mirskiy

# Add this to your .bashrc or .bash_aliases
jdiff() {
  # Diff json files faster
  # Uses python json.dump with sort_keys=True to fix ordering, then vimdiff

  if [[ $# -ne 2 ]]; then
    echo "syntax: jdiff file1 file2"
    return
  fi  

mirskiy

# model new insance or update
# http://stackoverflow.com/a/35647389
self._state.adding == True creating
self._state.adding == False updating

mirskiy

from the source:

class RelatedOnlyFieldListFilter(RelatedFieldListFilter):
  def field_choices(self, field, request, model_admin):
    pk_qs = model_admin.get_queryset(request).distinct().values_list('%s__pk' % self.field_path, flat=True)
    return field.get_choices(include_blank=False, limit_choices_to={'pk__in': pk_qs})
    
ex if:
class Author(models.Model):
  country = models.ForeignKey('Country')

mirskiy

sudo apt-get update
sudo apt-get install -y libevent-dev libncurses-dev make
wget https://github.com/tmux/tmux/releases/download/2.2/tmux-2.2.tar.gz
tar xvzf tmux-2.2.tar.gz
cd tmux-2.2/
./configure && make
sudo make install

mirskiy

# detach others
<prefix> D

# resize
<prefix> :resize[-pane] -(U|D|R|L) [numCells]

mirskiy

 1996  sudo hciconfig hci0 up
 1997  sudo hidd --connect 00:22:48:86:E6:CA

mirskiy

## history
# Quick  substitution. Repeat the last command, replacing string1 with string2. Equivalent to ``!!:s/string1/string2/'' (see Modifiers below).
^string1^string2^

# Swap usage
vmstat

# display in hex
echo 'test' | hd