在渲染一个从后端获取的列表时出现错误:indicating it's undefined,我去查看了控制台日志,确认数组中有 5 个子项。 class PubSubTopics extends React.Component{ constructor(props){ super(props); this.state = { pubsubtopics: ['one', 'two', 'three'], } } componentDidMount() { this.callBackEndA...
function must take that many arguments and is applied to the items from all iterables in parallel...
} = myobj;// TypeError: object is not iterable constobj = {France:"Paris",England:"London"}; for(constpofobj) { // … }// TypeError: obj is not iterable JS 中有内置的可迭代对象,如:String、Array、TypedArray、Map、Set以及Intl.Segments (en-US),因为它们的每个prototype对象都实现了@@iter...
StatusBar}from"react-native";import{createAppContainer,createSwitchNavigator,createBottomTabNavigator}fro...
} // TypeError: obj is not iterable JS 中有内置的可迭代对象,如:String、Array、TypedArray、Map、Set以及Intl.Segments (en-US),因为它们的每个prototype对象都实现了@@iterator方法。 Object是不可迭代的,除非它们实现了迭代协议。 简单来说,对象中缺少一个可迭代属性:next函数 ...
[25612:0213/000536.210:ERROR:CONSOLE(160)] "Electron sandbox_bundle.js script failed to run", source: node:electron/js2c/sandbox_bundle (160) [25612:0213/000536.210:ERROR:CONSOLE(160)] "TypeError: object null is not iterable (cannot read property Symbol(Symbol.iterator))", source: node:elec...
interfaceuser{name:string,id:string}interfaceAppprops{userList:user[]}//此时如果使用 ...扩展运算符展开userList,ts会报错 说未实现Iterable接口// eg a= [...user]//改造userinterfaceuser{name:string,id:string,[Symbol.iterator]():Iterator,}//如果想通过 user['name'] 的方式获取或设置user.name的...
Bug: TypeError: Object is not a function or its return value is not iterable (0.0.0-experimental-7b84dbd16) I am playing around with concurrent mode and get this error when calling useTransition. Has this function been removed or renamed?
在启动的时候如果报错Inline JavaScript is not enabled. Is it set in your options?的话就得去配置 less-loader 找到config 文件夹下面的webpack.config.js文件修改getStyleLoaders方法 if (preProcessor && preProcessor === 'less-loader') { loaders.push( ...
Immutable.fromJS({a: {b: [10,20,30]},c:40});console.log(t1);// 不常用const t2 = Immutable.fromJS({a: {b: [10,20,30]},c:40},function(key, value) {// 定制转换方式,下这种就是将Array转换为List,Object转换为Mapconst isIndexed = Immutable.Iterable.isIndexed(value);return is...