英文:
Why for loop returning last value alone instead of all other values in javascript
问题
以下是代码的翻译部分：
我有一个下面的函数，
function test(){
const obj = {}
const arr = []
for(let i = 0; i < 100; i++) {
obj.i = i
arr.push(obj)
}
return arr
}
const res = test();
console.log(res);
这段代码返回了以下结果：
[{"i":99},{"i":99},{"i":99},...,{"i":99}]
但为什么它没有返回以下结果：
[{"i":0},{"i":1},...,{"i":99}]
有什么原因。
英文:
I have function something below,
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
function test(){
const obj = {}
const arr = []
for(let i = 0; i < 100; i++) {
obj.i = i
arr.push(obj)
}
return arr
}
const res = test();
console.log(res);
<!-- end snippet -->
which returns
[{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99},{"i":99}]
but why it not return
[{"i":0},{"i":1},...,{"i":99}]
any reason.
答案1
得分: 2
你每次循环时都在替换该值。请像这样操作：
function test(){
const arr = []
for(let i = 0; i < 100; i++) {
const obj = {}
obj.i = i
arr.push(obj)
}
return arr
}
const res = test();
console.log(res);
英文:
You are replacing the value each time it is looping.Do like this
function test(){
const arr = []
for(let i = 0; i < 100; i++) {
const obj = {}
obj.i = i
arr.push(obj)
}
return arr
}
const res = test();
console.log(res);
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