scramble

/*
Complete the function scramble(str1, str2) that returns true if a portion of str1 characters
can be rearranged to match str2, otherwise returns false.
*/

//less efficient:

function scramble(str1, str2) {
  var splitString1 = str1.split('');
  var splitString2 = str2.split('');
  var results = [];
  
    for(let i=0; i < splitString1.length; i++) {
      if(splitString2.indexOf(splitString1[i]) !== -1) {
        results.push(splitString1[i]);
        splitString2.splice(splitString2.indexOf(splitString1[i]), 1);

        if(results.length === str2.length) return true;
      }
    }
  
  if(results.length !== str2.length) return false;
}


//more efficient

function scramble(str1, str2) {
  
  const reducer = (container, element) => {
    if(container[element] === undefined) {
      container[element] = 1;
      return container;
    } else {
      container[element] += 1;
      return container;
    }
  }
  
  var container1 = str1.split('').reduce(reducer,{});
  
  var container2 = str2.split('').reduce(reducer,{});
  
  for (var prop in container2) {
    if(!container1[prop]) return false;
    
    if(container1[prop] < container2[prop]) return false;
  }
  return true;
}