Question

我想查看此功能的结果。但无法修复声明错误！

//-------create class: Addgifts-----
export default class Addgifts extends Component{
constructor(){
super()
this.state={
  value: [],
  options: [],
  staticOptions: [{ label: 'Chocolate', value: 'chocolate' },
            { label: 'Vanilla', value: 'vanilla' },
            { label: 'Strawberry', value: 'strawberry' },
          ]
 }
}

//-------Handle options--------
handleOptions(){
let KeyWords = this.props.tags;
for (i=0 ; i<KeyWords.length ; i++){
  return KeyWords[i].map.name((names)=>{
    console.log(name);
    return(
       this.state.options.push({label:{name},value:{name}});
      )
    }
  });
 }
}

//-----Select Change----
handleSelectChange (value) {
    console.log('You\'ve selected:', value);
this.setState({
    value
 });
}

//-----Select package----
<div>
 <Select
 multi={true}
 value={this.state.value}
 placeholder="Select all KeyWord(s)"
 options={this.handleOptions()}
 onChange={this.handleSelectChange.bind(this)} />
</div>

//-----subscribing tags from mongodb----
Addgifts.propTypes={tags: PropTypes.array.isRequired,};
export default createContainer(()=>{
Meteor.subscribe('tags');
return {gifts: Gifts.find({},{sort:{name:-1}}).fetch(),};
},Addgifts);

    import java.util.HashMap;


    public class twosum {
        public int[] twoSum(int[] nums, int target) {
java：-source 1.3中不支持泛型 java：-source 1.3
中不支持菱形运算符

   Map<Int, Int> map = new HashMap<>();

Answer 1

尝试

   Map<Integer, Integer> map = new HashMap<>();

或

   Map<Integer, Integer> map = new HashMap<Integer, Integer>();

我怎样才能声明hashmap？

1 个答案: