Im'm working on a JavaScript side prokect and I've got a json file with an array with arrays like this:
arr =
{
"values": [
["Form Factor", "OS"],
["Landscape", "Android 9\n(Source)"],
["Portrait", "Analogue OS"],
["Micro\nLandscape", "?"]
]
}
The first array with "Form factor" (index 0) are the headlines. If I want to get all the "form factors" from the arrays how would I do that?
I know that "Form Factor" has index 0 but how do i filter through several arrays at once with an index? in the end I want an array like
results = ["Form Factor", "Landscape", "Portrait", "Micro\nLandscape"]
I tried it like this:
const index = 0;
const result = this.arr.values.filter(function (eachElem) {
return eachElem == index;
});
But that just gives me back an empty array.
Your code isn't working because a) index isn't defined, you need to also put it as a parameter and b) in your case no element will be true. I would use a traditional for loop in your case but surely if you want you can do it with es6 magic.
let result = [];
for (let i = 0; i < arr.values.length; i++) {
result.push(arr.values[i][0]);
}
console.log(result);
Just use array.find() it's much easier and you can search for your element in your array:
const found = array1.find(element => element > 10);