fix: #24 function uniq not working correctly with nullish types

Author: josdejong

src/functions.ts

@@ -248,7 +248,7 @@ export const functions: FunctionBuildersMap = {
       const res: T[] = []
 
       for (const item of data) {
-        if (!res.find((resItem) => isEqual(resItem, item))) {
+        if (res.findIndex((resItem) => isEqual(resItem, item)) === -1) {
           res.push(item)
         }
       }

test-suite/compile.test.json

@@ -1,6 +1,6 @@
 {
-  "source": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.0/test-suite/compile.test.json",
-  "version": "5.0.0",
+  "source": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.1/test-suite/compile.test.json",
+  "version": "5.0.1",
   "groups": [
     {
       "category": "value",
@@ -960,6 +960,17 @@
         }
       ]
     },
+    {
+      "category": "uniq",
+      "description": "should get unique values from a list with mixed nullish types",
+      "tests": [
+        {
+          "input": [null, null, false, 0, "", null, false, 0, ""],
+          "query": ["uniq"],
+          "output": [null, false, 0, ""]
+        }
+      ]
+    },
     {
       "category": "uniqBy",
       "description": "should get unique objects by key (keeping the first)",
@@ -1208,7 +1219,10 @@
         { "input": null, "query": ["eq", true, false], "output": false },
         { "input": null, "query": ["eq", false, true], "output": false },
         { "input": null, "query": ["eq", false, true], "output": false },
-        { "input": null, "query": ["eq", null, null], "output": true }
+        { "input": null, "query": ["eq", false, false], "output": true },
+        { "input": null, "query": ["eq", null, null], "output": true },
+        { "input": null, "query": ["eq", 0, 0], "output": true },
+        { "input": null, "query": ["eq", "", ""], "output": true }
       ]
     },
     {
@@ -1550,7 +1564,11 @@
           "query": ["ne", ["get", "a"], ["get", "b"]],
           "output": true
         },
-        { "input": null, "query": ["ne", 3, 2], "output": true }
+        { "input": null, "query": ["ne", 3, 2], "output": true },
+        { "input": null, "query": ["ne", false, false], "output": false },
+        { "input": null, "query": ["ne", null, null], "output": false },
+        { "input": null, "query": ["ne", 0, 0], "output": false },
+        { "input": null, "query": ["ne", "", ""], "output": false }
       ]
     },
     {

test-suite/compile.test.schema.json

@@ -1,13 +1,13 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema",
-  "$id": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.0/test-suite/compile.test.schema.json",
+  "$id": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.1/test-suite/compile.test.schema.json",
   "type": "object",
   "properties": {
     "source": {
-      "const": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.0/test-suite/compile.test.json"
+      "const": "https://github.com/jsonquerylang/jsonquery/blob/v5.0.1/test-suite/compile.test.json"
     },
     "version": {
-      "const": "5.0.0"
+      "const": "5.0.1"
     },
     "groups": {
       "type": "array",