Everything Be True

Everything Be True.

Overview

In JavaScript, a truthy value is a value that is considered true when evaluated in a Boolean context. All values are truthy unless they are defined as falsy (i.e., except for false , 0 , “” , null , undefined , and NaN ). JavaScript uses type coercion in Boolean contexts.

Instruction

Check if the predicate (second argument) is truthy on all elements of a collection (first argument).

Remember, you can access object properties through either dot notation or [] notation.

My approach

So, a function titled truthCheck which accepted an array of objects (collection) and pre (the key to check valid). Inside the function, I created for loop to access each object which I stored in a new variable that I named valAtIndex. Then created a conditional statement that check valAtIndex’s value same as pre is a valid, if it is not return false, else return true.

Code

function truthCheck(collection, pre) {
// Is everyone being true?
    for(var i in collection){
        var valAtIndex = collection[i];
        if(!valAtIndex[pre]){
        return false;
        }
    }
    return true;
}

truthCheck([{"user": "Tinky-Winky", "sex": "male"}, 
{"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, 
{"user": "Po", "sex": "female"}], "sex");