JavaScript Libraries

• http://mikemcl.github.io/decimal.js/

  
              javascript
              
              
  // Solve precision issues in JavaScript numerical calculations
  function main() {
      var x = -1.2
      var a = Decimal.abs(x)
      var b = new Decimal(x).abs()
      Log(a.equals(b))                           // true
  
      var y = 2.2
      var sum = Decimal.add(x, y)
      Log(sum.equals(new Decimal(x).plus(y)))    // true
  }
  

• http://underscorejs.org/

  
              javascript
              
              
  function main() {
      var sum = _.reduce([1, 2, 3], function(memo, num){return memo + num}, 0)
      Log(sum)
  }
  

• http://ta-lib.org/

  
              javascript
              
              
  function main(){
      var records = exchange.GetRecords()
      // Print all technical indicator data. On FMZ Quant Trading Platform, JavaScript strategies have the talib library built-in
      Log(talib.MACD(records))
      Log(talib.MACD(records, 12, 26, 9))
  }
  

• Dynamic Loading of JavaScript Libraries
  To use other third-party JavaScript libraries, you can dynamically load them as follows:

  
              javascript
              
              
  function main() {
      // via. https://cdnjs.com/libraries
      eval(HttpQuery("https://cdnjs.cloudflare.com/ajax/libs/mathjs/13.2.0/math.min.js"))
  
      Log(math.round(math.e, 3))                // 2.718
      Log(math.atan2(3, -3) / math.pi)          // 0.75
      Log(math.log(10000, 10))                  // 4
      Log(math.sqrt(-4))                        // {"mathjs":"Complex","re":0,"im":2}
  }