fcc_everything_be_true.js

function truthCheck(collection, pre) {
  var count = 0;
  // loop through each object in the collection array
  collection.forEach(function(element, index){
    // loop through each key in the object
    for (var key in element) {
      // iterate through the object's properties
      if (element.hasOwnProperty(key))
        if (!element[pre])
          return false; // return false if any of the object's properties are falsy
        // check if key is equal to the second argument of the function
        if (key === pre) {
          count += 1;
      }
    }
  });
  
  // if the length of the collection is not equal to the count return false
  if (collection.length !== count) {
    return false;
  }
  return true;
}