promisy-variables

Module lets to wait for expected variable value with promise

Install

npm install --save promisy-variables

or

yarn install promisy-variables

Import module

const {
    PromisyVariable,
    PromisyObject,
    PVar,
    PObj 
} = require("promisy-variables");

or

import { PromisyVariable, PromisyObject, PVar, PObj } from "promisy-variables";

Short hands

PVar is same as PromisyVariable

PObj is same as PromisyObject

Usage

/* Promisy Object initialization */
const pobj = new PObj({
    foo: "bar",
    baz: "zoo"
});
 
/* Promisy Variable initialization */
const pvar = new PVar("bar");
 
/* Set and get variables in Promisy Object */
pobj.set("foo", "qux");
pobj.get("foo"); // qux
 
pboj.set("baz", "zot");
pobj.get("baz"); // zot
 
/* Set and get variable value in Promisy Variable */
pvar.set("zoo");
pvar.get(); // zoo
 
/* Wait for variable value in Promisy Object */
async () => {
    // expecting foo = bar
    await pobj.waitFor("foo", "bar");
    // expecting baz = zoo
    await pobj.waitFor("baz", "zoo");
    // this line reaches only if foo and bar will be set to expecting values
};
 
/* Wait for variable value in Promisy Variable */
async () => {
    // expecting that pvar equals to bar
    await pvar.waitFor("bar");
    // this line reaches only if pvar will bet set to bar
};

Example

const pvar = new PVar("foo");
 
const waitForVariable = async () => {
    console.log("pvar value is", pvar.get());
    await pvar.waitFor("bar");
    console.log("pvar value is", pvar.get());
};
 
waitForVariable();
 
setTimeout(() => {
    pvar.set("bar");
}, 2000);
 
/* CONSOLE OUTPUT */
// > pvar value is foo
// after 2s
// > pvar value is bar

Author

Edvinas pranka

@epranka

https://www.kodmina.lt

License

The MIT License (MIT)

Copyright (c) 2019 Edvinas Pranka

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.