Current Dev State

static/js/ketcher2/node_modules/eslint/lib/rules/no-self-compare.js

@@ -0,0 +1,40 @@
+/**
+ * @fileoverview Rule to flag comparison where left part is the same as the right
+ * part.
+ * @author Ilya Volodin
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow comparisons where both sides are exactly the same",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        schema: []
+    },
+
+    create(context) {
+
+        return {
+
+            BinaryExpression(node) {
+                const operators = ["===", "==", "!==", "!=", ">", "<", ">=", "<="];
+
+                if (operators.indexOf(node.operator) > -1 &&
+                    (node.left.type === "Identifier" && node.right.type === "Identifier" && node.left.name === node.right.name ||
+                    node.left.type === "Literal" && node.right.type === "Literal" && node.left.value === node.right.value)) {
+                    context.report({ node, message: "Comparing to itself is potentially pointless." });
+                }
+            }
+        };
+
+    }
+};