我正在测试删除数组中的对象...因为这是一个测试,这是一个非正式的代码..
<script type="text/javascript">
// initialize array and objects
var fruits = new Array();
var z = {
test1: "test0",
test2: "test2"
}
fruits.push(z);
var z2 = {
test1: "test1",
test2: "test2"
}
fruits.push(z2);
var z3 = {
test1: "test2",
test2: "test2"
}
fruits.push(z3);
var z4 = {
test1: "test3",
test2: "test2"
}
fruits.push(z4);
var z5 = {
test1: "test4",
test2: "test2"
}
fruits.push(z5);
// display array length
document.write("array length is " + fruits.length + "<br>");
// traverse array
for(var x = 0; x < fruits.length; x++){
// display object content in array
document.write(fruits[x].test1 + " ");
// delete object in array where variable test1 is equal to "test2"
if(fruits[x].test1 == "test2"){
fruits.splice(x, 1);
//document.write("array length is " + fruits.length + "<br>");
}
}
</script>
现在这段代码工作正常(删除数组上的一个对象),但它删除了我要删除的那个之后的那个(在上面的代码中,我想删除索引2中的对象,但它删除了索引中的对象3)
我在这段代码中做错了什么?
TIA:)
答案 0 :(得分:6)
迭代时不应该尝试更改数组。而是将要删除的元素的索引保存在变量中,并在for循环后将其删除。
答案 1 :(得分:0)
这应该有效:
<script type="text/javascript">
// initialize array and objects
var fruits = new Array();
var z = {
test1: "test0",
test2: "test2"
}
fruits.push(z);
var z2 = {
test1: "test1",
test2: "test2"
}
fruits.push(z2);
var z3 = {
test1: "test2",
test2: "test2"
}
fruits.push(z3);
var z4 = {
test1: "test3",
test2: "test2"
}
fruits.push(z4);
var z5 = {
test1: "test4",
test2: "test2"
}
fruits.push(z5);
// display array length
document.write("array length is " + fruits.length + "<br>");
// traverse array
for(var x = 0; x < fruits.length; x++){
// display object content in array
document.write(fruits[x].test1 + " ");
// delete object in array where variable test1 is equal to "test2"
if(fruits[x].test1 == "test2"){
fruits.splice(x-1, 1);
//document.write("array length is " + fruits.length + "<br>");
}
}
</script>
答案 2 :(得分:0)
在underscore.js中使用''filter''作为implemented:
_.filter(fruits, function (fruit) {
return fruit.test1 !== "test2";
});
这样做的好处是可以使用快速的原生JavaScript方法(''filter'')。