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for f in *.png
do	
	# Process to get File Name & 2x, 3x file names
	xNAME=`echo "$f" | cut -d'.' -f1`
	cp "$f" "$xNAME@3x.png"
	cp "$f" "$xNAME@2x.png"

	# Set proper resolution to original file
	sips -s dpiHeight 72.0 -s dpiWidth 72.0 "$f"

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Step 1:

bundle init

Step 2:

vi Gemfile

source "https://rubygems.org"

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import 'package:flutter/material.dart';

class CustomCircleAvatar extends StatelessWidget {
  const CustomCircleAvatar(
      {Key? key, required this.height, required this.width, required this.url})
      : super(key: key);
  final double height;
  final double width;
  final String url;

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import 'package:flutter/material.dart';

enum ScreenType {
  desktop,
  tablet,
  handset,
  watch,
}

class FormFactor {

sag333ar

// 4515 seconds to 
// (60 * 60 * 1) + (15 * 60) + (15)
// 01:15:15
class Utilities {
  static String formatTime(int seconds) {
    return '${(Duration(seconds: seconds))}'
      .split('.')[0]
      .padLeft(8, '0');
  }
}

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// get the IP address of current-device
- (NSString *)getIPAddress {
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    // retrieve the current interfaces - returns 0 on success
    success = getifaddrs(&interfaces);
    if (success == 0) {
        // Loop through linked list of interfaces

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/* Original source code courtesy John from iOSDeveloperTips.com */
 
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
 
+ (NSString *)getMacAddress
{
  int mgmtInfoBase[6];

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cp 1024x1024.png AppIcon-20.png
sips -Z 20 AppIcon-20.png

cp 1024x1024.png AppIcon-20@2x.png
sips -Z 40 AppIcon-20@2x.png

cp 1024x1024.png AppIcon-20@3x.png
sips -Z 60 AppIcon-20@3x.png

cp 1024x1024.png AppIcon-29.png

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import requests
import json
import calendar
from datetime import datetime, timedelta

_token = "your token here"
_domain = "your domain here"

if __name__ == '__main__':
    while 1:

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void HelloWorld::createMenuFunction()
{
    // set the font for menu with text
    MenuItemFont::setFontSize(20);

    // create first menu item
    auto menuItemFirst = MenuItemFont::create("First menu item", CC_CALLBACK_1(HelloWorld::firstMenuButtonTapped, this));
    // CC_CALLBACK_1 is a macro which helps to indicate function pointer. Here, on click menu, 
    // 'firstMenuButtonTapped' method will get invoked