Merge pull request #1528 from bfred-it/drop-lodash

Drop lodash

44 files changed, 103 insertions, 102 deletions

diff --git a/Makefile b/Makefile
index 8880e02..d3b00e9 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,6 @@ PACKAGE = asyncjs
 REQUIRE_NAME = async
 UGLIFY = uglifyjs
 XYZ = support/xyz.sh --repo git@github.com:caolan/async.git
-COPY_ES = sed -E "s/(import.+)lodash/\1lodash-es/g"
 
 BUILDDIR = build
 BUILD_ES = build-es
@@ -95,12 +94,12 @@ build-es: $(ES_MODULES)
 
 $(BUILD_ES)/%.js: lib/%.js
 	mkdir -p "$(@D)"
-	$(COPY_ES) $< > $@
+	cat $< > $@
 
 define COPY_ES_ALIAS
 $A: $(shell node $(SCRIPTS)/get-alias.js $A)
 	mkdir -p "$$(@D)"
-	$(COPY_ES) $$< > $$@
+	cat $$< > $$@
 endef
 $(foreach A,$(ALIAS_ES),$(eval $(COPY_ES_ALIAS)))
 
diff --git a/lib/asyncify.js b/lib/asyncify.js
index d5d0bee..e6d63c0 100644
--- a/lib/asyncify.js
+++ b/lib/asyncify.js
@@ -1,4 +1,3 @@
-import isObject from 'lodash/isObject';
 import initialParams from './internal/initialParams';
 import setImmediate from './internal/setImmediate';
 
@@ -67,7 +66,7 @@ export default function asyncify(func) {
             return callback(e);
         }
         // if result is Promise object
-        if (isObject(result) && typeof result.then === 'function') {
+        if (result && typeof result.then === 'function') {
             result.then(function(value) {
                 invokeCallback(callback, null, value);
             }, function(err) {
diff --git a/lib/auto.js b/lib/auto.js
index e2c0ab9..a6150aa 100644
--- a/lib/auto.js
+++ b/lib/auto.js
@@ -1,10 +1,6 @@
-import arrayEach from 'lodash/_arrayEach';
-import forOwn from 'lodash/_baseForOwn';
-import indexOf from 'lodash/_baseIndexOf';
-import isArray from 'lodash/isArray';
-import okeys from 'lodash/keys';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 
+import forOwn from './internal/forOwn';
 import slice from './internal/slice';
 import once from './internal/once';
 import onlyOnce from './internal/onlyOnce';
@@ -96,8 +92,7 @@ export default function (tasks, concurrency, callback) {
         concurrency = null;
     }
     callback = once(callback || noop);
-    var keys = okeys(tasks);
-    var numTasks = keys.length;
+    var numTasks = Object.keys(tasks).length;
     if (!numTasks) {
         return callback(null);
     }
@@ -119,7 +114,7 @@ export default function (tasks, concurrency, callback) {
     var uncheckedDependencies = {};
 
     forOwn(tasks, function (task, key) {
-        if (!isArray(task)) {
+        if (!Array.isArray(task)) {
             // no dependencies
             enqueueTask(key, [task]);
             readyToCheck.push(key);
@@ -135,7 +130,7 @@ export default function (tasks, concurrency, callback) {
         }
         uncheckedDependencies[key] = remainingDependencies;
 
-        arrayEach(dependencies, function (dependencyName) {
+        dependencies.forEach(function (dependencyName) {
             if (!tasks[dependencyName]) {
                 throw new Error('async.auto task `' + key +
                     '` has a non-existent dependency `' +
@@ -182,7 +177,7 @@ export default function (tasks, concurrency, callback) {
 
     function taskComplete(taskName) {
         var taskListeners = listeners[taskName] || [];
-        arrayEach(taskListeners, function (fn) {
+        taskListeners.forEach(function (fn) {
             fn();
         });
         processQueue();
@@ -231,7 +226,7 @@ export default function (tasks, concurrency, callback) {
         while (readyToCheck.length) {
             currentTask = readyToCheck.pop();
             counter++;
-            arrayEach(getDependents(currentTask), function (dependent) {
+            getDependents(currentTask).forEach(function (dependent) {
                 if (--uncheckedDependencies[dependent] === 0) {
                     readyToCheck.push(dependent);
                 }
@@ -248,7 +243,7 @@ export default function (tasks, concurrency, callback) {
     function getDependents(taskName) {
         var result = [];
         forOwn(tasks, function (task, key) {
-            if (isArray(task) && indexOf(task, taskName, 0) >= 0) {
+            if (Array.isArray(task) && task.indexOf(taskName) >= 0) {
                 result.push(key);
             }
         });
diff --git a/lib/autoInject.js b/lib/autoInject.js
index bc8ddd6..65b2cfb 100644
--- a/lib/autoInject.js
+++ b/lib/autoInject.js
@@ -1,8 +1,5 @@
 import auto from './auto';
-import forOwn from 'lodash/_baseForOwn';
-import arrayMap from 'lodash/_arrayMap';
-import isArray from 'lodash/isArray';
-import trim from 'lodash/trim';
+import forOwn from './internal/forOwn';
 import wrapAsync from './internal/wrapAsync';
 import { isAsync } from './internal/wrapAsync';
 
