lodash.isempty - npm Package Compare versions

Comparing version 4.1.3 to 4.2.0

index.js

 /**
- * lodash 4.1.3 (Custom Build) <https://lodash.com/>
+ * lodash 4.2.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
+var keys = require('lodash.keys'),
+    root = require('lodash._root');
 
@@ -17,7 +19,63 @@ /** Used as references for various `Number` constants. */
     genTag = '[object GeneratorFunction]',
-    stringTag = '[object String]';
+    mapTag = '[object Map]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    weakMapTag = '[object WeakMap]';
 
+var dataViewTag = '[object DataView]';
+
+/** Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to determine if values are of the language type `Object`. */
+var objectTypes = {
+  'function': true,
+  'object': true
+};
+
+/** Detect free variable `exports`. */
+var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
+  ? exports
+  : undefined;
+
+/** Detect free variable `module`. */
+var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
+  ? module
+  : undefined;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = (freeModule && freeModule.exports === freeExports)
+  ? freeExports
+  : undefined;
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
 /** Used to check objects for own properties. */
@@ -32,5 +90,29 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
 /** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+var Buffer = moduleExports ? root.Buffer : undefined,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap');
+
+/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
+var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = DataView ? (DataView + '') : '',
+    mapCtorString = Map ? funcToString.call(Map) : '',
+    promiseCtorString = Promise ? funcToString.call(Promise) : '',
+    setCtorString = Set ? funcToString.call(Set) : '',
+    weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
+
 /**
@@ -52,4 +134,5 @@ * The base implementation of `_.property` without support for deep paths.
  *
- * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
- * that affects Safari on at least iOS 8.1-8.3 ARM64.
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
  *
@@ -63,2 +146,51 @@ * @private
 /**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = object[key];
+  return isNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function getTag(value) {
+  return objectToString.call(value);
+}
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : null,
+        ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
  * Checks if `value` is likely an `arguments` object.
@@ -68,5 +200,7 @@ *
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
  * @example
@@ -91,6 +225,8 @@ *
  * @memberOf _
+ * @since 0.1.0
  * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
  * @example
@@ -119,2 +255,3 @@ *
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
@@ -147,5 +284,7 @@ * @param {*} value The value to check.
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array-like object, else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
  * @example
@@ -170,10 +309,37 @@ *
 /**
- * Checks if `value` is an empty collection or object. A value is considered
- * empty if it's an `arguments` object, array, string, or jQuery-like collection
- * with a length of `0` or has no own enumerable properties.
+ * Checks if `value` is a buffer.
  *
  * @static
  * @memberOf _
+ * @since 4.3.0
  * @category Lang
  * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = !Buffer ? constant(false) : function(value) {
+  return value instanceof Buffer;
+};
+
+/**
+ * Checks if `value` is an empty object, collection, map, or set.
+ *
+ * Objects are considered empty if they have no own enumerable string keyed
+ * properties.
+ *
+ * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+ * jQuery-like collections are considered empty if they have a `length` of `0`.
+ * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is empty, else `false`.
@@ -199,6 +365,12 @@ * @example
   if (isArrayLike(value) &&
-      (isArray(value) || isString(value) ||
-        isFunction(value.splice) || isArguments(value))) {
+      (isArray(value) || isString(value) || isFunction(value.splice) ||
+        isArguments(value) || isBuffer(value))) {
     return !value.length;
   }
+  if (isObjectLike(value)) {
+    var tag = getTag(value);
+    if (tag == mapTag || tag == setTag) {
+      return !value.size;
+    }
+  }
   for (var key in value) {
@@ -209,3 +381,3 @@ if (hasOwnProperty.call(value, key)) {
   }
-  return true;
+  return !(nonEnumShadows && keys(value).length);
 }
@@ -218,5 +390,7 @@
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
  * @example
@@ -241,9 +415,12 @@ *
  *
- * **Note:** This function is loosely based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
  * @example
@@ -274,2 +451,3 @@ *
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
@@ -303,2 +481,3 @@ * @param {*} value The value to check.
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
@@ -326,9 +505,40 @@ * @param {*} value The value to check.
 /**
+ * Checks if `value` is a native function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ * @example
+ *
+ * _.isNative(Array.prototype.push);
+ * // => true
+ *
+ * _.isNative(_);
+ * // => false
+ */
+function isNative(value) {
+  if (value == null) {
+    return false;
+  }
+  if (isFunction(value)) {
+    return reIsNative.test(funcToString.call(value));
+  }
+  return isObjectLike(value) &&
+    (isHostObject(value) ? reIsNative : reIsHostCtor).test(value);
+}
+
+/**
  * Checks if `value` is classified as a `String` primitive or object.
  *
  * @static
+ * @since 0.1.0
  * @memberOf _
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
  * @example
@@ -347,2 +557,25 @@ *
 
+/**
+ * Creates a function that returns `value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {*} value The value to return from the new function.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var getter = _.constant(object);
+ *
+ * getter() === object;
+ * // => true
+ */
+function constant(value) {
+  return function() {
+    return value;
+  };
+}
+
 module.exports = isEmpty;

package.json

 {
   "name": "lodash.isempty",
-  "version": "4.1.3",
+  "version": "4.2.0",
   "description": "The lodash method `_.isEmpty` exported as a module.",
@@ -16,3 +16,7 @@ "homepage": "https://lodash.com/",
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
+  "dependencies": {
+    "lodash._root": "~3.0.0",
+    "lodash.keys": "^4.0.0"
+  }
 }

README.md

@@ -1,2 +0,2 @@
-# lodash.isempty v4.1.3
+# lodash.isempty v4.2.0
 
@@ -18,2 +18,2 @@ The [lodash](https://lodash.com/) method `_.isEmpty` exported as a [Node.js](https://nodejs.org/) module.
 
-See the [documentation](https://lodash.com/docs#isEmpty) or [package source](https://github.com/lodash/lodash/blob/4.1.3-npm-packages/lodash.isempty) for more details.
+See the [documentation](https://lodash.com/docs#isEmpty) or [package source](https://github.com/lodash/lodash/blob/4.2.0-npm-packages/lodash.isempty) for more details.

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Improved metrics

Total package byte prevSize

17805

increased by66.48%

Lines of code

525

increased by68.27%

Worsened metrics

Dependency count

2

increased byInfinity%

Number of low license alerts

1

increased byInfinity%

Dependency changes

• + Addedlodash._root@~3.0.0

• + Addedlodash.keys@^4.0.0

• + Addedlodash._root@3.0.1(transitive)

• + Addedlodash.keys@4.2.0(transitive)