Filtering result

user_12479952 0
Viewed 178

It is regarding filtering the result. Following code is working fine. But I would like to add one more field. video.description want to add along with video.title 

      exports.getSearchvideo = async (req, res) => {
      try {
        const videos = await Video.find();
        const index = videos.filter(
          video =>
            video.title
              .toLowerCase()
              .toString()
              .indexOf(req.params.word.toLowerCase().toString()) > -1
// want to add video.description
        );
        res.send(index);
      } catch (error) {}
    };
reactjs node.js javascript
4 Answers

You can do:

const result = videos.filter(v => 
  ['title', 'description'].some(prop =>
    v[prop].toLowerCase().includes(req.params.word.toLowerCase()))
)

Code example:

// API videos response
const videos = [{ title: 'Title for Video 1', description: 'Description', }, { title: 'Title for Video 2', description: 'Some description here' }]
const word = 'VIDEO 1'

const result = videos.filter(v =>
  ['title', 'description'].some(prop => v[prop].toLowerCase().includes(word.toLocaleLowerCase()))
)

console.log(result)

user_19325520

If you want to execute more then just one line of code, you can use the curly brackets.

for example: 

video => { 
    const titleResult = video.title.toLowerCase().indexOf(req.params.word.toLowerCase()) > -1 
    const descriptionResult = video.description.toLowerCase().indexOf(req.params.word.toLowerCase()) > -1 
    return result1 && result2 
}

And you don't need toString() after toLowerCase(), because it already returns string

user_32468240

First, you do not need to add toString after toLowerCase - toLowerCase is a member function of string, so you'd get an error for calling it on a value that is not a string (if anything, if you're not sure of the input, do a toSatring().toLowerCase()).

Second, you can use .includes to find a substring. No need for indexOf.

Finally, if you need to add another condition, use the logical AND (&&) to add the description condition to the filter function:

const index = videos.filter(
    video =>
        video.title.toString().toLowerCase()
            .includes(req.params.word.toString().toLowerCase())
        && video.description.toString().toLowerCase()
            .includes(req.params.anotherWord.toString().toLowerCase())
);
user_198560

Inside .filter callback you can't modify a value. Use forEach instead. So, you loop through the videos once and you can do with a value whatever you want.

const videos = [ {a:1}, {b:2} ]
const result = []

videos.forEach(value => {
   if (value.a) {
      value.desription = 'test'
      result.push(value)
   }
})

result -> [ {a: 1, description: 'test'} ]
user_59816610
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