Map on array and save item to other array in Vue

Question

I have a array of arrays:

[["email", "[email protected]"], ["phone", 123123123], ["address", "street"]]

I want to create array where I will have only first element from every array:

["email", "phone", "address"]

I have something like that:

bigArray.map((field) => {
        this.smallArray.add(field[0]);
      });

but I got error: Error in event handler for "bigArray": "TypeError: _this.smallArray.add is not a function"

How can I solve this issue?

Yosvel Quintero · Accepted Answer · 2021-09-09 10:42:24Z

1

const arr = [["email", "[email protected]"], ["phone", 123123123], ["address", "street"], ["sameple"]]
const result = arr
  .filter(a => !!a[1])
  .map(a => a[0])

console.log(result)

edited Sep 9, 2021 at 10:42

answered Sep 9, 2021 at 10:29

Yosvel Quintero

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3 Comments

edi233 Over a year ago

one more thing: How can I add condition that this value should be added only when item[1] is empty?

Yosvel Quintero Over a year ago

Updated answer.. First you should filter

edi233 Over a year ago

Perfect, Thank you!

Jay Li · Accepted Answer · 2021-09-09 10:28:24Z

1

this.smallArray = this.bigArray.map(arr => arr[0])

answered Sep 9, 2021 at 10:28

Jay Li

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1 Comment

edi233 Over a year ago

one more thing: How can I add condition that this value should be added only when item[1] is empty?

abubakri olaitan · Accepted Answer · 2021-09-09 10:32:50Z

0

I think you are tyring to add filtered element to smallArray. You should use.

this.smallArray.push(field[0]);

answered Sep 9, 2021 at 10:32

abubakri olaitan

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