Travis build: 1043

test/_30s.js

@@ -260,7 +260,7 @@ const difference = (a, b) => {
 };
 const differenceBy = (a, b, fn) => {
   const s = new Set(b.map(fn));
-  return a.filter(x => !s.has(fn(x)));
+  return a.map(fn).filter(el => !s.has(el));
 };
 const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
 const dig = (obj, target) =>
@@ -341,8 +341,8 @@ const extendHex = shortHex =>
 const factorial = n =>
   n < 0
     ? (() => {
-      throw new TypeError('Negative numbers are not allowed!');
-    })()
+        throw new TypeError('Negative numbers are not allowed!');
+      })()
     : n <= 1
       ? 1
       : n * factorial(n - 1);
@@ -990,9 +990,9 @@ const reject = (pred, array) => array.filter((...args) => !pred(...args));
 const remove = (arr, func) =>
   Array.isArray(arr)
     ? arr.filter(func).reduce((acc, val) => {
-      arr.splice(arr.indexOf(val), 1);
-      return acc.concat(val);
-    }, [])
+        arr.splice(arr.indexOf(val), 1);
+        return acc.concat(val);
+      }, [])
     : [];
 const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '');
 const renameKeys = (keysMap, obj) =>