javascript find with regex code example

Example 1: js string to regex

const regex = new RegExp('https:\\/\\/\\w*\\.\\w*.*', 'g');

Example 2: js match any number string

const match = 'some/path/123'.match(/\/(\d+)/)
const id = match[1] // '123'

Example 3: how to use the match function in javascript for regex

const str = 'For more information, see Chapter 3.4.5.1';
const re = /see (chapter \d+(\.\d)*)/i;
const found = str.match(re);

console.log(found);

// logs [ 'see Chapter 3.4.5.1',
//        'Chapter 3.4.5.1',
//        '.1',
//        index: 22,
//        input: 'For more information, see Chapter 3.4.5.1' ]

// 'see Chapter 3.4.5.1' is the whole match.
// 'Chapter 3.4.5.1' was captured by '(chapter \d+(\.\d)*)'.
// '.1' was the last value captured by '(\.\d)'.
// The 'index' property (22) is the zero-based index of the whole match.
// The 'input' property is the original string that was parsed.

Example 4: how to english paragraph matching in javascript

var text = "If he's restin', I'll wake him up! (Shouts at the cage.) 'Ello, Mister Polly Parrot! (Owner hits the cage.) There, he moved!!!\r\n\r\nNorth Korea is accusing the U.S. government of being behind the making of the movie \"The Interview.\"\r\n\r\nAnd, in a dispatch on state media, the totalitarian regime warns the United States that U.S. \"citadels\" will be attacked, dwarfing the attack on Sony that led to the cancellation of the film's release.\r\n\r\nWhile steadfastly denying involvement in the hack, North Korea accused U.S. President Barack Obama of calling for \"symmetric counteraction.\"\r\n\r\n\"The DPRK has already launched the toughest counteraction. Nothing is more serious miscalculation than guessing that just a single movie production company is the target of this counteraction. Our target is all the citadels of the U.S. imperialists who earned the bitterest grudge of all Koreans,\" a report on state-run KCNA read.";

var splitSentences = function() {

  var pattern = /(.+?([A-Z].)[\.|\?](?:['")\\\s]?)+?\s?)/igm, match;
  var ol = document.getElementById( "result" );
  while( ( match = pattern.exec( text )) != null ) {
    if( match.index === pattern.lastIndex ) {
      pattern.lastIndex++;
    }
    var li = document.createElement( "li" );
    li.appendChild( document.createTextNode( match[0] ) );
    ol.appendChild( li );
    console.log( match[0] );
  }

}();