ArisAgnew

Big O performance of common functions of different Java Collections.

List	Add	Remove	Get/Read	Contains	Next	Data Structure
[]	O(n)	O(n)	O(1)	O(n)	O(1)	Array
List	O(1)*	O(n)	O(n)	O(n)	O(1)	Array
ArrayList	O(1)	O(n)	O(1)	O(n)	O(1)	Array
LinkedList	O(1)	O(1)	O(n)	O(n)	O(1)	Linked List
CopyOnWriteArrayList	O(n)	O(n)	O(1)	O(n)	O(1)	Array

aimtiaz11

Adding Timer Variables in Mule Flows

Adding timer variables in Mule flows to check for performance bottlenecks.

Setting Timer Variable set-variable

<set-variable value="#[%dw 2.0 import currentMilliseconds from dw::util::Timer --- currentMilliseconds()]" 
              variableName="http_before" doc:name="http_before" mimeType="application/java"/>

aimtiaz11

curl -Iso /dev/null -w "%{http_code}\n" -k https://www.google.com.au

aimtiaz11

/**
* Usage: groovy compare-list.groovy first.txt second.txt
**/

def sourceList = []

new File(  args[0] ).eachLine { line ->
    sourceList << line.trim()
}

aimtiaz11

Decoding a JWT Payload with your Shell (bash, zsh...)

Add this to your .profile, .bashrc, .zshrc...

decode_base64_url() {
  local len=$((${#1} % 4))
  local result="$1"
  if [ $len -eq 2 ]; then result="$1"'=='
  elif [ $len -eq 3 ]; then result="$1"'=' 
 fi