#178 Sequence

README.md

@@ -9,6 +9,9 @@
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+### [#178 Sequence](/codes/Sequence.kt)
+![alt text](/screenshots/Sequence.png)
+
 ### [#177 Transient Annotation](/codes/Transient.kt)
 ![alt text](/screenshots/Transient.png)
 

codes/Sequence.kt

@@ -0,0 +1,31 @@
+fun main() {
+
+}
+
+val data = mutableListOf<Int>()
+
+fun initData() {
+    data.clear()
+    System.gc()
+    for (i in 0..1_000_000) {
+        data.add(i)
+    }
+}
+
+// When you process a bigger collection with more than one processing step,
+// it will take more time.
+fun processCollectionWithoutSequence() {
+    data.filter { it % 2 == 0 }.forEach {
+
+    }
+}
+
+// Use Sequence for bigger collections with more than one processing.
+
+// Sequence are more efficient and faster for collection processing
+// with more than single processing step.
+fun processCollectionWithSequence() {
+    data.asSequence().filter { it % 2 == 0 }.forEach {
+
+    }
+}