在函数中分配值后，将全局变量分配给对象

Question

有一个带有某些默认值的全局变量，但是在某些函数中已将其重新分配。有一个对象要分配给更新的全局变量值。

尝试过函数返回值，也没有将对象放入函数中，但这两种方法都无法正常工作。面临的挑战是，在为所有对象和变量赋值之后，javascript中的函数将在稍后运行

//variable declaration(myObservable )
var myObservable = ko.observable('66');

//function definition
self.PortfolioPerformance_getval = function () {
  $.getJSON("/oracle-html-final/web/js/model/portfolioPerformance.json").then(function (deals) {

    var tempCols = [];
    var tempCols1 = [];
    for(var property in deals.item[0]) {
      self.portmax(parseInt(deals.item[0].target));

      self.myObservable = ko.observable(self.portmax());
      alert('jj'+myObservable());
      target_textval = parseInt(deals.item[0].target);
      console.log('dddd'+target_textval);
      self.portfolioPerformance_Value(parseInt(deals.item[0].portfolio_per_val));
      console.log("jinn"+deals.item[0].portfolio_per_val);
      self.h_val(deals.item[0].net_profit);
      // self.portfolioPerformance_Target = ko.observable({text: 'Target: '+ this.a});

    }

  }).fail(function(req, status, error) { alert('getJSON failed: ' + status); })

}
self.PortfolioPerformance_getval();  

//object where the value is to be reassigned
self.portfolioPerformance_Target = ko.observable({

  text: 'Target: '+ myObservable(),
  "textType": "number",
  style: {
    color: '#666666',
    fontSize: '14px'
  },
  rendered: 'on',
  /*  converter: converterFactory.createConverter({
          style: 'currency',
          currency: 'USD'
        })*/
});