perfomance fixes, eslint fixes (#4482)

.internal/MapCache.js

@@ -12,7 +12,7 @@ import Hash from './Hash.js'
 function getMapData({ __data__ }, key) {
   const data = __data__
   return isKeyable(key)
-    ? data[typeof key == 'string' ? 'string' : 'hash']
+    ? data[typeof key === 'string' ? 'string' : 'hash']
     : data.map
 }
 
@@ -25,7 +25,7 @@ function getMapData({ __data__ }, key) {
  */
 function isKeyable(value) {
   const type = typeof value
-  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+  return (type === 'string' || type === 'number' || type === 'symbol' || type === 'boolean')
     ? (value !== '__proto__')
     : (value === null)
 }

.internal/arrayLikeKeys.js

@@ -30,7 +30,7 @@ function arrayLikeKeys(value, inherited) {
     if ((inherited || hasOwnProperty.call(value, key)) &&
         !(skipIndexes && (
         // Safari 9 has enumerable `arguments.length` in strict mode.
-          (key == 'length' ||
+          (key === 'length' ||
            // Skip index properties.
            isIndex(key, length))
         ))) {

.internal/assignValue.js

@@ -16,7 +16,7 @@ function assignValue(object, key, value) {
   const objValue = object[key]
 
   if (!(hasOwnProperty.call(object, key) && eq(objValue, value))) {
-    if (value !== 0 || (1 / value) == (1 / objValue)) {
+    if (value !== 0 || (1 / value) === (1 / objValue)) {
       baseAssignValue(object, key, value)
     }
   } else if (value === undefined && !(key in object)) {

.internal/baseClone.js

@@ -131,7 +131,7 @@ function initCloneArray(array) {
   const result = new array.constructor(length)
 
   // Add properties assigned by `RegExp#exec`.
-  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+  if (length && typeof array[0] === 'string' && hasOwnProperty.call(array, 'index')) {
     result.index = array.index
     result.input = array.input
   }
@@ -177,7 +177,7 @@ function baseClone(value, bitmask, customizer, key, object, stack) {
       return copyArray(value, result)
     }
   } else {
-    const isFunc = typeof value == 'function'
+    const isFunc = typeof value === 'function'
 
     if (isBuffer(value)) {
       return cloneBuffer(value, isDeep)

.internal/baseMatches.js

@@ -11,7 +11,7 @@ import matchesStrictComparable from './matchesStrictComparable.js'
  */
 function baseMatches(source) {
   const matchData = getMatchData(source)
-  if (matchData.length == 1 && matchData[0][2]) {
+  if (matchData.length === 1 && matchData[0][2]) {
     return matchesStrictComparable(matchData[0][0], matchData[0][1])
   }
   return (object) => object === source || baseIsMatch(object, source, matchData)

.internal/baseMergeDeep.js

@@ -71,7 +71,7 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       if (isArguments(objValue)) {
         newValue = toPlainObject(objValue)
       }
-      else if (typeof objValue == 'function' || !isObject(objValue)) {
+      else if (typeof objValue === 'function' || !isObject(objValue)) {
         newValue = initCloneObject(srcValue)
       }
     }

.internal/basePullAt.js

@@ -17,7 +17,7 @@ function basePullAt(array, indexes) {
   while (length--) {
     let previous
     const index = indexes[length]
-    if (length == lastIndex || index !== previous) {
+    if (length === lastIndex || index !== previous) {
       previous = index
       if (isIndex(index)) {
         array.splice(index, 1)

.internal/baseSortedIndex.js

@@ -21,7 +21,7 @@ function baseSortedIndex(array, value, retHighest) {
   let low = 0
   let high = array == null ? low : array.length
 
-  if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+  if (typeof value === 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
     while (low < high) {
       const mid = (low + high) >>> 1
       const computed = array[mid]

.internal/baseToNumber.js

@@ -12,7 +12,7 @@ const NAN = 0 / 0
  * @returns {number} Returns the number.
  */
 function baseToNumber(value) {
-  if (typeof value == 'number') {
+  if (typeof value === 'number') {
     return value
   }
   if (isSymbol(value)) {

