import clone from 'just-clone';
-// import { Constants } from './internal';
import { Constants } from './Constants';
import { WebSocketCloseEventStatusString } from '../types';
return Math.floor(crypto.randomInt(max + 1));
}
+ /**
+ * Rounds the given number to the given scale.
+ * The rounding is done using the "round half away from zero" method.
+ *
+ * @param numberValue - The number to round.
+ * @param scale - The scale to round to.
+ * @returns The rounded number.
+ */
public static roundTo(numberValue: number, scale: number): number {
const roundPower = Math.pow(10, scale);
- return Math.round(numberValue * roundPower) / roundPower;
- }
-
- public static truncTo(numberValue: number, scale: number): number {
- const truncPower = Math.pow(10, scale);
- return Math.trunc(numberValue * truncPower) / truncPower;
+ return Math.round(numberValue * roundPower * (1 + Number.EPSILON)) / roundPower;
}
public static getRandomFloatRounded(max = Number.MAX_VALUE, min = 0, scale = 2): number {
}
public static isCFEnvironment(): boolean {
- return process.env.VCAP_APPLICATION !== undefined;
+ return !Utils.isNullOrUndefined(process.env.VCAP_APPLICATION);
}
public static isIterable<T>(obj: T): boolean {
return value == null;
}
- public static isEmptyArray(object: unknown | unknown[]): boolean {
- if (Array.isArray(object) && object.length === 0) {
- return true;
- }
- return false;
+ public static isEmptyArray(object: unknown): boolean {
+ return Array.isArray(object) && object.length === 0;
}
- public static isNotEmptyArray(object: unknown | unknown[]): boolean {
- if (Array.isArray(object) && object.length > 0) {
- return true;
- }
- return false;
+ public static isNotEmptyArray(object: unknown): boolean {
+ return Array.isArray(object) && object.length > 0;
}
public static isEmptyObject(obj: object): boolean {
`${str.slice(0, pos)}${subStr}${str.slice(pos)}`;
/**
+ * Computes the retry delay in milliseconds using an exponential backoff algorithm.
+ *
* @param retryNumber - the number of retries that have already been attempted
* @returns delay in milliseconds
*/
- public static exponentialDelay(retryNumber = 0): number {
+ public static exponentialDelay(retryNumber = 0, maxDelayRatio = 0.2): number {
const delay = Math.pow(2, retryNumber) * 100;
- const randomSum = delay * 0.2 * Utils.secureRandom(); // 0-20% of the delay
+ const randomSum = delay * maxDelayRatio * Utils.secureRandom(); // 0-20% of the delay
return delay + randomSum;
}
}
/**
- * Generate a cryptographically secure random number in the [0,1[ range
+ * Generates a cryptographically secure random number in the [0,1[ range
*
* @returns
*/
}
/**
- * Convert websocket error code to human readable string message
+ * Converts websocket error code to human readable string message
*
* @param code - websocket error code
* @returns human readable string message