@@ -16,7 +13,7 @@ function parseParams(func) {
     func = func.match(FN_ARGS)[2].replace(' ', '');
     func = func ? func.split(FN_ARG_SPLIT) : [];
     func = func.map(function (arg){
-        return trim(arg.replace(FN_ARG, ''));
+        return arg.replace(FN_ARG, '').trim();
     });
     return func;
 }
@@ -113,7 +110,7 @@ export default function autoInject(tasks, callback) {
             (!fnIsAsync && taskFn.length === 1) ||
             (fnIsAsync && taskFn.length === 0);
 
-        if (isArray(taskFn)) {
+        if (Array.isArray(taskFn)) {
             params = taskFn.slice(0, -1);
             taskFn = taskFn[taskFn.length - 1];
 
@@ -134,7 +131,7 @@ export default function autoInject(tasks, callback) {
         }
 
         function newTask(results, taskCb) {
-            var newArgs = arrayMap(params, function (name) {
+            var newArgs = params.map(function (name) {
                 return results[name];
             });
             newArgs.push(taskCb);
diff --git a/lib/concatLimit.js b/lib/concatLimit.js
index 4df03ea..cec4e2b 100644
--- a/lib/concatLimit.js
+++ b/lib/concatLimit.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import wrapAsync from './internal/wrapAsync';
 import slice from './internal/slice';
 import mapLimit from './mapLimit';
diff --git a/lib/detect.js b/lib/detect.js
index 654a370..c37ff91 100644
--- a/lib/detect.js
+++ b/lib/detect.js
@@ -1,5 +1,4 @@
-import identity from 'lodash/identity';
-
+import identity from './internal/identity';
 import createTester from './internal/createTester';
 import doParallel from './internal/doParallel';
 import findGetResult from './internal/findGetResult';
diff --git a/lib/detectLimit.js b/lib/detectLimit.js
index bba10c8..4efdd3a 100644
--- a/lib/detectLimit.js
+++ b/lib/detectLimit.js
@@ -1,5 +1,4 @@
-import identity from 'lodash/identity';
-
+import identity from './internal/identity';
 import createTester from './internal/createTester';
 import doParallelLimit from './internal/doParallelLimit';
 import findGetResult from './internal/findGetResult';
diff --git a/lib/doDuring.js b/lib/doDuring.js
index cce61d0..ac2a04c 100644
--- a/lib/doDuring.js
+++ b/lib/doDuring.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import slice from './internal/slice';
 import onlyOnce from './internal/onlyOnce';
 import wrapAsync from './internal/wrapAsync';
diff --git a/lib/doWhilst.js b/lib/doWhilst.js
index 5e7d259..3c2b865 100644
--- a/lib/doWhilst.js
+++ b/lib/doWhilst.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import slice from './internal/slice';
 
 import onlyOnce from './internal/onlyOnce';
diff --git a/lib/during.js b/lib/during.js
index ae5a4c1..cda9979 100644
--- a/lib/during.js
+++ b/lib/during.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import onlyOnce from './internal/onlyOnce';
 import wrapAsync from './internal/wrapAsync';
 
