@launchdarkly/js-server-sdk-common/dist/evaluation/collection.d.ts

LaunchDarkly Server SDK for JavaScript - common code

/**
 * Iterate a collection any apply the specified operation. The first operation which
 * returns a value will be returned and iteration will stop.
 *
 * @param collection The collection to enumerate.
 * @param operator The operation to apply to each item.
 * @returns The result of the first successful operation.
 */
export declare function firstResult<T, U>(collection: T[] | undefined, operator: (val: T, index: number) => U | undefined): U | undefined;
/**
 * Iterate a collection in series awaiting each check operation.
 * @param collection The collection to iterate.
 * @param check The check to perform for each item in the container.
 * @param cb Called with true if all items pass the check.
 */
export declare function allSeriesAsync<T>(collection: T[] | undefined, check: (val: T, index: number, cb: (res: boolean) => void) => void, cb: (res: boolean) => void): void;
/**
 * Iterate a collection in series awaiting each check operation.
 * @param collection The collection to iterate.
 * @param check The check to perform for each item in the container.
 * @param cb called with true on the first item that passes the check. False
 * means no items passed the check.
 */
export declare function firstSeriesAsync<T>(collection: T[] | undefined, check: (val: T, index: number, cb: (res: boolean) => void) => void, cb: (res: boolean) => void): void;
/**
 * Iterate a collection and execute the the given check operation
 * for all items concurrently.
 * @param collection The collection to iterate.
 * @param check The check to run for each item.
 * @param cb Callback executed when all items have been checked. The callback
 * will be called with true if each item resulted in true, otherwise it will
 * be called with false.
 */
export declare function allAsync<T>(collection: T[] | undefined, check: (val: T, cb: (res: boolean) => void) => void, cb: (res: boolean | null | undefined) => void): void;
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