M-Razavi

mail -s "Subject" -A attach.html [email protected] < messageBodyFile
mail -s "Subject" -A attach.html [email protected] < /dev/null

M-Razavi

travis setup releases --pro --force

M-Razavi

Below are the Big O performance of common functions of different Java Collections.


List                 | Add  | Remove | Get  | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
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

M-Razavi

M-Razavi

M-Razavi

#!/bin/bash

#algorithm  from jdf project(a calender convertor for php.)
#day,month,year and other english var used for miladi and sal mah rooz and ... used for jalali.
#-h (help)  -f(farsi) -d(special date) -s (spliter character) and without option we use finglish and print curent date. 
#default spliter(delimiter) character is "-"
#although -s suport  string but recomended using a character.


date=$(date "+%Y-%m-%d") #set default date

M-Razavi

sbt 'set test in Test := {}' clean assembly

M-Razavi

    ; commands separated by a ; are executed sequentially. The shell waits for each command to terminate in turn.

    && command after && is executed if, and only if, command before && returns an exit status of zero. You can think of it as AND operator.

    | a pipe. In expression command1 | command2 The standard output of command1 is connected via a pipe to the standard input of command2.

There are more similar control operators, worth to mention:

M-Razavi

private static final Date buildDate = getClassBuildTime();

/**
 * Handles files, jar entries, and deployed jar entries in a zip file (EAR).
 * @return The date if it can be determined, or null if not.
 */
private static Date getClassBuildTime() {
    Date d = null;
    Class<?> currentClass = new Object() {}.getClass().getEnclosingClass();
    URL resource = currentClass.getResource(currentClass.getSimpleName() + ".class");

M-Razavi

UBUNTU:
    SSD:
        sudo apt install nvme-cli
        sudo nvme smart-log /dev/nvme0
        # check percentage_used %
      
    Memory:
        1-Turn On or Restart the system
        2-Hold down Shift to bring up the GRUB menu.
        3-Use the arrow keys to move to the entry labeled Ubuntu, memtest86+