问题描述
我只想获得一个数字就可以了:
class MyConfig(models.Model):
pass
class ConfigItem(models.Model):
key = models.CharField(max_length=255)
value = models.CharField(max_length=255)
config = models.ForeignKey(MyConfig,on_delete=models.CASCADE)
我想得到let results = [2,2,1,3,1]
let pivot = 1
let cont = 0
let unitaries = []
for (var i = 0; i < results.length; i++) {
if (pivot !== results[i + 1]) {
pivot = results[i]
if (cont === 0) {
unitaries.push(results[i])
results.splice(i,1);
}
cont++
}
}
console.log(unitaries)
,但现在我只得到[1,1]
解决方法
此处正在修改原始数组。
const results = [2,2,1,3,1]
for (let i = 0; i < results.length;)
{
let j = i;
while (j < results.length)
{
if (results[j] === results[i]) j++;
else break;
}
if ((j - 1) > i) results.splice(i,j - i);
else i++;
}
console.log(results);
,
只需使用build
覆盖原始数组:
Array.prototype.filter