How can I replace accessing the temp variable values from the following code extract? I have tried to get all values through the default JS code, however, I would like to use destructuring here
const temp = context.options[0]; // <----- here
const avoidPattern = [
'foo', 'bar', 'abc', 'value', 'temp', 'num'
];
return [...avoidPattern, ...temp]
You might use this
const context = { options: [1,2,3] } const [temp] = context.options; console.log(temp)
This can also be possible if we destructure object
and array
at the same time.
const context = { options: [1, 2, 3] }; const { options: [temp] } = context; console.log(temp);
let arr=['data','title','image']; let [first]=arr[1]; console.log(first);
An interesting that Array in JavaScript is an object, So you can destructure an array as object like this
const context = { options: [1, 2, 3] }; const { options } = context; // [1, 2, 3] const {0:firstItem } = options; console.log(firstItem);
options
array is integer
number.
Actually, it's index.
In this way, you can destructure an array with the long array by index in the that way.
More details here: Object destructuring solution for long arrays?
If you want to destructure the first element out of the options
array.
options
property from the context
object.options
array. const context = { options: [1, 2, 3] }; // Destucture the options key property const {options} = context console.log(options) // [1,2,3] // Next, destructure the first item from the array const [first] = options console.log(first) // 1
You can also combine the two steps mentioned above using the colon :
operator, which is used to provide an alias while destructing an object.
const context = { options: [1, 2, 3] }; // Destucture the options property // and in the alias destructure the first item of the array const {options: [first]} = context console.log(first) // 1
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