const regex = new RegExp('(?=\\. [a-z1-9\\. ]*?com/)\\. ', 'gm')
const str = `Eastern Illinois University is one of only three universities in the United States to run its own newspaper printing press http://www. dailytexanonline. com/top-stories/student-media-board-votes-to-sell-press-1.1309992 and is one of the smallest universities in the country to have a daily newspaper. The paper was renamed Teacher's College News and Eastern State News before its current name was chosen in 1980. http://media. www. dennews. com/media/storage/paper309/news/2005/11/04/News/The-News. Turns.90-1045667. shtml Notable alumni of the newspaper include Wall Street Journal reporter Cam Simpson`;
const subst = `.`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions