I'm trying to figure out how to loop over two objects at the same time so that I can compare their properties. What I tried was something like
for ((prop1, prop2) in (obj1, obj2) {
console.log(prop1 == prop2)
}
which definitely didn't work. How do I do this in js?
In a basic way, would be it:
var obj1 = {
prop1: 'prop1',
prop2: 'prop2'
};
var obj2 = {
prop1: 'prop1',
prop2: 'prop2',
prop3: 'prop3'
};
for (var prop in obj1) {
console.log(prop, obj1[prop] == obj2[prop]);
}
You can use Object.keys() and Object.assign() function.
Object.keys(Object.assign({}, obj1, obj2)).forEach(function(key) {
var prop1 = obj1[key];
var prop2 = obj2[key];
console.log(prop1 == prop2);
});
Note: check for browser compatibility of Object.assign() function. Currently it is not supported by IE.
You can't, you need to do it in 2 for.
for (var prop1 in obj1) {
for(var prop2 in obj2)
console.log(prop1 == prop2);
}
You could try that too, without 2 loops:
for (var prop1 in obj1) {
console.log(obj2[prop1] === undefined);
}