diff --git a/lib/eachOf.js b/lib/eachOf.js
index 9ab3eb6..bb9edfa 100644
--- a/lib/eachOf.js
+++ b/lib/eachOf.js
@@ -1,9 +1,8 @@
-import isArrayLike from 'lodash/isArrayLike';
-
+import isArrayLike from './internal/isArrayLike';
 import breakLoop from './internal/breakLoop';
 import eachOfLimit from './eachOfLimit';
 import doLimit from './internal/doLimit';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import once from './internal/once';
 import onlyOnce from './internal/onlyOnce';
 import wrapAsync from './internal/wrapAsync';
diff --git a/lib/forever.js b/lib/forever.js
index f7be0b2..3753251 100644
--- a/lib/forever.js
+++ b/lib/forever.js
@@ -1,5 +1,4 @@
-import noop from 'lodash/noop';
-
+import noop from './internal/noop';
 import onlyOnce from './internal/onlyOnce';
 import ensureAsync from './ensureAsync';
 import wrapAsync from './internal/wrapAsync';
diff --git a/lib/groupByLimit.js b/lib/groupByLimit.js
index b0a5ef3..e6bbf8e 100644
--- a/lib/groupByLimit.js
+++ b/lib/groupByLimit.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import mapLimit from './mapLimit';
 import wrapAsync from './internal/wrapAsync';
 /**
diff --git a/lib/internal/consoleFunc.js b/lib/internal/consoleFunc.js
index eb2e886..c977647 100644
--- a/lib/internal/consoleFunc.js
+++ b/lib/internal/consoleFunc.js
@@ -1,4 +1,3 @@
-import arrayEach from 'lodash/_arrayEach';
 import slice from './slice';
 import wrapAsync from './wrapAsync';
 
@@ -13,7 +12,7 @@ export default function consoleFunc(name) {
                         console.error(err);
                     }
                 } else if (console[name]) {
-                    arrayEach(args, function (x) {
+                    args.forEach(function (x) {
                         console[name](x);
                     });
                 }
diff --git a/lib/internal/createTester.js b/lib/internal/createTester.js
index 9fc03e1..8786833 100644
--- a/lib/internal/createTester.js
+++ b/lib/internal/createTester.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './noop';
 import breakLoop from './breakLoop';
 
 export default function _createTester(check, getResult) {
diff --git a/lib/internal/eachOfLimit.js b/lib/internal/eachOfLimit.js
index 0a1f5bc..6ce0762 100644
--- a/lib/internal/eachOfLimit.js
+++ b/lib/internal/eachOfLimit.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './noop';
 import once from './once';
 
 import iterator from './iterator';
diff --git a/lib/internal/filter.js b/lib/internal/filter.js
index 032bd33..1923264 100644
--- a/lib/internal/filter.js
+++ b/lib/internal/filter.js
@@ -1,7 +1,6 @@
-import arrayMap from 'lodash/_arrayMap';
-import isArrayLike from 'lodash/isArrayLike';
-import property from 'lodash/_baseProperty';
-import noop from 'lodash/noop';
+import isArrayLike from './isArrayLike';
+import property from './property';
+import noop from './noop';
 
 import wrapAsync from './wrapAsync';
 
@@ -39,9 +38,9 @@ function filterGeneric(eachfn, coll, iteratee, callback) {
         if (err) {
             callback(err);
         } else {
-            callback(null, arrayMap(results.sort(function (a, b) {
+            callback(null, results.sort(function (a, b) {
                 return a.index - b.index;
-            }), property('value')));
+            }).map(property('value')));
         }
     });
 }
diff --git a/lib/internal/forOwn.js b/lib/internal/forOwn.js
new file mode 100644
index 0000000..ea16519
--- /dev/null
+++ b/lib/internal/forOwn.js
@@ -0,0 +1,8 @@
+export default function forOwn(object, callback) {
+    if (!object) {
+        return;
+    }
+    Object.keys(object).forEach(function (key) {
+        callback(object[key], key);
+    });
+}
diff --git a/lib/internal/identity.js b/lib/internal/identity.js
new file mode 100644
index 0000000..7e6669d
--- /dev/null
+++ b/lib/internal/identity.js
@@ -0,0 +1,3 @@
+export default function identity(value) {
+    return value;
+}
diff --git a/lib/internal/isArrayLike.js b/lib/internal/isArrayLike.js
new file mode 100644
index 0000000..f3d0f5e
--- /dev/null
+++ b/lib/internal/isArrayLike.js
@@ -0,0 +1,6 @@
+export default function isArrayLike(value) {
+    return value &&
+        typeof value.length === 'number' &&
+        value.length >= 0 &&
+        value.length % 1 === 0;
+}
diff --git a/lib/internal/iterator.js b/lib/internal/iterator.js
index 15c6fdd..6555187 100644
--- a/lib/internal/iterator.js
+++ b/lib/internal/iterator.js
@@ -1,6 +1,5 @@
-import isArrayLike from 'lodash/isArrayLike';
+import isArrayLike from './isArrayLike';
 import getIterator from './getIterator';
-import keys from 'lodash/keys';
 
