@softwareventures/maintain-project/collections/maps.js

Automatically create and maintain TypeScript projects with standard settings for Software Ventures Limited

import { toArray, concatMap, zip } from "@softwareventures/iterable";
import { failure, isSuccess, success } from "../result/result.js";
export function copy(map) {
    return new Map(map);
}
export function empty(map) {
    return map.size === 0;
}
export function mapValue(map, f) {
    const result = new Map();
    for (const [key, value] of map.entries()) {
        result.set(key, f(value, key));
    }
    return result;
}
export function mapValueFn(f) {
    return map => mapValue(map, f);
}
export function partitionValue(map, predicate) {
    const a = new Map();
    const b = new Map();
    for (const [key, value] of map.entries()) {
        if (predicate(value)) {
            a.set(key, value);
        }
        else {
            b.set(key, value);
        }
    }
    return [a, b];
}
export function insert(map, key, value) {
    return copy(map).set(key, value);
}
export async function liftPromises(promises) {
    return Promise.all(promises.values())
        .then(values => zip(promises.keys(), values))
        .then(entries => new Map(entries));
}
export function liftResults(map) {
    const [successes, failures] = partitionValue(map, isSuccess);
    if (empty(failures)) {
        return success(mapValue(successes, success => success.value));
    }
    else {
        return failure(toArray(concatMap(failures.values(), failure => failure.reasons)));
    }
}
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