.internal/baseToString.js

@@ -16,7 +16,7 @@ const symbolToString = Symbol.prototype.toString
  */
 function baseToString(value) {
   // Exit early for strings to avoid a performance hit in some environments.
-  if (typeof value == 'string') {
+  if (typeof value === 'string') {
     return value
   }
   if (Array.isArray(value)) {

.internal/cloneBuffer.js

@@ -1,10 +1,10 @@
 import root from './root.js'
 
 /** Detect free variable `exports`. */
-const freeExports = typeof exports == 'object' && exports !== null && !exports.nodeType && exports
+const freeExports = typeof exports === 'object' && exports !== null && !exports.nodeType && exports
 
 /** Detect free variable `module`. */
-const freeModule = freeExports && typeof module == 'object' && module !== null && !module.nodeType && module
+const freeModule = freeExports && typeof module === 'object' && module !== null && !module.nodeType && module
 
 /** Detect the popular CommonJS extension `module.exports`. */
 const moduleExports = freeModule && freeModule.exports === freeExports

.internal/compareAscending.js

@@ -20,7 +20,7 @@ function compareAscending(value, other) {
     const othIsReflexive = other === other
     const othIsSymbol = isSymbol(other)
 
-    const val = typeof value == 'string'
+    const val = typeof value === 'string'
       ? value.localeCompare(other)
       : -other
 

.internal/createAssigner.js

@@ -14,7 +14,7 @@ function createAssigner(assigner) {
     let customizer = length > 1 ? sources[length - 1] : undefined
     const guard = length > 2 ? sources[2] : undefined
 
-    customizer = (assigner.length > 3 && typeof customizer == 'function')
+    customizer = (assigner.length > 3 && typeof customizer === 'function')
       ? (length--, customizer)
       : undefined
 

.internal/equalObjects.js

@@ -75,8 +75,8 @@ function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
     // Non `Object` object instances with different constructors are not equal.
     if (objCtor != othCtor &&
         ('constructor' in object && 'constructor' in other) &&
-        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
-          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+        !(typeof objCtor === 'function' && objCtor instanceof objCtor &&
+          typeof othCtor === 'function' && othCtor instanceof othCtor)) {
       result = false
     }
   }

.internal/freeGlobal.js

@@ -1,4 +1,4 @@
 /** Detect free variable `global` from Node.js. */
-const freeGlobal = typeof global == 'object' && global !== null && global.Object === Object && global
+const freeGlobal = typeof global === 'object' && global !== null && global.Object === Object && global
 
 export default freeGlobal

.internal/initCloneObject.js

@@ -8,7 +8,7 @@ import isPrototype from './isPrototype.js'
  * @returns {Object} Returns the initialized clone.
  */
 function initCloneObject(object) {
-  return (typeof object.constructor == 'function' && !isPrototype(object))
+  return (typeof object.constructor === 'function' && !isPrototype(object))
     ? Object.create(Object.getPrototypeOf(object))
     : {}
 }

.internal/isIndex.js

@@ -17,8 +17,8 @@ function isIndex(value, length) {
   length = length == null ? MAX_SAFE_INTEGER : length
 
   return !!length &&
-    (type == 'number' ||
-      (type != 'symbol' && reIsUint.test(value))) &&
+    (type === 'number' ||
+      (type !== 'symbol' && reIsUint.test(value))) &&
         (value > -1 && value % 1 == 0 && value < length)
 }
 

.internal/isIterateeCall.js

@@ -19,9 +19,9 @@ function isIterateeCall(value, index, object) {
     return false
   }
   const type = typeof index
-  if (type == 'number'
+  if (type === 'number'
     ? (isArrayLike(object) && isIndex(index, object.length))
-    : (type == 'string' && index in object)
+    : (type === 'string' && index in object)
   ) {
     return eq(object[index], value)
   }

.internal/isKey.js

@@ -17,7 +17,7 @@ function isKey(value, object) {
     return false
   }
   const type = typeof value
-  if (type == 'number' || type == 'boolean' || value == null || isSymbol(value)) {
+  if (type === 'number' || type === 'boolean' || value == null || isSymbol(value)) {
     return true
   }
   return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||

