View gen_code_snippet.kt
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// If we use out / in <out T> / <in T> restricts for getter and setter. Also, variance can be used on Classes and Interfaces. | |
abstract class Test<T> { | |
abstract fun getTest(input: T): T | |
} | |
class TestImpAbs : Test<Int>() { | |
override fun getTest(input: Int): Int { | |
return 0 | |
} |
View CodeReferences.kt
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//Earlier Approach: | |
// Receiver | |
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { | |
super.onActivityResult(requestCode, resultCode, data) | |
if(resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE){ | |
val dataStr = data?.getStringExtra("Value") ?:"NO Value" | |
println(dataStr) | |
} | |
} |
View StatehoistingSample.kt
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//Stateful Compose | |
@Composable | |
fun MyCounterStateful() { | |
var vStart by remember { mutableStateOf(5) } | |
var vEnd by remember { mutableStateOf(7) } | |
var noOfTimes by remember { mutableStateOf(0) } | |
ComposePracticesTheme { | |
Column(modifier = Modifier.padding(15.dp)) { | |
Text(text = "Welcome to the Counter") | |
ButtonCounter(noOfTimes) { |
View StatefulSample.kt
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@Composable | |
fun MyCounterStateful() { | |
var vStart by remember { mutableStateOf(5) } | |
var vEnd by remember { mutableStateOf(7) } | |
var noOfTimes by remember { mutableStateOf(0) } | |
ComposePracticesTheme { | |
Column(modifier = Modifier.padding(15.dp)) { | |
Text(text = "Welcome to the Counter") | |
Button(onClick = { | |
noOfTimes++ |
View PaymentProcessDelegation.kt
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package delegation | |
fun main() { | |
println(PaymentProcess(CashPayment()).processPayment()) | |
PaymentProcess.isUPIDown = true | |
println(PaymentProcess(UPIPayment("Tez")).processPayment()) | |
PaymentProcess.isUPIDown = false | |
println(PaymentProcess(UPIPayment("Paytm")).processPayment()) | |
PaymentProcess.isCardDown = true | |
println(PaymentProcess(CardPayment("HDFC", "CC")).processPayment()) |
View PaymentProcessDelegation.java
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package java_comp; | |
class PaymentProcessDelegation { | |
public static void main(String[] args) { | |
new PaymentProcess(new CashPayment()).paymentMode(); | |
System.out.println(new PaymentProcess(new CashPayment()).paymentProcess()); | |
PaymentProcess.isUPIDown = true; | |
System.out.println(new PaymentProcess(new UPIPayment("Tez")).paymentProcess()); | |
PaymentProcess.isUPIDown = false; | |
System.out.println(new PaymentProcess(new UPIPayment("Paytm")).paymentProcess()); |