I'm relatively new to Javascript, and there's probably just a trick I'm not familiar with, but how can I assign boolean values to Array keys?
What's happening:
var test = new Array();
test[false] = "asdf";
test['false'] = "fdsa";
Object.keys(test); // Yield [ "false" ]
Object.keys(test).length; // Yield 1
What I want to happen:
var test = new Array();
//Some stuff
Object.keys(test); // Yield [ "false" , false ]
Object.keys(test).length; // Yield 2
You can't use arbitrary indexes in an array, but you can use an object literal to (sort of) accomplish what you're after:
var test = {};
test[false] = "asdf";
test['false'] = "fdsa";
However it should be noted that object properties must be strings (or types that can be converted to strings). Using a boolean primitive will just end up in creating an object property named 'false'.
test[false] === test['false'] === test.false
This is why your first example's Object.keys().length call returns just 1.
For an excellent getting started guide on objects in JavaScript, I would recommend MDN's Working with objects.
var obj = { }; obj[1] = 'foo' }). Typically you would use an object and then create a property of that object that's an array: var obj = { }; obj.ArrayProp = [];. Hope that helps...Arrays in Javascript aren't associative, so you cannot assign values to keys in them.
var test = [];
test.push(true); // [true]
test.push(false); // [true, false]
You're interested in an Object!
var test = {};
test[true] = "Success!";
test[false] = "Sadness"; // {'false': "Sadness", 'true': "Success"}
you could also reverse the answer above such as
let test = [true];
console.log(typeof test);
// Output: Object True
Javascript arrays are only number index based. You could use 0 and 1 as keys (although I can't think of a case where you need boolean keys). myArr[0] = "mapped from false"; myArr[1] = "mapped from true";
