ezprice_interview_question

basic_calculator.js

//https://leetcode.com/problems/basic-calculator/description/
var calculate = function(s) {
  
  var positiveArr = s.replace(/\s|\(|\)|\-\d{1}/g,"").split(/\+/);
  var positiveNum = positiveArr.reduce( (x,y) => parseInt(x) + parseInt(y) );
  var hasNegative = s.replace(/\s|\(|\)/g,"").replace(/^\d{1}|\+\d{1}/g, "");
  var negativeNum, negativeArr;

  if (hasNegative) { 
      negativeArr = hasNegative.split(/\-/).filter(x=>x);
      negativeNum = parseInt(negativeArr.reduce( (x,y) => parseInt(x) + parseInt(y) ));
  } else {
      negativeNum = 0;
  };

  return positiveNum - negativeNum;
};

regular_expression_matching.js

// https://leetcode.com/problems/regular-expression-matching/description/
var isMatch = function(s, p) {
  const re = new RegExp(p);
  const supportRe = new RegExp(/\.|\*/); 
  if (supportRe.test(p)) {
    return re.test(s);
  } else {
    return s == p;
  }
};