ESM: Ported SeqUtils operations

src/core/operations/Unique.mjs

@@ -0,0 +1,48 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Utils from "../Utils";
+import {INPUT_DELIM_OPTIONS} from "../lib/Delim";
+
+/**
+ * Unique operation
+ */
+class Unique extends Operation {
+
+    /**
+     * Unique constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Unique";
+        this.module = "Default";
+        this.description = "Removes duplicate strings from the input.";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Delimiter",
+                "type": "option",
+                "value": INPUT_DELIM_OPTIONS
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const delim = Utils.charRep(args[0]);
+        return input.split(delim).unique().join(delim);
+    }
+
+}
+
+export default Unique;