javascript - lodash .get replace empty value - Stack Overflow

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so i am using lodash .get to copy some array from my database to create a excel documents by using this

object[key.key] = _.get(item, key.key, '-');

where key is set of array and key.key is set of array column name or field name. it works fine replacing undefined value from database to - but there is also some fields that just have an empty value and i want to catch those fields and also changing it into -

how to do that?

so i am using lodash .get to copy some array from my database to create a excel documents by using this

object[key.key] = _.get(item, key.key, '-');

where key is set of array and key.key is set of array column name or field name. it works fine replacing undefined value from database to - but there is also some fields that just have an empty value and i want to catch those fields and also changing it into -

how to do that?

• javascript
• arrays
• lodash

Share Improve this question Follow asked Mar 9, 2018 at 14:27 PamanBeruangPamanBeruang 1,58955 gold badges3030 silver badges6464 bronze badges 3

• What is an "empty value"? An empty string, null, ...? – Andreas Commented Mar 9, 2018 at 14:31
• empty string like "" – PamanBeruang Commented Mar 9, 2018 at 14:41
• Thanks for asking the perfect question. I had this exact same problem. – Rutwick Gangurde Commented Jun 24, 2020 at 18:02

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2 Answers 2

Sorted by: Reset to default 10

If there won't be any other "falsy" values the shortest way would be:

obj[key.key] = item[key.key] || '-';

// or with lodash
obj[key.key] = _.get(item, key.key, '-') || '-';

This will replace every "falsy" value with a single dash.

If this isn't possible:

const value = item[key.key];
obj[key.key] = (typeof value === 'undefined' || value === '') ? '-' : value;

// or with lodash
const value = _.get(item, key.key, '-');
obj[key.key] = value === '' ? '-' : value;

This should work:

_.get(item, key.key, '-') != '' ? _.get(item, key.key, '-') : '-';

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