const pairs = { a : 1, b : 2, c : 3 }
const keyArray = [a, b, c]
I'm trying to get a function or w/e that returns [1, 2, 3]. can't think of anything please help
4 Answers
In javascript all keys of an object are actually strings, and can be addressed using the same strings.
Your code is creating an array containing the values of the - possibly uninitialized - variables a, b and c, which then produces [undefined, undefined, undefined], or else whatever those variables contain.
You need to make keyArray contain strings instead, and then you can use the map() function to produce the desired result:
const pairs = { "a" : 1, "b" : 2, "c": 3 }
const keyArray = ["a", "b", "c"]
const values = keyArray.map(key => pairs[key]);
console.log(values);
1 Comment
Jesse Q
For my money, this is the better/best answer.
const pairs = { 'a' : 1, 'b' : 2, 'c': 3 }
const keyArray = ['a', 'b', 'c']
for(const item of keyArray)
{
console.log(pairs[item])
}
You need to make your items inside the array and object as strings
2 Comments
user18443097
thanks for the help. it actually worked i was stuck on it for a while
Sulove Dahal
I am glad that I could help you. Happy Coding 😀
Well since it's Javascript
Object.values() should do it.
const keyArray = Object.values(pairs)
Comments
const pairs = { 'a' : 1, 'b' : 2, 'c': 3 }
for(const [key , value] of Object.entries(pairs))
{
console.log(key) // a , b, c
console.log(value) // 1, 2, 3
}
pairsthat have keys specified inkeyArray?