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<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <Style TargetType="ComboBox">
            <Setter Property="Template">

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var text = "some text";
final snackBar = SnackBar(
  content: Text("Snack: $text"),
  action: SnackBarAction(
    label: 'Undo',
    onPressed: () {
      // Some code to undo the change!
    },
  ),
);

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  GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: scaffoldKey,
...
      scaffoldKey.currentState.showSnackBar(SnackBar(content: Text("some text")));

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# Based on https://www.coursera.org/learn/introduction-tensorflow/home/welcome
# Course 1 - Part 4 - Lesson 2 - Notebook

#https://github.com/zalandoresearch/fashion-mnist

import tensorflow as tf
from tensorflow import keras
mnist = keras.datasets.fashion_mnist
(training_images, training_labels), (test_images, test_labels) = mnist.load_data()
import matplotlib.pyplot as plt

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import tensorflow as tf
import numpy as np
import matplotlib.pyplot as plt
from tensorflow import keras

mnist = keras.datasets.mnist
(training_images, training_labels), (test_images, test_labels) = mnist.load_data()

#plt.imshow(test_images[0])
class FitCallback(tf.keras.callbacks.Callback):

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//In the test class
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.LambdaLogger;
import org.junit.runner.RunWith;
import org.mockito.junit.MockitoJUnitRunner;
import org.mockito.Mock;
import org.junit.Before;
import org.junit.Test;
import static org.mockito.Mockito.when;
import static org.mockito.Mockito.doAnswer;

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{
  "string_value": "some text",
  "int_value": "123",
  "float_value":"12.345",
  "bool_value": "true",
  "date_value": "2019-05-10T10:20:35.000+0",
  "array_value": [1,2,3,4,5],
  "object_value": { 
                    "int_field": "789", 
                    "string_field": "object's text"

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/*
https://github.com/FasterXML/jackson
Grade.build
dependencies {
	compile group:'com.fasterxml.jackson', name:'jackson-bom', version: '2.9.8'
}

Input:
{ "first_name" : "John", "last_name" : "Smith" }
{ "first_name" : "John" }

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dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
    compile group: 'com.amazon.alexa', name: 'ask-sdk', version:'2.17.2'
    compile group: 'com.amazonaws', name: 'aws-lambda-java-log4j2', version:'1.1.0'
}
jar {
    from {
        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
    }
}

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"events": {
  "publications": [
    { "eventName": "AMAZON.OrderStatus.Updated" },
    { "eventName": "AMAZON.MediaContent.Available" }
  ],
  "endpoint": {
    "uri": "YOUR-AWS-LAMBDA-FUNCTION-ARN"
  }
}