Last active
March 11, 2019 11:09
-
-
Save piecioshka/6008030 to your computer and use it in GitHub Desktop.
[empty objects] #JavaScript
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/** | |
* TEST DATA | |
*/ | |
var testData = [{}, {a:1}, new RegExp(), [], Object.create(null), [undefined]]; | |
/** | |
* Check if param is Object? | |
* @param {*} o Checks value. | |
* @return {boolean} | |
*/ | |
var isObject = function(o) { | |
return o === Object(o); | |
}; | |
/** | |
* Check if param is Array? | |
* @param {*} o Checks value. | |
* @return {boolean} | |
*/ | |
var isArray = Array.isArray || function(o) { | |
return ({}).toString.call(o) == '[object Array]'; | |
}; | |
/** | |
* Check if param is EmptyObject? | |
* @param {*} o Checks value. | |
* @return {boolean} | |
*/ | |
var isEmptyObject = function (o) { | |
if (!isObject(o) || isArray(o)) return false; | |
return Object.keys ? !Object.keys(o).length : (function (o) { | |
for (var k in o) if (o.hasOwnProperty(k)) return false; | |
return true; | |
})(o) | |
}; | |
/** | |
* RUN TESTS | |
*/ | |
testData.forEach(function (item) { | |
console.log(isEmptyObject(item)); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment