How to use

member

function

in

Array

/**
  * Gets the overall set of permissions for a member in this channel, taking into account channel overwrites.
  * @param {GuildMember} member The member to obtain the overall permissions for
  * @returns {Readonly<Permissions>}
  * @private
  */
 memberPermissions(member) {
  if (member.id === this.guild.ownerID) return new Permissions(Permissions.ALL).freeze();

  const roles = member.roles.cache;
  const permissions = new Permissions(roles.map(role => role.permissions));

  if (permissions.has(Permissions.FLAGS.ADMINISTRATOR)) return new Permissions(Permissions.ALL).freeze();

  const overwrites = this.overwritesFor(member, true, roles);

  return permissions
   .remove(overwrites.everyone ? overwrites.everyone.deny : 0)
   .add(overwrites.everyone ? overwrites.everyone.allow : 0)
   .remove(overwrites.roles.length > 0 ? overwrites.roles.map(role => role.deny) : 0)
   .add(overwrites.roles.length > 0 ? overwrites.roles.map(role => role.allow) : 0)
   .remove(overwrites.member ? overwrites.member.deny : 0)
   .add(overwrites.member ? overwrites.member.allow : 0)
   .freeze();
 }