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calculations

justFiona Jan 15th, 2016 (edited) 64 Never
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  1. <script>
  2.  
  3. var inputExprArray = "1+3*3/5*8*9+7-2*2";
  4.  
  5. var signArr = inputExprArray.split(/[(0-9),*,\/]+/);
  6. var numbArr = inputExprArray.split(/[+,\-]+/)
  7.  
  8. console.log(signArr);
  9. console.log(numbArr);
  10.  
  11.  
  12.  
  13. var newArray = numbArr.map(function multiplication(input){
  14. console.log(input);
  15. if(input.search(/[*,\/]+/) == -1){return input;}
  16. else{
  17. var multipl = input.split(/[0-9]+/);
  18.     var numbers = input.split(/[*,\/]+/);
  19.     multipl.pop();
  20.    
  21.     console.log(multipl);
  22.    
  23.     console.log(numbers);
  24.  
  25. var multOfArr = numbers.reduce(function(previousValue, currentValue, currentIndex, array) {
  26.     if (multipl[currentIndex] == ""  ){
  27.   return parseFloat(currentValue)* 1; }
  28.   else if(multipl[currentIndex] == "*"  ){return parseFloat(previousValue) * parseFloat(currentValue);}
  29.  
  30. else{return parseFloat(previousValue) *(1/ parseFloat(currentValue));}
  31.  
  32. });
  33. return multOfArr;}
  34. console.log(multOfArr);
  35.  
  36. }
  37.     );
  38. console.log(newArray);
  39. var lastArr = newArray.reduce(function(previousValue, currentValue, currentIndex, array) {
  40.     if (signArr[currentIndex] == "" ||signArr[currentIndex] == "+" ){
  41.   return parseFloat(previousValue)+ parseFloat(currentValue); }
  42.   else {return parseFloat(previousValue) - parseFloat(currentValue);}
  43. });
  44.  
  45.  
  46. console.log(lastArr);
  47. </script>
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