使用正则表达式在 JavaScript 中拆分字符串时遇到问题

Question

I am VERY new to regex in js and having a very hard time manipulating them to do what I am looking for.

I have a series of strings that I am trying to strip of unusual characters, spaces, newlines, etc. and put them into arrays where each entry is a word consisting of only alphanumeric characters.

For example:

 let testString = "this*is " + "a\n" +" test string " test = testString.split(/\W/) console.log(test)

Yields [ 'this', 'is', 'a', '', 'test', 'string', '' ]

But ideally I would like it to yield [ 'this', 'is', 'a', 'test', 'string']

I can achieve the desired result by adding .filter(word => word !== '') to the end, but I am wondering if there is a way to do this using only regular expressions? Also would it be necessary to add a global flag to the regex?

Thanks in advance for any input!

Answer 1

Just a simple one-liner:

function getWords  = s => ( s ?? "" ).match( /\w+/g );

Then...

const words = getWords( 'this, that & the other;etc.';

yields

[ 'this', 'that', 'the', 'other', 'etc' ]

Answer 2

Use the trim function to remove additional space around the sentence. More Information: https://www.w3schools.com/jsref/jsref_trim_string.asp

test = testString.trim().split(/\W/);