How to use

StringChain

in

lodash

const getEventForView = (event) => {
 const type = _
  .chain(event)
  .get('event_type')
  .split('.')
  .last()
  .value();
 const name = _.get(event, 'property_name');
 const value = _.get(event, 'property_value');

 return {type, name, value};
}

function replaceInterface(name, content, interfaceDescription) {
 var replaceFn = interfaceDescription.dhcp? formatDhcpConfig : formatConfig;
 return excludeInterface(name, content).trim() + '\n\n' + replaceFn(_.extend({
  name: name
 }, interfaceDescription)) + '\n';
}

function excludeInterface(name, content) {
 var without = _.curry(function (name, content) {
  return !_.includes(content, name);
 });

 return _.chain(content)
  .split('\n\n')
  .filter(without(name))
  .join('\n\n').trim();
}

_
   .chain(events)
   .map((event) => {
    const propertyName = getStringValueForSQL(event.propertyName);
    const propertyValue = getStringValueForSQL(event.propertyValue);
    return `(${event.eventId}, "${event.subscriptionType}", ${propertyName}, ${propertyValue}, ${event.objectId}, ${event.occurredAt})`
   })
   .join(',')
   .value()

/**
 * extract broadcast addr
 * @param  {string} line
 * @return {string,null}      xxx.xxx.xxx.xxx
 */
function getBroadcastAddr(line) {
 if (!_.includes(line, BCAST)) {
  return null;
 }

 // inet adr:1.1.1.77  Bcast:1.1.1.255  Masque:1.1.1.0
 // @todo oh boy. this is ugly.
 return _.chain(line)
  .split(BCAST)
  .slice(1)
  .first()
  .value()
  .substring(1)
  .split(' ')[0];
}

_.chain(os.networkInterfaces())
  .values()
  .flatten()
  .filter(function(val) {
   return (val.family == 'IPv4' && val.internal == false)
  })
  .map('address')
  .first()
  .value()