Search multiple strings with indexOf() and add to Array

Question

I have following working code.

indexMatches = [];
function getMatchIndexes(str, toMatch) {
    var toMatchLength = toMatch.length,
        match,
        i = 0;

    while ((match = str.indexOf(toMatch, i)) > -1) {
        indexMatches.push(toMatch);
        i = match + toMatchLength;
    }
    return indexMatches;
}

console.log(getMatchIndexes("this is code [table which has [table table [row and rows [table]", "[table"));

Fiddle here: https://jsfiddle.net/vqqq1wj4/

However I have to match 2 string to search [table and [row and add to indexes. Currently it accepts only 1 parameter to search. I tried adding the same with OR operator in while but it doesnt work. Ideally I should write the following code

getMatchIndexes(str, "[table","[row");

and it would return the array below according to their index and positions properly.

 [ "[table", "[table", "[row", "[table" ]

Answer 1

Use String#match with regex which is generated using the string.

function getMatchIndexes(str, ...toMatch) {
  return str.match(
    // generate regex
    new RegExp(
      // iterate over strings
      toMatch.map(function(v) {
        // escape symbols which has special meaning in regex
        return v.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&')
      // join with pipe operator and specify g for global match
      }).join('|'), 'g'));
}

console.log(getMatchIndexes("this is code [table which has [table table [row and rows [table]", "[table", "[row"));

---

Refer : Converting user input string to regular expression