pierric

m = HashMap.fromList [
  ("X", HashMap.fromList [("a", 0), ("b", 1)]),
  ("Y", HashMap.fromList [("a", 1)]),
  ("Z", HashMap.fromList [("b", 2)])
  ]
  
I want to extract all value with key "a" in the nested HashMap, and keep the root key.
  
> m ^.. (itraversed <. at "a" . folded) . withIndex

pierric

# list all the color node in the json file (recursively)
python -m jsmin <json_file> | jq '.. | .color? | select (. != null) | keys | .[]'

# list all and remove duplicated items.
python -m jsmin <json_file> | jq '[.. | .color? | select (. != null) | keys | .[]] | unique | .[]'

pierric

arr = cv2.imread('img', -1)
arr[numpy.where((arr == [0,0,0]).all(axis=2))] = [0, 255, 0]

pierric

import mxnet as mx
import itertools
import numpy as np
from collections import namedtuple

ctx = mx.cpu()

def load(prefix):
    symbol = mx.sym.load('%s.json' % prefix)
    save_dict = mx.nd.load('%s.params' % prefix)

pierric

from SPARQLWrapper import SPARQLWrapper, JSON
import requests
from urllib.request import unquote

#   PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
#   PREFIX dbpprop: <http://dbpedia.org/property/>
#   PREFIX dbres: <http://dbpedia.org/resource/>
#
#   SELECT ?abstract WHERE {
#    dbres:Abijah_Beckwith_(Wisconsin) dbpedia-owl:abstract ?abstract.

pierric

#! /bin/bash

includes=()
excludes=()

notMember () { for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 1; done; return 0; }

while getopts ":e:i:" opt; do
  case $opt in
    e)

pierric

jiasen@jiasen-home:~/Workspace/sandbox$ stack exec -- cabal init
cabal: Use of GHC's environment variable GHC_PACKAGE_PATH is incompatible with
Cabal. Use the flag --package-db to specify a package database (it can be used
multiple times).

jiasen@jiasen-home:~/Workspace/sandbox$ stack exec --no-ghc-package-path -- cabal init
Warning: The package list for 'hackage.haskell.org' does not exist. Run 'cabal

pierric

./etcdctl --endpoints "https://127.0.0.1:2379" \
          --ca-file /etc/kubernetes/ssl/kube-ca.pem \
          --cert-file /etc/kubernetes/ssl/kube-node.pem \
          --key-file /etc/kubernetes/ssl/kube-node-key.pem \
          cluster-health

pierric

turn off journal of ext4

sudo tune2fs -O ^has_journal $SSD_DRIVE

enable periodical trim

cp /usr/share/doc/util-linux/examples/fstrim.{service,timer} /etc/systemd/system
systemctl enable fstrim.timer

pierric

iptables --policy INPUT   ACCEPT;
iptables --policy OUTPUT  ACCEPT;
iptables --policy FORWARD ACCEPT;
iptables -Z; # zero counters
iptables -F; # flush (delete) rules
iptables -X; # delete all extra chains
systemctl restart docker;