Question

Write JavaScript function that matches all words in a text, a word is anything that consists of letters, numbers or underscores (_).

The input comes as single string argument – the text from which to extract the words.

Examples:

Input:
'A Regular Expression needs to have the global flag in order to match all occurrences in the text'

Output:

A|Regular|Expression|needs|to|have|the|global|flag|in|order|to|match|all|occurrences|in|the|text

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Input:
'_(Underscores) are also word characters'

Output:
_|Underscores|are|also|word|characters

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The output should be printed on the console and should consist of all words concatenated with a “|“(pipe), check the examples bellow to better understand the format.

Answer 1

Use regex (read more here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions)

The solution (see line 2 (line 3 also works just fine)):

function matchWords(str) {
    let pattern = /([a-zA-Z-0-9_]+)/g;
    //or //let patternTwo = /\w+/g;

    console.log(str.match(pattern).join("|"));
}

matchWords('A Regular Expression needs to have the global flag in order to match all occurrences in the text');