Write a React Component from Scratch-The idle Process

Write a React Component from Scratch

// Change code below this line

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
  }
  render() {
    return (
      // The JSX code you put here is what your component will render
      <div><h1>My First React Component!</h1></div>
    );
  }
};

ReactDOM.render(<MyComponent />,document.getElementById('challenge-node'));

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Low risk, high reward: the asymmetric black swan trade

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javascript Mutations

Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array. For example, ["hello", "Hello"], should return true because all of the letters in the second string are present in the first, ignoring case. The arguments ["hello", "hey"] should return false because the string hello does not contain a y. Lastly, ["Alien", "line"], should return true because all of the letters in line are present in Alien. function mutation ( arr ) { var temArr =[]; for ( let i = 0 ; i < arr [ 1 ]. length ; i ++) //要比较的是第二个数组的，所以放在外层，内层每次都要遍历第一个数组，让第二个数组中的字符去与每一个第一个数组中的字符比较，相等就push一个true，然后马上跳出内循环 { for ( let j = 0 ; j < arr [ 0 ]. length ; j ++) { if ( arr [ 1 ][ i ]. toUpperCase ()== arr [ 0 ][ j ]. toUpperCase ()) ...

The idle Process

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