) {
        return new Lazy(() => f(this.value()));
    }
    add(b) {
        return this.map(a => a + b);
    }
    minus(b) {
        return this.map(a => a - b);
    }
    mult(b) {
        return this.map(a => a * b);
    }
    rem(b) {
        return this.map(a => a % b);
    }
    div(b) {
        return this.map(a => a / b);
    }
    quot(b) {
        /* tslint:disable no-bitwise */
        return this.map(a => (a / b) | 0);
        /* tslint:enable no-bitwise */
    }
    quotRem(b) {
        return this.map((a) => {
            /* tslint:disable no-bitwise */
            return [(a / b) | 0, a % b];
            /* tslint:enable no-bitwise */
        });
    }
    and(b) {
        return this.map(a => a && b);
    }
    or(b) {
        return this.map(a => a || b);
    }
    not() {
        return this.map(a => !a);
    }
    notnot() {
        return this.map(a => !!a);
    }
}
exports.Lazy = Lazy;
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