1 files changed, 24 insertions, 0 deletions
diff --git a/lib/internal/createTester.js b/lib/internal/createTester.js
new file mode 100644
index 0000000..3dbf78d
--- /dev/null
+++ b/lib/internal/createTester.js
@@ -0,0 +1,24 @@
+export default function _createTester(eachfn, check, getResult) {
+    return function(arr, limit, iterator, cb) {
+        function done() {
+            if (cb) cb(getResult(false, void 0));
+        }
+        function iteratee(x, _, callback) {
+            if (!cb) return callback();
+            iterator(x, function (v) {
+                if (cb && check(v)) {
+                    cb(getResult(true, x));
+                    cb = iterator = false;
+                }
+                callback();
+            });
+        }
+        if (arguments.length > 3) {
+            eachfn(arr, limit, iteratee, done);
+        } else {
+            cb = iterator;
+            iterator = limit;
+            eachfn(arr, iteratee, done);
+        }
+    };
+}