JSON从数字中删除引号

Question

我想将JSON对象转换为字符串，但没有引号

这是我的代码：

function someAsyncOp(item) {...} // returns a promise

var source = Rx.Observable.from([{item1},{item2},...])
source
   //Only allow a max of 10 items to be subscribed to at once
  .flatMapWithMaxConcurrent(10, (item) => {

    //Since a promise is eager you need to defer execution of the function
    //that produces it until subscription. Defer will implicitly accept a promise
    return Rx.Observable.defer(() => someAsyncOp(item))

    //If you want the whole thing to continue regardless of exceptions you should also
    //catch errors from the individual processes
                        .catch(Rx.Observable.empty())
  })
  .subscribe(
    console.log, 
    console.error, 
    () => console.log('completed')
  )

这里我从false和true值以及属性名称中删除引号 现在我想从数字值中删除引号。

我怎样才能写我的正则表达式？