js-slang
Version:
Javascript-based implementations of Source, written in Typescript
49 lines • 1.56 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.timeoutPromise = exports.PromiseTimeoutError = void 0;
exports.mapAndFilter = mapAndFilter;
exports.objectKeys = objectKeys;
exports.getChapterName = getChapterName;
const runtimeSourceError_1 = require("../errors/runtimeSourceError");
const langs_1 = require("../langs");
class PromiseTimeoutError extends runtimeSourceError_1.RuntimeSourceError {
}
exports.PromiseTimeoutError = PromiseTimeoutError;
const timeoutPromise = (promise, timeout) => new Promise((resolve, reject) => {
const timeoutid = setTimeout(() => reject(new PromiseTimeoutError()), timeout);
promise
.then(res => {
clearTimeout(timeoutid);
resolve(res);
})
.catch(e => {
clearTimeout(timeoutid);
reject(e);
});
});
exports.timeoutPromise = timeoutPromise;
/**
* Run the mapping function over the items, filtering out any items that
* that the mapping function returned `undefined` for
*/
function mapAndFilter(items, mapper) {
return items.reduce((res, item) => {
const newItem = mapper(item);
if (newItem !== undefined)
return [...res, newItem];
return res;
}, []);
}
/**
* Type safe `Object.keys`
*/
function objectKeys(obj) {
return Object.keys(obj);
}
/**
* Given the chapter value, return the string name of that chapter
*/
function getChapterName(chapter) {
return objectKeys(langs_1.Chapter).find(name => langs_1.Chapter[name] === chapter);
}
//# sourceMappingURL=misc.js.map