regexpression test stringified array of locations

valid-locations.js

/**
 
 test str is formatted "11.2,46.1|11,46|11.2,46.1|11.1,46.2"

 */
function validLocations(str) {

  const regAll = /(?=^([^\|]*\|){3}[^\|]*$)(?=^([^,]*,){4}[^,]*$)/
      // contains min 3 pipe and 4 commas
      , regPipe = /^([^\|]*\|){3,}[^\|]*$/
      // contains min 3 pipe
      , regComma = /^([^,]*,){4,}[^,]*$/
      // contains min 4 comma

  return regAll.test(str)
}