如何在reactjs中将字符串从json响应转换为整数

IT技术 javascript angularjs reactjs
2021-05-13 06:20:34

如何将字符串从json转换为int

     if(this.state.chartCategory == 'D3Chart'){
      console.log("chartdata for d3 charts", this.state.d3line.chartData);
      var a = parseInt(this.state.d3line.chartData)
      console.log("a", a);
        switch(this.state.chartType){
          case 'area': return <div  style={{width: 900, height:300}}><Areagraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
          case 'pie': return  <div style={{width: 900, height:500}}><Piegraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
          case 'bar': return  <div  style={{width: 900, height:300}}><Bargraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
          case 'line' : return <div  style={{width: 900, height:300}}><Linegraph  data = {this.state.d3line.chartData} vars = {{x:this.state.d3line.x, y: this.state.d3line.y, group: this.state.d3line.x}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
          default: return null;
       }   

    }

我得到一个作为 NAN 我想检查值是否是整数，将字符串转换为整数，否则它应该保持不变

提前致谢

1个回答

我想这就是你所追求的。

（诚​​然，在 ES6 中有更漂亮的方法来做到这一点）

if(this.state.chartCategory == 'D3Chart'){

    //convert all UNIT_PRICE values in this.state.d3line.chartData to number
    for(var i=0; i < this.state.d3line.chartData.length; i++)
    {
        this.state.d3line.chartData[i].UNIT_PRICE = parseInt(this.state.d3line.chartData[i].UNIT_PRICE);
    }

    switch(this.state.chartType){
      case 'area': return <div  style={{width: 900, height:300}}><Areagraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
      case 'pie': return  <div style={{width: 900, height:500}}><Piegraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
      case 'bar': return  <div  style={{width: 900, height:300}}><Bargraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
      /*case 'column': return  <div className = "graphContainer" style={{width: 900, height:300, overflow: "hidden", resize: "both", paddingBottom: "10px", border: "1px solid black"}}><Columngraph  data = {this.state.d3line.chartData} vars = {{x: this.state.d3line.x, y: this.state.d3line.y}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;*/
      case 'line' : return <div  style={{width: 900, height:300}}><Linegraph  data = {this.state.d3line.chartData} vars = {{x:this.state.d3line.x, y: this.state.d3line.y, group: this.state.d3line.x}} dispatch = {this.showFilter} title = {this.state.data.chartName}/></div>;
      default: return null;
   }   

}
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