add nextflow d30e48d

nextflow/tests/type-annotations.nf

@@ -0,0 +1,42 @@
+#!/usr/bin/env nextflow
+/*
+ * Copyright 2013-2024, Seqera Labs
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+nextflow.enable.types = true
+
+workflow {
+    ch_words = channel.of('one', 'two', 'three', 'four')
+    val_counts = COUNT(ch_words)
+    val_counts.view { counts ->
+        def even = counts.findAll { n -> isEven(n) }.size()
+        println "counts: $counts ($even are even)"
+    }
+}
+
+workflow COUNT {
+    take:
+    words: Channel<String>
+
+    main:
+    counts = words.map { word -> word.length() }.collect()
+
+    emit:
+    counts: Value<Integer> = counts
+}
+
+def isEven(n: Integer) -> Boolean {
+    return n % 2 == 0
+}