Is there a better way of writing variableName[0]?-CodePudding

Is there a better of writing const data = variableName[0]? I mean for variableName[0]. I do understand data is placed in index 0, but writing a number does not look professional ( to me atleast), So if there is some professional way someone knows, please share

To be more accurate, this is the case when the array has ONLY 1 element

CodePudding user response：

You can try to use the array destructuring syntax:

const variableName = [1];
const data = variableName[0];
console.log(data);

const [data2] = variableName;
console.log(data2);

In above example it takes first array element and ignores the other ones. You can also destructure more than one element into named variables:

const [variable1, variable2] = yourArray;

CodePudding user response：

The following is the shortest syntax in the modern JavaScript:

const [data] = variableName;

CodePudding user response：

I would say that what looks potentially unprofessional is not so much writing a number, but rather storing data in an array like this. If your variable was an object {data: "someData"} instead of an array ["someData"] , then you could write

const {data} = variableName;

If you can't change the format, then there is nothing really wrong with variableName[0], but if you really want to avoid writing a number you could write

const [data] = variableName;

This may look a bit more cryptic to people not used to this syntax, though.

CodePudding user response：

or a modern approach

    const arrayData = [1, 2, 3, 4]
    const variable = arrayData.at(0)
    console.log(variable)

CodePudding user response：

You can use spread operator. I'm really sorry for the first answer, try with this

const [first,...data] = arr
console.log(first);