If I have an object
post = {
title: "Title",
image_1: "1234",
image_2: "2345"
}
and I want to get an array:
["1234", "2345"]
This is how I filter attributes to be included in the array
Object.keys(post).filter(key =>
key.includes("image")
);
and get an array of correct keys. How do I get values instead?
One way is to just do your filter then map the object lookup:
Object.keys(post)
.filter(key => key.includes("image"))
.map(key => post[key])
Or, use Object.entries to get both keys and values:
Object.entries(post)
.filter(([key, value]) => key.includes("image"))
.map(([key, value]) => value)
Or, with a "filter and map" operation:
Object.entries(post)
.flatMap(([key, value]) => key.includes("image") ? [value] : [])
You can use Object.entries to get a list of key-value pairs, and .forEach to iterate over it:
const post = {
title: "Title",
image_1: "1234",
image_2: "2345"
};
const res = [];
Object.entries(post).forEach(([key,value]) => {
if(key.includes("image")) res.push(value);
});
console.log(res);
const post = { title: "Title", image_1: "1234", image_2: "2345" };
const keys = Object.keys(post).filter(key => key.includes("image"));
const output = keys.map(key => post[key]);
console.log(output); // [ '1234', '2345' ]
You could use reduce method on Object.entries and check if the key startsWith a specific string.
const post = {
title: "Title",
image_1: "1234",
image_2: "2345"
}
const result = Object
.entries(post)
.reduce((r, [k, v]) => {
if (k.startsWith('image')) r.push(v);
return r;
}, [])
console.log(result)Object.entries to obtain entries, then filter those which starts with image:
let post={title:"Title",image_1:"1234",image_2:"2345"};
let result = Object.entries(post)
.filter(e => e[0].startsWith('image'))
.flatMap(e => e[1])
console.log(result)
Object.valuesinstead ofObject.keys. Do you want a value based on the key or get all of the values fromincludesor something?Object.entriesand compare using the object's key