Separated diffutil callback creation from adapter

core/src/main/kotlin/com/melih/core/extensions/LifecycleExtensions.kt

@@ -25,8 +25,4 @@ fun <T> Fragment.observe(data: LiveData<T>, block: (T) -> Unit) {
 inline fun <reified T : ViewModel> ViewModelProvider.Factory.createFor(
     fragment: Fragment,
     crossinline block: T.() -> Unit = {}
-): T {
+): T = ViewModelProviders.of(fragment, this)[T::class.java].apply(block)
-    val viewModel = ViewModelProviders.of(fragment, this)[T::class.java]
-    viewModel.apply(block)
-    return viewModel
-}

core/src/main/kotlin/com/melih/core/extensions/RecyclerExtensions.kt

@@ -0,0 +1,14 @@
+package com.melih.core.extensions
+
+import androidx.recyclerview.widget.DiffUtil
+
+/**
+ * Get [diff callback][DiffUtil.ItemCallback] for given type based on provided checker
+ */
+fun <T> getDiffCallbackForType(itemCheck: (oldItem: T, newItem: T) -> Boolean) = object : DiffUtil.ItemCallback<T>() {
+    override fun areItemsTheSame(oldItem: T, newItem: T): Boolean =
+        itemCheck(oldItem, newItem)
+
+    override fun areContentsTheSame(oldItem: T, newItem: T): Boolean =
+        itemCheck(oldItem, newItem)
+}

features/launches/src/main/kotlin/com/melih/list/ui/adapters/LaunchesAdapter.kt

@@ -2,21 +2,14 @@ package com.melih.list.ui.adapters
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.recyclerview.widget.DiffUtil
 import com.melih.core.base.recycler.BasePagingListAdapter
 import com.melih.core.base.recycler.BaseViewHolder
+import com.melih.core.extensions.getDiffCallbackForType
 import com.melih.list.databinding.LaunchRowBinding
 import com.melih.repository.entities.LaunchEntity
 
 class LaunchesAdapter(itemClickListener: (LaunchEntity) -> Unit) : BasePagingListAdapter<LaunchEntity>(
-    object : DiffUtil.ItemCallback<LaunchEntity>() {
+    getDiffCallbackForType { oldItem, newItem -> oldItem.id == newItem.id },
-        override fun areItemsTheSame(oldItem: LaunchEntity, newItem: LaunchEntity): Boolean =
-            oldItem.id == newItem.id
-
-        override fun areContentsTheSame(oldItem: LaunchEntity, newItem: LaunchEntity): Boolean =
-            oldItem.name == newItem.name
-
-    },
     itemClickListener
 ) {
     override fun createViewHolder(