export function promisify(f, thisContext) {
    return function () {
        const args = Array.prototype.slice.call(arguments);
        return new Promise((resolve, reject) => {
            args.push((err, result) => err !== null ? reject(err) : resolve(result));
            f.apply(thisContext, args);
        });
    };
}
export function map(elts, f) {
    const apply = (appElts) => Promise.all(appElts.map((elt) => typeof elt.then === 'function' ? elt.then(f) : f(elt)));
    return typeof elts.then === 'function' ? elts.then(apply) : apply(elts);
}
export function _try(f, thisContext) {
    const args = Array.prototype.slice.call(arguments);
    return new Promise((res, rej) => {
        try {
            args.shift();
            res(f.apply(thisContext, args));
        }
        catch (err) {
            rej(err);
        }
    });
}
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