Common

This module wraps helper functions around host and other miscellaneous functions to simplify development

• Requires

none

misc.js

• Miscellaneous wrappers
• Requires:

   fs
   md5 

• exported functions:
  • isArray(arg) - return whether arg is array or not
  • isObject(arg) - return whether arg is object or not
  • isInt(arg) - return whether arg is integer or not
  • isEmptyString(arg) - return whether arg is empty string
  • deepCopy(arg) - return a clone of the arg
  • md5Sort(arg) - return hash of a sorted array which is converted from an arg object
  • escapeHtml(arg) - return an html escaped string from arg
  • escapeRegExp(arg) - return a regex escaped string from arg
  • mv(src, dst) - mv a file from src to dst
  • prettifyKBUnit(arg) - from a kb unit, convert to pretty, i.e. 1024 * 1024 = 1GB
  • calculateDistance(lat1, lon1, lat2, lon2) - bounding box computation of long lat distance
  • convertToGb(arg) - convert kb value to gb, 1000 * 1000 = 1
  • uniqify(arg, fields) - return unique array based on specific fields
  • awaitWrap(arg) - return result object from promises with optional timeout
  • getSafeValueFromNestedObject(arg, arr) - safely retrieve values from nested object
  • jsonSafe(arg) - function to parse a json string (JSON.parse) safely
  • error(scope, err) - handle error bubbling, concatenating current scope into the message

host.js

• Host level wrappers
• Requires:

   os
   net 

• exported functions:
  • myName() - return the hostname
  • myAddr(iface) - return the ip address
  • home() - return the home directory
  • isALive(host, port) - detect if the host is alive
  • isIPv4(s) - check if the given string s is a valid IPv4
  • isIPv6(s) - check if the given string s is a valid IPv6