 function createArrayIterator(coll) {
     var i = -1;
@@ -22,7 +21,7 @@ function createES2015Iterator(iterator) {
 }
 
 function createObjectIterator(obj) {
-    var okeys = keys(obj);
+    var okeys = obj ? Object.keys(obj) : [];
     var i = -1;
     var len = okeys.length;
     return function next() {
diff --git a/lib/internal/map.js b/lib/internal/map.js
index 9cd927e..c7f64dd 100644
--- a/lib/internal/map.js
+++ b/lib/internal/map.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './noop';
 import wrapAsync from './wrapAsync';
 
 export default function _asyncMap(eachfn, arr, iteratee, callback) {
diff --git a/lib/internal/noop.js b/lib/internal/noop.js
new file mode 100644
index 0000000..ca6a744
--- /dev/null
+++ b/lib/internal/noop.js
@@ -0,0 +1 @@
+export default function noop() {}
diff --git a/lib/internal/parallel.js b/lib/internal/parallel.js
index f4e9347..bbfdb42 100644
--- a/lib/internal/parallel.js
+++ b/lib/internal/parallel.js
@@ -1,5 +1,5 @@
-import noop from 'lodash/noop';
-import isArrayLike from 'lodash/isArrayLike';
+import isArrayLike from './isArrayLike';
+import noop from './noop';
 import slice from './slice';
 import wrapAsync from './wrapAsync';
 
diff --git a/lib/internal/property.js b/lib/internal/property.js
new file mode 100644
index 0000000..567b3c3
--- /dev/null
+++ b/lib/internal/property.js
@@ -0,0 +1,5 @@
+export default function property(property) {
+    return function (object) {
+        return object[property];
+    }
+}
diff --git a/lib/internal/queue.js b/lib/internal/queue.js
index 1a3f4cb..575497b 100644
--- a/lib/internal/queue.js
+++ b/lib/internal/queue.js
@@ -1,7 +1,4 @@
-import indexOf from 'lodash/_baseIndexOf';
-import isArray from 'lodash/isArray';
-import noop from 'lodash/noop';
-
+import noop from './noop';
 import onlyOnce from './onlyOnce';
 import setImmediate from './setImmediate';
 import DLL from './DoublyLinkedList';
@@ -25,7 +22,7 @@ export default function queue(worker, concurrency, payload) {
             throw new Error('task callback must be a function');
         }
         q.started = true;
-        if (!isArray(data)) {
+        if (!Array.isArray(data)) {
             data = [data];
         }
         if (data.length === 0 && q.idle()) {
@@ -64,7 +61,7 @@ export default function queue(worker, concurrency, payload) {
             for (var i = 0, l = tasks.length; i < l; i++) {
                 var task = tasks[i];
 
-                var index = indexOf(workersList, task, 0);
+                var index = workersList.indexOf(task);
                 if (index === 0) {
                     workersList.shift();
                 } else if (index > 0) {
diff --git a/lib/internal/range.js b/lib/internal/range.js
new file mode 100644
index 0000000..c9033e5
--- /dev/null
+++ b/lib/internal/range.js
@@ -0,0 +1,7 @@
+export default function range(size) {
+    var result = Array(size);
+    while (size--) {
+        result[size] = size;
+    }
+    return result;
+}
diff --git a/lib/mapValuesLimit.js b/lib/mapValuesLimit.js
index c6e020d..47e6072 100644
--- a/lib/mapValuesLimit.js
+++ b/lib/mapValuesLimit.js
@@ -1,6 +1,6 @@
 import eachOfLimit from './eachOfLimit';
 
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import once from './internal/once';
 import wrapAsync from './internal/wrapAsync';
 
diff --git a/lib/memoize.js b/lib/memoize.js
index 27c08bc..07d0837 100644
--- a/lib/memoize.js
+++ b/lib/memoize.js
@@ -1,6 +1,5 @@
-import identity from 'lodash/identity';
+import identity from './internal/identity';
 import slice from './internal/slice';
-
 import setImmediate from './internal/setImmediate';
 import initialParams from './internal/initialParams';
 import wrapAsync from './internal/wrapAsync';
diff --git a/lib/priorityQueue.js b/lib/priorityQueue.js
index aff7293..b7f7507 100644
--- a/lib/priorityQueue.js
+++ b/lib/priorityQueue.js
@@ -1,5 +1,4 @@
-import isArray from 'lodash/isArray';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 
 import setImmediate from './setImmediate';
 
