youndon

import androidx.compose.material3.MaterialTheme
import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.Color

class MaterialColors {

    companion object {
        const val SURFACE = "SURFACE"
        const val INVERSE_SURFACE = "INVERSE_SURFACE"
        const val ON_SURFACE = "ON_SURFACE"

youndon

import java.util.*
import kotlin.collections.ArrayList

fun main() {

    // The Array work like the variable,
    // but the variable store one value in each time,
    // the array can store many many many values in the same time.

    //Note : index of the array begin from the '0'.

youndon

@file:Suppress("CAST_NEVER_SUCCEEDS")


fun main() {
    /** String Attachments */
    val a = "string"

                       .substring() // for print the string as range (start,end).
                       .substringAfter() // for remove all the string before the first delimiter in the string.
                       .substringAfterLast() // for remove all the string before the last delimiter in the string