typescript-functional-extensions/dist/esm/utilities.js

A TypeScript implementation of synchronous and asynchronous Maybe and Result monads

export const never = () => {
    throw Error('This error should be unreachable');
};
export function isDefined(value) {
    return value !== undefined && value !== null;
}
export function isSome(value) {
    return value !== undefined && value !== null;
}
export function isNone(value) {
    return !isDefined(value);
}
export function isFunction(value) {
    return typeof value === 'function';
}
export function isPromise(value) {
    return value instanceof Promise;
}
/**
 * Sourced from https://github.com/ReactiveX/rxjs/blob/7268bd31d1cb30cf01a1a69a7b14458e15b76b58/src/internal/util/pipe.ts
 * @param fns
 * @returns
 */
export function pipeFromArray(fns) {
    if (fns.length === 0) {
        return noop;
    }
    if (fns.length === 1) {
        return fns[0];
    }
    return function piped(input) {
        return fns.reduce((prev, fn) => fn(prev), input);
    };
}
export function noop(value) {
    if (value) {
        return value;
    }
}