.internal/isPrototype.js

@@ -10,7 +10,7 @@ const objectProto = Object.prototype
  */
 function isPrototype(value) {
   const Ctor = value && value.constructor
-  const proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto
+  const proto = (typeof Ctor === 'function' && Ctor.prototype) || objectProto
 
   return value === proto
 }

.internal/nodeTypes.js

@@ -1,10 +1,10 @@
 import freeGlobal from './freeGlobal.js'
 
 /** Detect free variable `exports`. */
-const freeExports = typeof exports == 'object' && exports !== null && !exports.nodeType && exports
+const freeExports = typeof exports === 'object' && exports !== null && !exports.nodeType && exports
 
 /** Detect free variable `module`. */
-const freeModule = freeExports && typeof module == 'object' && module !== null && !module.nodeType && module
+const freeModule = freeExports && typeof module === 'object' && module !== null && !module.nodeType && module
 
 /** Detect the popular CommonJS extension `module.exports`. */
 const moduleExports = freeModule && freeModule.exports === freeExports

.internal/root.js

@@ -2,10 +2,10 @@
 import freeGlobal from './freeGlobal.js'
 
 /** Detect free variable `globalThis` */
-const freeGlobalThis = typeof globalThis == 'object' && globalThis !== null && globalThis.Object == Object && globalThis
+const freeGlobalThis = typeof globalThis === 'object' && globalThis !== null && globalThis.Object == Object && globalThis
 
 /** Detect free variable `self`. */
-const freeSelf = typeof self == 'object' && self !== null && self.Object === Object && self
+const freeSelf = typeof self === 'object' && self !== null && self.Object === Object && self
 
 /** Used as a reference to the global object. */
 const root = freeGlobalThis || freeGlobal || freeSelf || Function('return this')()

.internal/toKey.js

@@ -11,7 +11,7 @@ const INFINITY = 1 / 0
  * @returns {string|symbol} Returns the key.
  */
 function toKey(value) {
-  if (typeof value == 'string' || isSymbol(value)) {
+  if (typeof value === 'string' || isSymbol(value)) {
     return value
   }
   const result = `${value}`

after.js

@@ -16,7 +16,7 @@
  * // => Logs 'done saving!' after the two async saves have completed.
  */
 function after(n, func) {
-  if (typeof func != 'function') {
+  if (typeof func !== 'function') {
     throw new TypeError('Expected a function')
   }
   n = n || 0

before.js

@@ -15,7 +15,7 @@
  */
 function before(n, func) {
   let result
-  if (typeof func != 'function') {
+  if (typeof func !== 'function') {
     throw new TypeError('Expected a function')
   }
   return function(...args) {

cloneDeepWith.js

@@ -33,7 +33,7 @@ const CLONE_SYMBOLS_FLAG = 4
  * // => 20
  */
 function cloneDeepWith(value, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer)
 }
 

cloneWith.js

@@ -33,7 +33,7 @@ const CLONE_SYMBOLS_FLAG = 4
  * // => 0
  */
 function cloneWith(value, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   return baseClone(value, CLONE_SYMBOLS_FLAG, customizer)
 }
 

cond.js

@@ -31,7 +31,7 @@ function cond(pairs) {
   const length = pairs == null ? 0 : pairs.length
 
   pairs = !length ? [] : map(pairs, (pair) => {
-    if (typeof pair[1] != 'function') {
+    if (typeof pair[1] !== 'function') {
       throw new TypeError('Expected a function')
     }
     return [pair[0], pair[1]]

defer.js

@@ -13,7 +13,7 @@
  * // => Logs 'deferred' after one millisecond.
  */
 function defer(func, ...args) {
-  if (typeof func != 'function') {
+  if (typeof func !== 'function') {
     throw new TypeError('Expected a function')
   }
   return setTimeout(func, 1, ...args)

delay.js

@@ -14,7 +14,7 @@
  * // => Logs 'later' after one second.
  */
 function delay(func, wait, ...args) {
-  if (typeof func != 'function') {
+  if (typeof func !== 'function') {
     throw new TypeError('Expected a function')
   }
   return setTimeout(func, +wait || 0, ...args)

flip.js

@@ -14,7 +14,7 @@
  * // => ['d', 'c', 'b', 'a']
  */
 function flip(func) {
-  if (typeof func != 'function') {
+  if (typeof func !== 'function') {
     throw new TypeError('Expected a function')
   }
   return function(...args) {

flow.js

@@ -11,7 +11,7 @@
  * @example
  *
  * import add from 'lodash/add'
- * 
+ *
  * function square(n) {
  *   return n * n
  * }
@@ -24,7 +24,7 @@ function flow(...funcs) {
   const length = funcs ? funcs.length : 0
   let index = length
   while (index--) {
-    if (typeof funcs[index] != 'function') {
+    if (typeof funcs[index] !== 'function') {
       throw new TypeError('Expected a function')
     }
   }

flowRight.js

@@ -12,7 +12,7 @@ import flow from './flow.js'
  * @example
  *
  * import add from 'lodash/add'
- * 
+ *
  * function square(n) {
  *   return n * n
  * }

functions.js

@@ -23,7 +23,7 @@ function functions(object) {
   if (object == null) {
     return []
   }
-  return Object.keys(object).filter((key) => typeof object[key] == 'function')
+  return Object.keys(object).filter((key) => typeof object[key] === 'function')
 }
 
 export default functions

gt.js

@@ -20,7 +20,7 @@
  * // => false
  */
 function gt(value, other) {
-  if (!(typeof value == 'string' && typeof other == 'string')) {
+  if (!(typeof value === 'string' && typeof other === 'string')) {
     value = +value
     other = +other
   }

gte.js

@@ -20,7 +20,7 @@
  * // => false
  */
 function gte(value, other) {
-  if (!(typeof value == 'string' && typeof other == 'string')) {
+  if (!(typeof value === 'string' && typeof other === 'string')) {
     value = +value
     other = +other
   }

intersectionWith.js

@@ -26,7 +26,7 @@ function intersectionWith(...arrays) {
   let comparator = last(arrays)
   const mapped = map(arrays, castArrayLikeObject)
 
-  comparator = typeof comparator == 'function' ? comparator : undefined
+  comparator = typeof comparator === 'function' ? comparator : undefined
   if (comparator) {
     mapped.pop()
   }

invert.js

@@ -20,7 +20,7 @@ function invert(object) {
   const result = {}
   Object.keys(object).forEach((key) => {
     let value = object[key]
-    if (value != null && typeof value.toString != 'function') {
+    if (value != null && typeof value.toString !== 'function') {
       value = toString.call(value)
     }
     result[value] = key

invokeMap.js

@@ -25,7 +25,7 @@ import isArrayLike from './isArrayLike.js'
  */
 function invokeMap(collection, path, args) {
   let index = -1
-  const isFunc = typeof path == 'function'
+  const isFunc = typeof path === 'function'
   const result = isArrayLike(collection) ? new Array(collection.length) : []
 
   baseEach(collection, (value) => {

isArrayLike.js

@@ -24,7 +24,7 @@ import isLength from './isLength.js'
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && typeof value != 'function' && isLength(value.length)
+  return value != null && typeof value !== 'function' && isLength(value.length)
 }
 
 export default isArrayLike

isBuffer.js

@@ -1,10 +1,10 @@
 import root from './.internal/root.js'
 
 /** Detect free variable `exports`. */
-const freeExports = typeof exports == 'object' && exports !== null && !exports.nodeType && exports
+const freeExports = typeof exports === 'object' && exports !== null && !exports.nodeType && exports
 
 /** Detect free variable `module`. */
-const freeModule = freeExports && typeof module == 'object' && module !== null && !module.nodeType && module
+const freeModule = freeExports && typeof module === 'object' && module !== null && !module.nodeType && module
 
 /** Detect the popular CommonJS extension `module.exports`. */
 const moduleExports = freeModule && freeModule.exports === freeExports

isEmpty.js

@@ -47,7 +47,7 @@ function isEmpty(value) {
     return true
   }
   if (isArrayLike(value) &&
-      (Array.isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
+      (Array.isArray(value) || typeof value === 'string' || typeof value.splice === 'function' ||
         isBuffer(value) || isTypedArray(value) || isArguments(value))) {
     return !value.length
   }

isEqualWith.js

@@ -31,7 +31,7 @@ import baseIsEqual from './.internal/baseIsEqual.js'
  * // => true
  */
 function isEqualWith(value, other, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   const result = customizer ? customizer(value, other) : undefined
   return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result
 }

isError.js

@@ -24,7 +24,7 @@ function isError(value) {
   }
   const tag = getTag(value)
   return tag == '[object Error]' || tag == '[object DOMException]' ||
-    (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value))
+    (typeof value.message === 'string' && typeof value.name === 'string' && !isPlainObject(value))
 }
 
 export default isError

isLength.js

@@ -26,7 +26,7 @@ const MAX_SAFE_INTEGER = 9007199254740991
  * // => false
  */
 function isLength(value) {
-  return typeof value == 'number' &&
+  return typeof value === 'number' &&
     value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER
 }
 

isMatchWith.js

@@ -32,7 +32,7 @@ import getMatchData from './.internal/getMatchData.js'
  * // => true
  */
 function isMatchWith(object, source, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   return baseIsMatch(object, source, getMatchData(source), customizer)
 }
 

isNumber.js

@@ -27,7 +27,7 @@ import isObjectLike from './isObjectLike.js'
  * // => false
  */
 function isNumber(value) {
-  return typeof value == 'number' ||
+  return typeof value === 'number' ||
     (isObjectLike(value) && getTag(value) == '[object Number]')
 }
 

isObject.js

@@ -23,7 +23,7 @@
  */
 function isObject(value) {
   const type = typeof value
-  return value != null && (type == 'object' || type == 'function')
+  return value != null && (type === 'object' || type === 'function')
 }
 
 export default isObject

isObjectLike.js

@@ -21,7 +21,7 @@
  * // => false
  */
 function isObjectLike(value) {
-  return typeof value == 'object' && value !== null
+  return typeof value === 'object' && value !== null
 }
 
 export default isObjectLike

isString.js

@@ -17,7 +17,7 @@ import getTag from './.internal/getTag.js'
  */
 function isString(value) {
   const type = typeof value
-  return type == 'string' || (type == 'object' && value != null && !Array.isArray(value) && getTag(value) == '[object String]')
+  return type === 'string' || (type === 'object' && value != null && !Array.isArray(value) && getTag(value) == '[object String]')
 }
 
 export default isString

isSymbol.js

@@ -17,7 +17,7 @@ import getTag from './.internal/getTag.js'
  */
 function isSymbol(value) {
   const type = typeof value
-  return type == 'symbol' || (type == 'object' && value != null && getTag(value) == '[object Symbol]')
+  return type == 'symbol' || (type === 'object' && value != null && getTag(value) == '[object Symbol]')
 }
 
 export default isSymbol

lt.js

@@ -20,7 +20,7 @@
  * // => false
  */
 function lt(value, other) {
-  if (!(typeof value == 'string' && typeof other == 'string')) {
+  if (!(typeof value === 'string' && typeof other === 'string')) {
     value = +value
     other = +other
   }

lte.js

@@ -20,7 +20,7 @@
  * // => false
  */
 function lte(value, other) {
-  if (!(typeof value == 'string' && typeof other == 'string')) {
+  if (!(typeof value === 'string' && typeof other === 'string')) {
     value = +value
     other = +other
   }

memoize.js

@@ -41,7 +41,7 @@
  * memoize.Cache = WeakMap
  */
 function memoize(func, resolver) {
-  if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
+  if (typeof func !== 'function' || (resolver != null && typeof resolver !== 'function')) {
     throw new TypeError('Expected a function')
   }
   const memoized = function(...args) {

negate.js

@@ -17,7 +17,7 @@
  * // => [1, 3, 5]
  */
 function negate(predicate) {
-  if (typeof predicate != 'function') {
+  if (typeof predicate !== 'function') {
     throw new TypeError('Expected a function')
   }
   return function(...args) {

random.js

@@ -35,11 +35,11 @@ const freeParseFloat = parseFloat
  */
 function random(lower, upper, floating) {
   if (floating === undefined) {
-    if (typeof upper == 'boolean') {
+    if (typeof upper === 'boolean') {
       floating = upper
       upper = undefined
     }
-    else if (typeof lower == 'boolean') {
+    else if (typeof lower === 'boolean') {
       floating = lower
       lower = undefined
     }

result.js

@@ -45,7 +45,7 @@ function result(object, path, defaultValue) {
       index = length
       value = defaultValue
     }
-    object = typeof value == 'function' ? value.call(object) : value
+    object = typeof value === 'function' ? value.call(object) : value
   }
   return object
 }

setWith.js

@@ -23,7 +23,7 @@ import baseSet from './.internal/baseSet.js'
  * // => { '0': { '1': 'a' } }
  */
 function setWith(object, path, value, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   return object == null ? object : baseSet(object, path, value, customizer)
 }
 

split.js

@@ -29,7 +29,7 @@ function split(string, separator, limit) {
     return []
   }
   if (string && (
-    typeof separator == 'string' ||
+    typeof separator === 'string' ||
         (separator != null && !isRegExp(separator))
   )) {
     if (!separator && hasUnicode(string)) {

test/basename.js

@@ -42,7 +42,7 @@ describe(basename, function() {
 
       var attempt = function() {
         var actual = _VERSION;
-        if ((new Date - start) < limit && typeof actual != 'string') {
+        if ((new Date - start) < limit && typeof actual !== 'string') {
           setTimeout(attempt, 16);
           return;
         }

test/bind.js

@@ -195,7 +195,7 @@ describe('bind', function() {
   it('should not error when calling bound class constructors with the `new` operator', function() {
     var createCtor = lodashStable.attempt(Function, '"use strict";return class A{}');
 
-    if (typeof createCtor == 'function') {
+    if (typeof createCtor === 'function') {
       var bound = bind(createCtor()),
           count = 8,
           expected = lodashStable.times(count, stubTrue);

test/isFunction.js

@@ -25,11 +25,11 @@ describe('isFunction', function() {
   });
 
   it('should return `true` for async functions', function() {
-    assert.strictEqual(isFunction(asyncFunc), typeof asyncFunc == 'function');
+    assert.strictEqual(isFunction(asyncFunc), typeof asyncFunc === 'function');
   });
 
   it('should return `true` for generator functions', function() {
-    assert.strictEqual(isFunction(genFunc), typeof genFunc == 'function');
+    assert.strictEqual(isFunction(genFunc), typeof genFunc === 'function');
   });
 
   it('should return `true` for the `Proxy` constructor', function() {

test/isNumber.test.js

@@ -12,7 +12,7 @@ describe('isNumber', function() {
 
   it('should return `false` for non-numbers', function() {
     var expected = lodashStable.map(falsey, function(value) {
-      return typeof value == 'number';
+      return typeof value === 'number';
     });
 
     var actual = lodashStable.map(falsey, function(value, index) {

test/keys-methods.js

@@ -139,7 +139,7 @@ describe('keys methods', function() {
 
     it('`_.' + methodName + '` should coerce primitives to objects (test in IE 9)', function() {
       var expected = lodashStable.map(primitives, function(value) {
-        return typeof value == 'string' ? ['0'] : [];
+        return typeof value === 'string' ? ['0'] : [];
       });
 
       var actual = lodashStable.map(primitives, func);

test/utils.js

@@ -24,7 +24,7 @@ var funcTag = '[object Function]',
     objectTag = '[object Object]';
 
 /** Used as a reference to the global object. */
-var root = (typeof global == 'object' && global) || this;
+var root = (typeof global === 'object' && global) || this;
 
