试试这个作为休息;

angular.forEach([0,1,2], function(count){
  if(count == 1){
    return true;
  }
});

据我所知，Angular并没有提供这样的函数。你可能想要为此使用下划线的find()函数(它基本上是一个forEach，一旦函数返回true就会跳出循环)。

http://underscorejs.org/#find

使用Array Some方法

 var exists = [0,1,2].some(function(count){
      return count == 1
 });

Exists将返回true，您可以将其用作函数中的变量

if(exists){
    console.log('this is true!')
}

数组一些方法- Javascript

onSelectionChanged(event) {
    let selectdata = event['api']['immutableService']['gridOptionsWrapper']['gridOptions']['rowData'];
    let selected_flag = 0;

    selectdata.forEach(data => {
      if (data.selected == true) {
        selected_flag = 1;
      }
    });

    if (selected_flag == 1) {
      this.showForms = true;
    } else {
      this.showForms = false;
    }
}

$scope.arr = [0, 1, 2];  
$scope.dict = {}
for ( var i=0; i < $scope.arr.length; i++ ) {
    if ( $scope.arr[i] == 1 ) {
        $scope.exists = 'yes, 1 exists';
        break;
    }
 }
 if ( $scope.exists ) {
     angular.forEach ( $scope.arr, function ( value, index ) {
                      $scope.dict[index] = value;
     });
 }

只需添加$index并执行以下操作:

angular.forEach([0,1,2], function(count, $index) {
     if($index !== 1) {
          // do stuff
     }
}