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我想遍历嵌套数组var,并选择那些满足单个条件的数组元素。我试图仅在“el”中找到“selectedIndex”时才选择内部数组的所有第一个元素(“choice1,choice2 ...”)。例如:如果从下拉菜单中选择“opt2”,它不应该选择元素“choice2”和“choice4”,因为不存在该数组的“2”,但它应该得到所有其他的(choice1,choice3, choice5)。演示请点击here。 非常感谢提前。选择嵌套数组中的元素
var all_data = new Array(
new Array("selection1", new Array(
new Array("choice1", new Array('a', [1, 2, 3, 4]), new Array('b', [3, 4])),
new Array("choice2", new Array('a', [3, 4]), new Array('b', [1, 4]), new Array('c', [1, 3, 4]))
)),
new Array("selection2", new Array(
new Array("choice3", new Array('a', [2, 4]), new Array('b', [1, 3, 4]), new Array('c', [3, 4])),
new Array("choice4", new Array('b', [1, 4]), new Array('c', [1, 3])),
new Array("choice5", new Array('b', [1, 2, 4]), new Array('c', [1, 2, 3, 4]))
))
);
function arraySearch(arr, i) {
var result = [];
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j < arr[i].length; j++) {
for (var k = 0; k < arr[i][j].length; k++) {
var el = arr[i][j][k];
if (el instanceof Array) {
//alert(el);
//here i want to check if 'i' exists in each 'el'
//and if found, concat the element "choice1, choice2..."
}
}
}
}
return result;
}
function getChoices(){
selected_method = document.form.method.selectedIndex;
var n = selected_method+1;
var elements = arraySearch(all_data, n);
//alert(elements);
}
<select name="method" onchange="getChoices();">
<option>opt1</option>
<option>opt2</option>
<option>opt3</option>
<option>opt4</option>
</select>
您可以通过用* [*] *替换* new Array(...)*来节省一些输入。所以,它会更像* var all_data = [[“selection1”,[[“choice1”,['a',[1,2,3,4]]]]]] * – 2010-08-27 20:59:21