for循環(huán)
```java
List myList=[1,2,3,4];
List newList = newList();
for (var I= 0 ;I < myList.length ?; i++) { ?newList.add(myList[I] * 2) ; }
```
for..in..
```python?
List myList=[1,2,3,4];
List newList = newList();
for(var I in myList){ newList.add( myList[I] * 2 );}
```
forEach
```python
ListmyList = [1,2,3,4];myList.forEach((v){
print(v);
});
```
map
```python
var newList = myList.map((v){
return v ?*2;
});
print(newList.toList());
```
where
返回滿足條件的值
```python?
List myList2 = [1,2,3,4,5,6,7];
var newList2 = myList.where((v){
return v > 5;
});
print(newList2.toList()); ?// 6,7
```
any
只要有一個滿足條件就返回true
```python
var ?f = myList.any((v){
return v > 5;
});
print(f); ?// true
```
every
條件都滿足了才能返回true 否則返回false
```python
var f2 = myList.every((v){
returnv > 5;
});
print(f2); // fasle
```
