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JavaScript

Lean Rasmussen
Lean Rasmussen
11,060 Points
Posted by Lean Rasmussen
Lean Rasmussen
11,060 Points

referring to objects in arrays

I am having difficulties with referring to objects in arrays.

Normally when you make an object you assign it to a variable.

var name {

prop1 : value1,

prop2 : value2,
};

to refer to this I can just go name.prop1.

arrays we use position so eg. arrayName[0]

but if my object is inside the array it does not have a name. just a position. 

array[{

prop1 : value1,

prop2 : value2,
},

2]

here I can refer to array[0] to get to the array, but if I wanna get to the properties I dont know how. I can still got array[0].prop1 but I am having diffculties going trough the properties of and object in an array.

3 Answers

Chyno Deluxe
Chyno Deluxe
16,936 Points

Hey Lean, I am assuming you are asking how to loop through an array of objects. So my answer is below as well as a demo.

First you need to create a for loop to cycle through your array. Then, within your for loop you need to create a for...in loop to cycle through your objects. Like this.

var myArr = [{
  prop1: "Hello",
  prop2: ", ",
  prop3: "World",
  prop4: "!"
},{
  prop1: "Hello",
  prop2: ", ",
  prop3: "Internet",
  prop4: "!"
}];

for (var i = 0; i < myArr.length; i += 1) {
  for (var obj in myArr[i]) {
    console.log(myArr[i][obj]);
  }
}
Lean Rasmussen
Lean Rasmussen
11,060 Points
Lean Rasmussen
Lean Rasmussen
11,060 Points

As you say this was in the demo. But what if I wanna see what properties are in the object inside my array. So that I display not just the values, but the properties also.

Chyno Deluxe
Chyno Deluxe
16,936 Points

You can view all of the properties and values by logging your array to the console. Like this

for (var i = 0; i < myArr.length; i += 1) {
    console.log(myArr[i]); //this will display all properties and values that are in your array
  for (var obj in myArr[i]) {
    result.innerText += myArr[i][obj];
  }
}