Christian Melchior cmelchior

## titanic.csv

          
            PassengerId
            Survived
            Pclass
            Name
            Sex
            Age
            SibSp
            Parch
            Ticket
            Fare
            Cabin
            Embarked

            
              1
              0
              3
              Braund, Mr. Owen Harris
              male
              22
              1
              0
              A/5 21171
              7.25
              
              S

            
              2
              1
              1
              Cumings, Mrs. John Bradley (Florence Briggs Thayer)
              female
              38
              1
              0
              PC 17599
              71.2833
              C85
              C

            
              3
              1
              3
              Heikkinen, Miss. Laina
              female
              26
              0
              0
              STON/O2. 3101282
              7.925
              
              S

            
              4
              1
              1
              Futrelle, Mrs. Jacques Heath (Lily May Peel)
              female
              35
              1
              0
              113803
              53.1
              C123
              S

            
              5
              0
              3
              Allen, Mr. William Henry
              male
              35
              0
              0
              373450
              8.05
              
              S

            
              6
              0
              3
              Moran, Mr. James
              male
              
              0
              0
              330877
              8.4583
              
              Q

            
              7
              0
              1
              McCarthy, Mr. Timothy J
              male
              54
              0
              0
              17463
              51.8625
              E46
              S

            
              8
              0
              3
              Palsson, Master. Gosta Leonard
              male
              2
              3
              1
              349909
              21.075
              
              S

            
              9
              1
              3
              Johnson, Mrs. Oscar W (Elisabeth Vilhelmina Berg)
              female
              27
              0
              2
              347742
              11.1333
              
              S

## Imager.kt
package dk.ilios.jervis.ui

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier

## VersionPinning.kt
// BAD: Store a global managed object
MyApp.GLOBAL_OBJECT = realm.objects(Person::class).first()

// BETTER: Copy data out into an unmanaged object
val person = realm.objects(Person::class).first()
MyApp.GLOBAL_OBJECT = Person(person.name)

## VersionMismatch.kt
// A write can now happen between two queries
val results1: RealmResults<Person> = realm.objects(Person::class)
val results2: RealmResults<Person> = realm.objects(Person::class)

// Resulting in subsequent queries not returning the same result
results1.version() != results2.version()
results1.size != results2.size

## ThreadsafeObservers.kt
val jane = getJane()
CoroutineScope(Dispatchers.Main).launch {

   // Run mapping/transform logic in the background
   val flow: Flow<String> = jane.observe()
       .filter { it.name.startsWith("Jane") }
       .flowOn(Dispatchers.Unconfined)

   // Before collecting on the UI thread
   flow.collect {

## ObservingChanges.kt
val jane = getJane()
CoroutineScope(Dispatchers.Main).launch {
   // Updates are observed using Kotlin Flow
   val flow: Flow<Person> = jane.observe()
   flow.collect {
       // Listen to changes to the object
       println(it.name)
   }
}

## UpdatingData.kt
CoroutineScope(Dispatchers.Main).launch {
   // Create initial object
   val jane = realm.write {
       copyToRealm(Person("Jane"))
   }

   realm.write {
       // Find latest version and update it
       // Note, this always involves a null-check
       // as another thread might have deleted the

## SuspendableWrite.kt
CoroutineScope(Dispatchers.Main).launch {

   // Write automatically happens on a background dispatcher
   val jane = realm.write {
       val unmanaged = Person("Jane")
       // Add unmanaged objects
       copyToRealm(unmanaged)
   }

   // Objects returned from writes are automatically frozen

## BlockingWrite.kt
val jane = realm.writeBlocking {
   val unmanaged = Person("Jane")
   copyToRealm(unmanaged)
}

## ClosingRealms.kt
// Close Realm to free native resources
realm.close()
PassengerId	Survived	Pclass	Name	Sex	Age	SibSp	Parch	Ticket	Fare	Cabin	Embarked
1	0	3	Braund, Mr. Owen Harris	male	22	1	0	A/5 21171	7.25		S
2	1	1	Cumings, Mrs. John Bradley (Florence Briggs Thayer)	female	38	1	0	PC 17599	71.2833	C85	C
3	1	3	Heikkinen, Miss. Laina	female	26	0	0	STON/O2. 3101282	7.925		S
4	1	1	Futrelle, Mrs. Jacques Heath (Lily May Peel)	female	35	1	0	113803	53.1	C123	S
5	0	3	Allen, Mr. William Henry	male	35	0	0	373450	8.05		S
6	0	3	Moran, Mr. James	male		0	0	330877	8.4583		Q
7	0	1	McCarthy, Mr. Timothy J	male	54	0	0	17463	51.8625	E46	S
8	0	3	Palsson, Master. Gosta Leonard	male	2	3	1	349909	21.075		S
9	1	3	Johnson, Mrs. Oscar W (Elisabeth Vilhelmina Berg)	female	27	0	2	347742	11.1333		S
	package dk.ilios.jervis.ui

	import androidx.compose.foundation.background
	import androidx.compose.foundation.layout.Box
	import androidx.compose.foundation.layout.fillMaxSize
	import androidx.compose.foundation.layout.padding
	import androidx.compose.material.Text
	import androidx.compose.runtime.Composable
	import androidx.compose.ui.Alignment
	import androidx.compose.ui.Modifier
	// BAD: Store a global managed object
	MyApp.GLOBAL_OBJECT = realm.objects(Person::class).first()

	// BETTER: Copy data out into an unmanaged object
	val person = realm.objects(Person::class).first()
	MyApp.GLOBAL_OBJECT = Person(person.name)
	// A write can now happen between two queries
	val results1: RealmResults<Person> = realm.objects(Person::class)
	val results2: RealmResults<Person> = realm.objects(Person::class)

	// Resulting in subsequent queries not returning the same result
	results1.version() != results2.version()
	results1.size != results2.size
	val jane = getJane()
	CoroutineScope(Dispatchers.Main).launch {

	// Run mapping/transform logic in the background
	val flow: Flow<String> = jane.observe()
	.filter { it.name.startsWith("Jane") }
	.flowOn(Dispatchers.Unconfined)

	// Before collecting on the UI thread
	flow.collect {
	val jane = getJane()
	CoroutineScope(Dispatchers.Main).launch {
	// Updates are observed using Kotlin Flow
	val flow: Flow<Person> = jane.observe()
	flow.collect {
	// Listen to changes to the object
	println(it.name)
	}
	}
	CoroutineScope(Dispatchers.Main).launch {
	// Create initial object
	val jane = realm.write {
	copyToRealm(Person("Jane"))
	}

	realm.write {
	// Find latest version and update it
	// Note, this always involves a null-check
	// as another thread might have deleted the
	CoroutineScope(Dispatchers.Main).launch {

	// Write automatically happens on a background dispatcher
	val jane = realm.write {
	val unmanaged = Person("Jane")
	// Add unmanaged objects
	copyToRealm(unmanaged)
	}

	// Objects returned from writes are automatically frozen
	val jane = realm.writeBlocking {
	val unmanaged = Person("Jane")
	copyToRealm(unmanaged)
	}