mmullis

scala> val target = 8; val l = List(1,2,3,4,4) ; (for(x <- l; y <- l) yield { x + y }).exists(_==target)
target: Int = 8
l: List[Int] = List(1, 2, 3, 4, 4)
res24: Boolean = true

mmullis

# in the instantclient dir with the .so or .dylib files
#go to instantclient dir with the .so files and 
  ln -s libclntsh.so.12.1 libclntsh.so

#on macos:
  ln -s libclntsh.dylib.12.1 libclntsh.dylib

mmullis

#!/bin/bash
export APP_ENV=xyztest
export SBT_OPTS=" -Dpidfile.path=/dev/null  -Dconfig.file=conf/$APP_ENV.conf -Dlogger.resource=logback-${APP_ENV}.xml -Dlogback.configurationFile=conf/logback-${APP_ENV}.xml $SBT_OPTS" 

sbt "; set fork in run := false ; run-main script.MyFooScript"

mmullis

// Something simple to build a useful exception message and avoid NPE from getCause.getMessage

object ExceptionMessageBuilder {
  def mkExceptionMessage(e: Throwable): String = {
    e.getCause match {
      case null         => e.getMessage
      case t: Throwable => s"${e.getMessage} cause:${mkExceptionMessage(t)}"
    }
  }

mmullis

\n
Request Details:\n
            url: %{url_effective}\n
  num_redirects: %{num_redirects}\n
   content_type: %{content_type}\n
  response_code: %{response_code}\n
      remote_ip: %{remote_ip}\n
\n
Timing Analysis:\n
     time_namelookup: %{time_namelookup}\n

mmullis

docker run -d --net=host --cap-add SYS_PTRACE \
           -v /proc:/host/proc:ro \
           -v /sys:/host/sys:ro \
           -p 19999:19999 titpetric/netdata

mmullis

# Connect to ruby process
gdb `which ruby` <pid>

# Run GC
p rb_eval_string("GC.start")

# Count each Object class
p rb_eval_string("$gdb_objs = Hash.new 0")
p rb_eval_string("ObjectSpace.each_object {|o| $gdb_objs[o.class] += 1}")
p rb_eval_string("$stderr.puts($gdb_objs.inspect)")