If you are seeing Mongo soft rlimits warnings in your logs, or a WARNING: soft rlimits too low. Number of files is 256, should be at least 1000 when you login to mongo shell via mongo from the commandline, or any mysterious/unexplained mongo connection errors... follow this how-to exactly and it will resolve the issue for you.

(Source of this how to found at

First file: sudo vi /Library/LaunchDaemons/limit.maxfiles.plist


View vim_shortcuts.txt
j k h l - up down left right (by character)
b w - left right (by word)
gg G - bof eof
0 $ - bol eol
^ - bot
shift-% - jump to matching Klammer
ctrl-e - up one line
ctrl-y - down one line
# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key
# that enables you to choose a character from a menu of options. If you are on Lion
# try it by pressing and holding down 'e' in any app that uses the default NSTextField
# for input.
# It's a nice feature and continues the blending of Mac OS X and iOS features. However,
# it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode,
# as it means you cannot press and hold h/j/k/l to move through your file. You have
# to repeatedly press the keys to navigate.

Keybase proof

I hereby claim:

  • I am alissapajer on github.
  • I am alissapajer ( on keybase.
  • I have a public key whose fingerprint is D378 1B6B 4665 571C DD7C 0C64 B9A0 6E42 6439 2BD1

To claim this, I am signing this object:

View gist:50c912d739346c1f00dd
* Exercises explaining covariant and contravariant functors.
* Additionally exercises explaining variance of types over their type parameters.
* Implement the `???` functions. Are all implementable?
trait Functors {
View Why ConcurrentHashMap
import java.util.concurrent.ConcurrentHashMap
object Why {
val data = new ConcurrentHashMap[Int, String]
def update(int: Int, str: String): Unit = {
data.put(int, str)
View IntermHaskell.hs
-- Originally from
class Fluffy f where
furry :: (a -> b) -> f a -> f b
-- Exercise 1
-- Relative Difficulty: 1
instance Fluffy [] where
furry = fmap
View packinglist
pack cover
hiking poles
sleeping bag
sleeping pad
water bottles
water purification system