Question

我需要浏览每个文本（父母和孩子）

示例js代码：

data: [
        { text: "Item 1" },
        { text: "Item 2", items: [
          { text: "SubItem 2.1" },
          { text: "SubItem 2.2" }
        ] },
        { text: "Item 3" }
      ]
angular.forEach(data, function (value, key) 
{
  console.log(value.text);
});`

此代码仅返回父文本。

Answer 1

它没有用，因为您没有循环使用子项。请参阅以下代码：

angular.module('app', [])
  .controller('ctrl', function() {
    var printItems = function(items) {
      angular.forEach(items, function(value, key) {
        console.log(value.text);

        if (value.items) {
          printItems(value.items);
        }
      });
    };

    var data = [{
      text: "Item 1"
    }, {
      text: "Item 2",
      items: [{
        text: "SubItem 2.1"
      }, {
        text: "SubItem 2.2"
      }]
    }, {
      text: "Item 3"
    }];
    
    printItems(data);
  });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="ctrl"></div>

它将逻辑提取到一个单独的函数，并递归调用它来遍历子项。

Answer 2

您应该使用baseurl <- "http://zoeken.kvk.nl/Address.ashx?site=handelsregister&partialfields=&q=010" pages3 <- list() for(i in 1:99999){ if(i < 10){ mydata <- RJSONIO::fromJSON(paste0(baseurl,"00000",i), flatten=TRUE) } if(i < 100 & i >= 10){ mydata <- RJSONIO::fromJSON(paste0(baseurl,"0000",i), flatten=TRUE) } if(i < 1000 & i >= 100){ mydata <- RJSONIO::fromJSON(paste0(baseurl,"000",i), flatten=TRUE) } if(i < 10000 & i >= 1000){ mydata <- RJSONIO::fromJSON(paste0(baseurl,"00",i), flatten=TRUE) } if(i < 100000 & i >= 10000){ mydata <- RJSONIO::fromJSON(paste0(baseurl,"0",i), flatten=TRUE) } if(i < 1000000 & i >= 100000){ mydata <- RJSONIO::fromJSON(paste0(baseurl,i), flatten=TRUE) } mydata <- RJSONIO::fromJSON(paste0(baseurl,i), flatten=TRUE) pages3[[i]] <- mydata$resultatenHR options(timeout = 4000000) if(i %% 100 == 0){Sys.sleep(5)} if(i %% 1000 == 0){ final_df<-do.call(rbind,pages3) final<- Reduce(function(x,y) merge(x, y, all=TRUE), final_df) mytime <- format(Sys.time(), "%b_%d_%H_%M_%S_%Y") myfile <- file.path(R(), paste0(mytime, "_", i, ".csv")) write.csv2(final, file = myfile, sep = "", row.names = FALSE, col.names = FALSE, quote = FALSE, append = FALSE) } } } }检查每个angular.isDefined对象中存在的items属性，然后遍历该属性以获取data数组中的text值：

＆＃13;

items

＆＃13;

var myApp = angular.module('myApp', []);

function MyCtrl($scope) {
  var data= [
    { text: "Item 1" },
    { text: "Item 2", items: [
      { text: "SubItem 2.1" },
      { text: "SubItem 2.2" }
    ] },
    { text: "Item 3" }
  ];
angular.forEach(data, function (value, key) 
  {
    console.log(value.text);
    if(angular.isDefined(value.items)){
      var itemsArray = value.items;
      angular.forEach(itemsArray, function (item, key){
        console.log(item.text);
      });
    }
  });
}

＆＃13;

如何在多维数组或json中使用angular.forEach（）

2 个答案: