diff --git a/build.js b/build.js index 7bf2904b5..8a42d43cb 100755 --- a/build.js +++ b/build.js @@ -108,7 +108,7 @@ 'isEqual': ['isArguments', 'isFunction'], 'isFinite': [], 'isFunction': [], - 'isNaN': [], + 'isNaN': ['isNumber'], 'isNull': [], 'isNumber': [], 'isObject': [], diff --git a/lodash.js b/lodash.js index fa9a7a019..74e66aea5 100644 --- a/lodash.js +++ b/lodash.js @@ -1482,7 +1482,7 @@ function isNaN(value) { // `NaN` as a primitive is the only value that is not equal to itself // (perform the [[Class]] check first to avoid errors with some host objects in IE) - return toString.call(value) == numberClass && value != +value + return isNumber(value) && value != +value } /** @@ -1519,7 +1519,7 @@ * // => true */ function isNumber(value) { - return toString.call(value) == numberClass; + return typeof value == 'number' || toString.call(value) == numberClass; } /** @@ -1589,7 +1589,7 @@ * // => true */ function isString(value) { - return toString.call(value) == stringClass; + 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