---
title: Everything Be True
---
 Remember to use <a>**`Read-Search-Ask`**</a> if you get stuck. Try to pair program  and write your own code 
###  Problem Explanation:
The program needs to check if the second argument is a <a href='http://forum.freecodecamp.com/t/javascript-truthy-value/15975' target='_blank' rel='nofollow'>truthy</a> element, and it must check this for each object in the first argument.
#### Relevant Links
* <a href='http://forum.freecodecamp.com/t/javascript-truthy-value/15975' target='_blank' rel='nofollow'>JavaScript Truthy</a>
* <a href='http://forum.freecodecamp.com/t/javascript-arguments/14283.md' target='_blank' rel='nofollow'>JavaScript Arguments</a>
##  Hint: 1
Remember to iterate through the first argument to check each object.
> _try to solve the problem now_
##  Hint: 2
Only if all of them are truthy will we return true, so make sure all of them check.
> _try to solve the problem now_
##  Hint: 3
You could use loops or callback functions, there are multiple ways to solve this problem.
> _try to solve the problem now_
## Spoiler Alert!
**Solutions ahead!**
##  Basic Code Solution:
**Using for-in loop & hasOwnProperty**
function truthCheck(collection, pre) {
// Create a counter to check how many are true.
var counter = 0;
// Check for each object
for (var c in collection) {
// If it is has property and value is truthy
if (collection[c].hasOwnProperty(pre) && Boolean(collection[c][pre])) {
counter++;
}
}
// Outside the loop, check to see if we got true for all of them and return true or false
return counter == collection.length;
}
// test here
truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex");
 <a href='https://repl.it/CLnw/0' target='_blank' rel='nofollow'>Run Code</a>
### Code Explanation:
* First I create a counter to check how many cases are actually true.
* Then check for each object if the value is truthy
* Outside the loop, I check to see if the counter variable has the same value as the length of **collection**, if true then return **true**, otherwise, return **false**
#### Relevant Links
* <a href='http://forum.freecodecamp.com/t/javascript-loops/14681' target='_blank' rel='nofollow'>JS Loops</a>
* <a href='https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty' target='_blank' rel='nofollow'>Object.prototype.hasOwnProperty()</a>
##  Intermediate Code Solution:
**Using Array.every()**
function truthCheck(collection, pre) {
return collection.every(function (element) {
return element.hasOwnProperty(pre) && Boolean(element[pre]);
});
}
// test here
truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex");
 <a href='https://repl.it/CLny/0' target='_blank' rel='nofollow'>Run Code</a>
### Code Explanation:
* Uses the native "every" method to test whether all elements in the array pass the test.
* This link will help <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every' target='_blank' rel='nofollow'>Array.prototype.every()</a>
#### Relevant Links
* <a href='http://forum.freecodecamp.com/t/javascript-array-prototype-every/14287' target='_blank' rel='nofollow'>JS Array.prototype.every()</a>
* <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every' target='_blank' rel='nofollow'>MDN Array.prototype.every()</a>
##  Advanced Code Solution:
function truthCheck(collection, pre) {
// Is everyone being true?
return collection.every(obj => obj[pre]);
}
truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex");
 <a href='https://repl.it/E2u6/0' target='_blank' rel='nofollow'>Run Code</a>
### Code Explanation:
* For _every_ object in the `collection` array, check the truthiness of object's property passed in `pre` parameter
* `Array#every` method internally checks if the value returned from the callback is truthy.
* Return `true` if it passes for _every_ object. Otherwise, return `false`.
#### Relevant Links
* <a href='http://devdocs.io/javascript/global_objects/array/every' target='_blank' rel='nofollow'>`Array#every`</a>
##  NOTES FOR CONTRIBUTIONS:
*  **DO NOT** add solutions that are similar to any existing solutions. If you think it is **_similar but better_**, then try to merge (or replace) the existing similar solution.
* Add an explanation of your solution.
* Categorize the solution in one of the following categories — **Basic**, **Intermediate** and **Advanced**. 
* Please add your username only if you have added any **relevant main contents**. ( **_DO NOT_** _remove any existing usernames_)
> See  <a href='http://forum.freecodecamp.com/t/algorithm-article-template/14272' target='_blank' rel='nofollow'>**`Wiki Challenge Solution Template`**</a> for reference.