@@ -39,7 +38,7 @@ export default function(worker, concurrency) {
             throw new Error('task callback must be a function');
         }
         q.started = true;
-        if (!isArray(data)) {
+        if (!Array.isArray(data)) {
             data = [data];
         }
         if (data.length === 0) {
diff --git a/lib/race.js b/lib/race.js
index 9b4d6c3..0593a72 100644
--- a/lib/race.js
+++ b/lib/race.js
@@ -1,5 +1,4 @@
-import isArray from 'lodash/isArray';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import once from './internal/once';
 import wrapAsync from './internal/wrapAsync';
 
@@ -41,7 +40,7 @@ import wrapAsync from './internal/wrapAsync';
  */
 export default function race(tasks, callback) {
     callback = once(callback || noop);
-    if (!isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));
+    if (!Array.isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));
     if (!tasks.length) return callback();
     for (var i = 0, l = tasks.length; i < l; i++) {
         wrapAsync(tasks[i])(callback);
diff --git a/lib/reduce.js b/lib/reduce.js
index 0d58c41..de42c5e 100644
--- a/lib/reduce.js
+++ b/lib/reduce.js
@@ -1,5 +1,5 @@
 import eachOfSeries from './eachOfSeries';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import once from './internal/once';
 import wrapAsync from './internal/wrapAsync';
 
diff --git a/lib/reflectAll.js b/lib/reflectAll.js
index 0774b94..3f078dc 100644
--- a/lib/reflectAll.js
+++ b/lib/reflectAll.js
@@ -1,7 +1,5 @@
 import reflect from './reflect';
-import isArray from 'lodash/isArray';
-import _arrayMap from 'lodash/_arrayMap';
-import forOwn from 'lodash/_baseForOwn';
+import forOwn from './internal/forOwn';
 
 /**
  * A helper function that wraps an array or an object of functions with `reflect`.
@@ -72,8 +70,8 @@ import forOwn from 'lodash/_baseForOwn';
  */
 export default function reflectAll(tasks) {
     var results;
-    if (isArray(tasks)) {
-        results = _arrayMap(tasks, reflect);
+    if (Array.isArray(tasks)) {
+        results = tasks.map(reflect);
     } else {
         results = {};
         forOwn(tasks, function(task, key) {
diff --git a/lib/retry.js b/lib/retry.js
index 391a4fa..390fd55 100644
--- a/lib/retry.js
+++ b/lib/retry.js
@@ -1,7 +1,12 @@
-import noop from 'lodash/noop';
-import constant from 'lodash/constant';
+import noop from './internal/noop';
 import wrapAsync from './internal/wrapAsync';
 
+function constant(value) {
+    return function () {
+        return value;
+    }
+}
+
 /**
  * Attempts to get a successful response from `task` no more than `times` times
  * before returning an error. If the task is successful, the `callback` will be
diff --git a/lib/seq.js b/lib/seq.js
index 8d31e49..5672195 100644
--- a/lib/seq.js
+++ b/lib/seq.js
@@ -1,8 +1,7 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import slice from './internal/slice';
 import reduce from './reduce';
 import wrapAsync from './internal/wrapAsync';
-import arrayMap from 'lodash/_arrayMap';
 
 /**
  * Version of the compose function that is more natural to read. Each function
@@ -43,7 +42,7 @@ import arrayMap from 'lodash/_arrayMap';
  * });
  */
 export default function seq(/*...functions*/) {
-    var _functions = arrayMap(arguments, wrapAsync);
+    var _functions = Array.prototype.map.call(arguments, wrapAsync);
     return function(/*...args*/) {
         var args = slice(arguments);
         var that = this;
diff --git a/lib/some.js b/lib/some.js
index ce91ce8..d574d02 100644
--- a/lib/some.js
+++ b/lib/some.js
@@ -1,6 +1,6 @@
 import createTester from './internal/createTester';
 import doParallel from './internal/doParallel';
-import identity from 'lodash/identity';
+import identity from './internal/identity';
 
 /**
  * Returns `true` if at least one element in the `coll` satisfies an async test.
diff --git a/lib/someLimit.js b/lib/someLimit.js
index 161c3cf..f234828 100644
--- a/lib/someLimit.js
+++ b/lib/someLimit.js
@@ -1,6 +1,6 @@
 import createTester from './internal/createTester';
 import doParallelLimit from './internal/doParallelLimit';
-import identity from 'lodash/identity';
+import identity from './internal/identity';
 
 /**
  * The same as [`some`]{@link module:Collections.some} but runs a maximum of `limit` async operations at a time.
diff --git a/lib/sortBy.js b/lib/sortBy.js
index 399debd..85028b2 100644
--- a/lib/sortBy.js
+++ b/lib/sortBy.js
@@ -1,8 +1,6 @@
-import arrayMap from 'lodash/_arrayMap';
-import property from 'lodash/_baseProperty';
-
 import map from './map';
 import wrapAsync from './internal/wrapAsync';
+import property from './internal/property';
 
 /**
  * Sorts a list by the results of running each `coll` value through an async
@@ -60,7 +58,7 @@ export default function sortBy (coll, iteratee, callback) {
         });
     }, function (err, results) {
         if (err) return callback(err);
-        callback(null, arrayMap(results.sort(comparator), property('value')));
+        callback(null, results.sort(comparator).map(property('value')));
     });
 
     function comparator(left, right) {
diff --git a/lib/timesLimit.js b/lib/timesLimit.js
index 22be265..bb4a1fe 100644
--- a/lib/timesLimit.js
+++ b/lib/timesLimit.js
@@ -1,5 +1,5 @@
 import mapLimit from './mapLimit';
-import range from 'lodash/_baseRange';
+import range from './internal/range';
 import wrapAsync from './internal/wrapAsync';
 
 /**
@@ -20,5 +20,5 @@ import wrapAsync from './internal/wrapAsync';
  */
 export default function timeLimit(count, limit, iteratee, callback) {
     var _iteratee = wrapAsync(iteratee);
-    mapLimit(range(0, count, 1), limit, _iteratee, callback);
+    mapLimit(range(count), limit, _iteratee, callback);
 }
diff --git a/lib/transform.js b/lib/transform.js
index ef254a1..501636c 100644
--- a/lib/transform.js
+++ b/lib/transform.js
@@ -1,7 +1,5 @@
-import isArray from 'lodash/isArray';
-import noop from 'lodash/noop';
-
 import eachOf from './eachOf';
+import noop from './internal/noop';
 import once from './internal/once';
 import wrapAsync from './internal/wrapAsync';
 
@@ -51,7 +49,7 @@ export default function transform (coll, accumulator, iteratee, callback) {
     if (arguments.length <= 3) {
         callback = iteratee;
         iteratee = accumulator;
-        accumulator = isArray(coll) ? [] : {};
+        accumulator = Array.isArray(coll) ? [] : {};
     }
     callback = once(callback || noop);
     var _iteratee = wrapAsync(iteratee);
diff --git a/lib/tryEach.js b/lib/tryEach.js
index df9b68f..87fba12 100644
--- a/lib/tryEach.js
+++ b/lib/tryEach.js
@@ -1,5 +1,5 @@
-import noop from 'lodash/noop';
 import eachSeries from './eachSeries';
+import noop from './internal/noop';
 import wrapAsync from './internal/wrapAsync';
 import slice from './internal/slice';
 
diff --git a/lib/waterfall.js b/lib/waterfall.js
index 092f3ac..3e71d2c 100644
--- a/lib/waterfall.js
+++ b/lib/waterfall.js
@@ -1,5 +1,4 @@
-import isArray from 'lodash/isArray';
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import once from './internal/once';
 import slice from './internal/slice';
 
@@ -65,7 +64,7 @@ import wrapAsync from './internal/wrapAsync';
  */
 export default  function(tasks, callback) {
     callback = once(callback || noop);
-    if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));
+    if (!Array.isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));
     if (!tasks.length) return callback();
     var taskIndex = 0;
 
diff --git a/lib/whilst.js b/lib/whilst.js
index 6c2869e..da748fa 100644
--- a/lib/whilst.js
+++ b/lib/whilst.js
@@ -1,4 +1,4 @@
-import noop from 'lodash/noop';
+import noop from './internal/noop';
 import slice from './internal/slice';
 
 import onlyOnce from './internal/onlyOnce';
diff --git a/package.json b/package.json
index 547adc6..b6cfdde 100644
--- a/package.json
+++ b/package.json
@@ -18,10 +18,7 @@
     "module",
     "utility"
   ],
-  "dependencies": {
-    "lodash": "^4.17.10",
-    "lodash-es": "^4.17.10"
-  },
+  "dependencies": {},
   "devDependencies": {
     "babel-cli": "^6.24.0",
     "babel-core": "^6.26.3",