 /** Used to store lodash to test for bad extensions/shims. */
 var lodashBizarro = root.lodashBizarro;
@@ -246,7 +246,7 @@ var isModularize = ui.isModularize;
 var isNpm = isModularize && /\bnpm\b/.test([ui.buildPath, ui.urlParams.build]);
 
 /** Detect if running in PhantomJS. */
-var isPhantom = phantom || (typeof callPhantom == 'function');
+var isPhantom = phantom || (typeof callPhantom === 'function');
 
 /** Detect if lodash is in strict mode. */
 var isStrict = ui.isStrict;
@@ -459,7 +459,7 @@ function toArgs(array) {
 // Add bizarro values.
 (function() {
   return; // fixme
-  if (document || (typeof require != 'function')) {
+  if (document || (typeof require !== 'function')) {
     return;
   }
   var nativeString = fnToString.call(toString),

toNumber.js

@@ -42,17 +42,17 @@ const freeParseInt = parseInt
  * // => 3.2
  */
 function toNumber(value) {
-  if (typeof value == 'number') {
+  if (typeof value === 'number') {
     return value
   }
   if (isSymbol(value)) {
     return NAN
   }
   if (isObject(value)) {
-    const other = typeof value.valueOf == 'function' ? value.valueOf() : value
+    const other = typeof value.valueOf === 'function' ? value.valueOf() : value
     value = isObject(other) ? `${other}` : other
   }
-  if (typeof value != 'string') {
+  if (typeof value !== 'string') {
     return value === 0 ? value : +value
   }
   value = value.replace(reTrim, '')

toString.js

@@ -27,7 +27,7 @@ function toString(value) {
     return ''
   }
   // Exit early for strings to avoid a performance hit in some environments.
-  if (typeof value == 'string') {
+  if (typeof value === 'string') {
     return value
   }
   if (Array.isArray(value)) {

transform.js

@@ -43,7 +43,7 @@ function transform(object, iteratee, accumulator) {
       accumulator = isArr ? new Ctor : []
     }
     else if (isObject(object)) {
-      accumulator = typeof Ctor == 'function'
+      accumulator = typeof Ctor === 'function'
         ? Object.create(Object.getPrototypeOf(object))
         : {}
     }

unionWith.js

@@ -25,7 +25,7 @@ import last from './last.js'
  */
 function unionWith(...arrays) {
   let comparator = last(arrays)
-  comparator = typeof comparator == 'function' ? comparator : undefined
+  comparator = typeof comparator === 'function' ? comparator : undefined
   return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator)
 }
 

uniqWith.js

@@ -20,7 +20,7 @@ import baseUniq from './.internal/baseUniq.js'
  * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
  */
 function uniqWith(array, comparator) {
-  comparator = typeof comparator == 'function' ? comparator : undefined
+  comparator = typeof comparator === 'function' ? comparator : undefined
   return (array != null && array.length)
     ? baseUniq(array, undefined, comparator)
     : []

updateWith.js

@@ -23,7 +23,7 @@ import baseUpdate from './.internal/baseUpdate.js'
  * // => { '0': { '1': 'a' } }
  */
 function updateWith(object, path, updater, customizer) {
-  customizer = typeof customizer == 'function' ? customizer : undefined
+  customizer = typeof customizer === 'function' ? customizer : undefined
   return object == null ? object : baseUpdate(object, path, updater, customizer)
 }
 

xorWith.js

@@ -24,7 +24,7 @@ import last from './last.js'
  */
 function xorWith(...arrays) {
   let comparator = last(arrays)
-  comparator = typeof comparator == 'function' ? comparator : undefined
+  comparator = typeof comparator === 'function' ? comparator : undefined
   return baseXor(arrays.filter(isArrayLikeObject), undefined, comparator)
 }
 

zipWith.js

@@ -20,7 +20,7 @@ import unzipWith from './unzipWith.js'
 function zipWith(...arrays) {
   const length = arrays.length
   let iteratee = length > 1 ? arrays[length - 1] : undefined
-  iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined
+  iteratee = typeof iteratee === 'function' ? (arrays.pop(), iteratee) : undefined
   return unzipWith(arrays, iteratee)
 }