react.js foreach variabler Fehler

Question

Warum bekomme ich Datensatz ist nicht in der Konsole definiert? Es tut auch

this.props.records.forEach(function(record){ 
     numbers.push(  
     <tr key={record.id} > 
      <td>{record.title}</td> 
     </tr>) 
     }) 

Fehler in der Konsole

Uncaught ReferenceError: record is not definedReact.createClass.onChange @ Inline JSX script:137React.createClass.changeHandler @ Inline JSX script:82ReactClass.createClass._handleChange @ react-with-addons.js:9067executeDispatch @ react-with-addons.js:3307forEachEventDispatch @ react-with-addons.js:3295executeDispatchesInOrder @ react-with-addons.js:3316executeDispatchesAndRelease @ react-with-addons.js:2689forEachAccumulated @ react-with-addons.js:19368EventPluginHub.processEventQueue @ react-with-addons.js:2896runEventQueueInBatch @ react-with-addons.js:11161ReactEventEmitterMixin.handleTopLevel @ react-with-addons.js:11187handleTopLevelImpl @ react-with-addons.js:11273Mixin.perform @ react-with-addons.js:18340ReactDefaultBatchingStrategy.batchedUpdates @ react-with-addons.js:9613batchedUpdates @ react-with-addons.js:16573ReactEventListener.dispatchEvent @ react-with-addons.js:11367 

Answer 1

Chancen einen beliebigen Wert drucken sind Ihre Array enthält einige undefined Werte (z [{id: 1}, undefined, {id: 2}]).

console.log(this.props.records); 
// or set a debugger statement to inspect the state