Question

我有一个像这样的数组

arr=["rose","AA","lotus","BB","Jasmine","CC",tulip,"DD"];

$.each(arr, function(topics,i){
             document.write(topics);
             document.write(i);           

            })

我希望像印刷品一样印刷玫瑰-AA 莲花BB 茉莉花-CC tuplic-DD

如何在使用.each时将索引增加1？我尝试使用主题++，但它从未奏效。

Answer 1

尝试一个简单的for循环。

arr=["rose","AA","lotus","BB","Jasmine","CC","tulip","DD"];
for (var i = 0; i < arr.length; i+=2) {
   document.write(arr[i] + "-" + arr[i+1] + ' ');
}

Answer 2

使用简单的for循环进行迭代。（我假设arr的长度总是为偶数）

for(var i=0; i< arr.length; i = i+2){
         document.write(arr[i]+"-"+arr[i+1] + " ");

}

Answer 3

    var arr = ["rose", "AA", "lotus", "BB", "Jasmine", "CC", "tulip", "DD"];

    for (var i = 0; i < arr.length; i += 2) {
        document.write(arr[i] + "-" + arr[i + 1] + ' ');
    }

Answer 4

你可以跳过奇数指数：

$.each(arr, function(topics, i){
  if ((topics % 2) == 0) {
    document.write(topics);
    document.write(i);           
  }
});

演示：http://jsfiddle.net/Guffa/VT9tT/

如何将步长值增加2

4 个答案: