vemarav

require 'aws-sdk'

ses = AWS.ses
AWS.config(
:access_key_id     => '..',
:secret_access_key => '..,
:server => '..')
#puts ses.identities.map(:&identity)
ses.send_email(subject: "Hi",
               from: "aravind@classpro.in",

vemarav

begin
  # code that raise an error 
  # or an exception
rescue Exception => e
  # e is an Exception object contains
  # information of the error
  # e.message is the information
  # about why error occurred and
  # which object caused the error,
  # where e.backtrace(Array) holds

vemarav

begin
  # code that raise an Error
  # or an Exception
rescue StandardError => e
  # Exceptions are not rescued. But,
  # StandardError and subclasses
  # of StandardError are rescued
  puts e.message, e.backtrace, 
  # puts e.full_message, e.backtrace_locations
end

vemarav

begin
  puts "a" * 5 # => "aaaaa"
  puts 1 + ""  # => TypeError (string can't be coerced into Integer)
  puts 5 * "a" # => Never Evaluate
rescue TypeError => e
  puts e.message, e.backtrace
end

vemarav

# let say you have a class Game and its Audio
module Audio
  class NoDeviceError < Error::ENODEV # (No such device)
  end
end


class Game
  include Audio
  

vemarav

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'auth_utils.dart';

class NetworkUtils {
	static final String host = productionHost;
	static final String productionHost = 'https://authflow.herokuapp.com';
	static final String developmentHost = 'http://192.168.31.110:3000';

vemarav

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'auth_utils.dart';

class NetworkUtils {
	static final String host = productionHost;
	static final String productionHost = 'https://authflow.herokuapp.com';
	static final String developmentHost = 'http://192.168.31.110:3000';

vemarav

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'auth_utils.dart';

class NetworkUtils {
	static final String host = productionHost;
	static final String productionHost = 'https://authflow.herokuapp.com';
	static final String developmentHost = 'http://192.168.31.110:3000';

vemarav

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'auth_utils.dart';

class NetworkUtils {
	static final String host = productionHost;
	static final String productionHost = 'https://authflow.herokuapp.com';
	static final String developmentHost = 'http://192.168.31.110:3000';

vemarav

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import 'auth_utils.dart';

class NetworkUtils {
	static final String host = productionHost;
	static final String productionHost = 'https://authflow.herokuapp.com';
	static final String developmentHost = 'http://192.168.31.110:3000';