Get all words in a string Javascript

Question

I've seen this question a few times but all seem to ask questions differently than mine thus I'm having a few problems trying to wrap my head around how i'd handle what i'm trying to do.

I have a file that I create in node, basically a JSON object stringified.

I read the file like so :

fs.readFile('data.txt', 'utf-8', function (err, data) {
    console.log(data.search("generated_images"));

    if (err) {
        return console.error(err);
    }
});

How can I do a search on the text file I have and find every time generated_images has been used in there?

I'm basically trying to get the word generated_images then grab characters after it so...

Everytime generated_images is used, count 80 characters after and write it to a new array or new text file I can read.

This sounds like an XY Problem - why not just parse the stringified JSON and traverse the object normally? — James Thorpe
– James Thorpe, Commented Jun 13, 2016 at 11:45
It doesn't contain JSON anymore, because I stringified it when writing it to a new file. I did fs.writeFile('data.txt', JSON.stringify(data), function(err) {) — pourmesomecode
– pourmesomecode, Commented Jun 13, 2016 at 11:47
The output of JSON.stringify() is JSON. In other words, JSON is a string representation of an object. (There's no such thing as a "JSON object".) You use JSON.parse() to turn the string back into an actual object. — nnnnnn
– nnnnnn, Commented Jun 13, 2016 at 11:49
if data.txt contains json data, you can use JSON.parse(data) to get json object and traverse object normally to get your job done. — Alongkorn
– Alongkorn, Commented Jun 13, 2016 at 12:27

Chad Robinson · Accepted Answer · 2016-06-13 13:58:35Z

1

You have some discussion of JSON above, but in your question you specifically ask how to grab "80 chars after"... A regular expression is a fast way to achieve this. Consider this input text:

var data = 'asdf qwer asdf asfwe generated_images 12345678901234567890123456789012345678901234567890123456789012345678901234567890 adsf weqr asdfjkaekl zdfjhasdf generated_images abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab';

Then this code will return the results shown::

data.match(/generated_images .{0,80}/g);

['generated_images 12345678901234567890123456789012345678901234567890123456789012345678901234567890',
 'generated_images abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab']

answered Jun 13, 2016 at 13:58

Chad Robinson

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