Javascript javascript从for循环创建数组
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javascript create array from for loop
提问by Mauro74
I have a years range stored into two variables. I want to create an array of the years in the range.
我有一个存储在两个变量中的年份范围。我想在该范围内创建一个年份数组。
something like:
就像是：
var yearStart = 2000;
var yearEnd = 2040;
var arr = [];
for (var i = yearStart; i < yearEnd; i++) {
var obj = {
...
};
arr.push(obj);
}
What should I put inside the obj ?
我应该在 obj 里面放什么？
The array I'd like to generate would be like:
我想生成的数组将是这样的：
arr = [2000, 2001, 2003, ... 2039, 2040]
回答by Mat
even shorter if you can lose the yearStart value:
如果您可以丢失 yearStart 值，则更短：
var yearStart = 2000;
var yearEnd = 2040;
var arr = [];
while(yearStart < yearEnd+1){
arr.push(yearStart++);
}
UPDATE: If you can use the ES6 syntax you can do it the way proposed here:
更新：如果您可以使用 ES6 语法，则可以按照此处建议的方式进行操作：
let yearStart = 2000;
let yearEnd = 2040;
let years = Array(yearEnd-yearStart+1)
.fill()
.map(() => yearStart++);
回答by Littm
You need to push i
你需要推 i
var yearStart = 2000;
var yearEnd = 2040;
var arr = [];
for (var i = yearStart; i < yearEnd+1; i++) {
arr.push(i);
}
Then, your resulting array will be:
然后，您生成的数组将是：
arr = [2000, 2001, 2003, ... 2039, 2040]
arr = [2000, 2001, 2003, ... 2039, 2040]
Hope this helps
希望这可以帮助
回答by Mihai Iorga
var yearStart = 2000;
var yearEnd = 2040;
var arr = [];
for (var i = yearStart; i <= yearEnd; i++) {
arr.push(i);
}
回答by skunkfrukt
Remove objand just do this inside your for loop:
删除obj并在您的 for 循环中执行此操作：
arr.push(i);
Also, the i < yearEndcondition will not include the final year, so change it to i <= yearEnd.
此外，i < yearEnd条件不包括最后一年，因此将其更改为i <= yearEnd。
